View Filing Data

Depreciation and amortization

21,765

18,856

17,985

20,407

15,901

15,676

(Gain) loss on disposal of fixed assets

(329)

544

Gain on property casualty indemnification

(303)

(928)

Total costs and expenses

85,450

70,795

65,139

Operating income

125,500

64,702

52,238

Other income (expense):

Interest expense

(7,393)

(1,654)

(5,438)

Income before income tax (expense) benefit

(6,382)

Interest income

Other income

140

431

Total other expense, net

(7,350)

(1,481)

(11,347)

118,150

63,221

40,891

Income tax (expense) benefit:

Current

(1,087)

(576)

(5,860)

Deferred

27,366

Income tax (expense) benefit

(1,087)

(576)

21,506

Allocation of 2011 net income for earnings per unit calculation:

117,063

62,645

62,397

Net income prior to initial public offering on July 19, 2011

117,063

62,645

62,397

(38,591)

Net income subsequent to initial public offering on July 19, 2011

117,063

62,645

23,806

Allocation of net income to partners:

Net income allocated to common unitholders

22,096

^[1]

1,489

^[1]

476

48,326

^[1]

30,578

^[1]

11,665

Net income allocated to subordinated unitholders

$ 46,641

^[1]

$ 30,578

^[1]

$ 11,665

Earnings per limited partner unit:

Common unit (basic and diluted) (in dollars per share)

$ 2.45

^[1]

$ 1.57

^[1]

$ 0.60

Subordinated unit (basic and diluted) (in dollars per share)

$ 2.40

^[1]

$ 1.57

^[1]

$ 0.60

Weighted average number of limited partner units outstanding:

Common unit (basic and diluted) (in shares)

19,735

19,450

Subordinated unit (basic and diluted) (in shares)

19,450

[1]	Amounts attributable to 2011 are reflective of general and limited partner interest in net income subsequent to the closing of the Partnership’s initial public offering on July 19, 2011.

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 117,063	$ 62,645	$ 62,397
Postretirement benefit plan adjustment, net of $0, $0 and $33 tax benefit for 2013, 2012 and 2011, respectively	0	0	(62)
Comprehensive income	$ 117,063	$ 62,645	$ 62,335

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Postretirement benefit plan adjustment, net of tax benefit	$ 0	$ 0	$ 33

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 117,063	$ 62,645	$ 62,397
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,407	15,901	15,676
Deferred income tax benefit	0	0	(27,366)
Postretirement net periodic benefit cost	0	0	695
Unrealized gain on investment in mutual funds	0	0	(96)
Increase in cash surrender value of life insurance policies	0	0	(42)
(Gain) loss on disposal of fixed assets	(329)	13	544
Gain on property casualty indemnification	(303)	0	(928)
Amortization of deferred financing costs	196	165	66
Changes in assets and liabilities:
Trade and other receivables	(5,850)	(6,599)	(579)
Federal income taxes due (to) from parent	0	(1,210)	4,174
Prepaid expenses and other assets	(523)	(57)	665
Accounts receivable/payable, affiliates	2,703	1,682	3,754
Accounts payable and accrued expenses	(248)	2,847	(3,070)
Deferred compensation	0	0	453
Deferred revenue	1,185	(133)	33
Total adjustments from operating activities	17,238	12,609	(6,021)
Net cash provided by operating activities	134,301	75,254	56,376
Cash flows from investing activities:
Issuance of notes receivable, affiliate	(111,000)	(52,000)	(38,500)
Collections of notes receivable, affiliate	39,000	39,300	20,200
Payments for purchase of property, plant and equipment	(180,672)	(149,827)	(27,772)
Proceeds from sale of property, plant and equipment	440	0	14
Payment for disposal of assets	0	0	(544)
Purchase of intangible assets	(3,739)	0	0
Proceeds from property casualty indemnification	0	0	1,298
Investment in life insurance policies	0	0	(1,378)
Proceeds from sale of mutual funds	0	0	1,378
Net cash used in investing activities	(255,971)	(162,527)	(45,304)
Cash flows from financing activities:
Borrowings under loan agreement, affiliate	50,000	125,000	0
Borrowings under credit agreement, affiliate	100,000	6,000	0
Payments under credit agreement, affiliate	(106,000)	0	0
Payments under notes payable, affiliate	(2,500)	(2,500)	(127,458)
Debt issuance costs	(225)	(1,250)	(250)
Net proceeds from issuance of common units	154,317	0	227,807
Contribution from general partner	3,271	0	1
Distributions paid to partners	(66,932)	(56,742)	(96,082)
Net cash provided by financing activities	131,931	70,508	4,018
Net increase (decrease) in cash and cash equivalents	10,261	(16,765)	15,090
Cash and cash equivalents — Beginning of period	7,071	23,836	8,746
Cash and cash equivalents — End of period	$ 17,332	$ 7,071	$ 23,836

Consolidated Statements of Partners' Capital - USD ($) $ in Thousands	Total	Pre-Formation General Partners’ Interests	Pre-Formation Limited Partners’ Interests	Pre-Formation Accumulated Other Comprehensive Loss	Post-Formation General Partners’ Interests	Post-Formation Limited Partners' Interests, Common Units	Post-Formation Limited Partners' Interests, Subordinated Units
Balance at Dec. 31, 2010	$ 104,049	$ 1,056	$ 104,595	$ (1,602)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income prior to initial public offering on July 19, 2011	38,591	386	38,205
Postretirement benefit plan adjustment, net of $33 tax benefit	(62)			(62)
Contributions from partners	1		1
Net distribution of assets and liabilities to partners	(20,085)	(217)	(21,532)	1,664
Cash distribution to partners	(83,630)	(836)	(82,794)	0
Net income	62,397
Balance at Jul. 19, 2011	38,864	389	38,475
Balance at Dec. 31, 2010	104,049	1,056	104,595	(1,602)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income prior to initial public offering on July 19, 2011	(38,591)
Postretirement benefit plan adjustment, net of $33 tax benefit	(62)
Net income	62,397
Balance at Dec. 31, 2011	279,847				1,041	245,314	33,492
Balance at Jul. 19, 2011	38,864	389	38,475
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash distribution to partners	(10,630)				(212)	(5,209)	(5,209)
Contribution of net assets to Oiltanking Partners, L.P. in exchange for common units, subordinated units, incentive distribution rights and a 2% general partner interest	0	(389)	(38,475)		777	11,051	27,036
Issuance of common units to public, net of offering costs	227,807					227,807
Net income	23,806				476	11,665	11,665
Balance at Dec. 31, 2011	279,847				1,041	245,314	33,492
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income prior to initial public offering on July 19, 2011	0
Postretirement benefit plan adjustment, net of $33 tax benefit	0
Net income	62,645
Balance at Dec. 31, 2012	285,928				1,398	248,176	36,354
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income prior to initial public offering on July 19, 2011	0
Postretirement benefit plan adjustment, net of $33 tax benefit	0
Contributions from partners	3,271				3,271
Cash distribution to partners	(66,932)				(2,164)	(32,384)	(32,384)
Issuance of common units to public, net of offering costs	154,317					154,317
Net income	117,063				22,096	48,326	46,641
Balance at Dec. 31, 2013	$ 493,647				$ 24,601	$ 418,435	$ 50,611

Consolidated Statements of Partners' Capital (Parenthetical) - USD ($) $ in Thousands		5 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Postretirement benefit plan adjustment, net of tax benefit			$ 0	$ 0	$ 33
General Partners’ Interests
Limited liability company (llc) or limited partnership (lp), managing member or general partner, ownership interest	2.00%	2.00%	2.00%

Organization	12 Months Ended
Organization	Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATION Organization Oiltanking Partners, L.P. (“OILT”) is a Delaware limited partnership formed by Oiltanking Holding Americas, Inc. (“OTA”) on March 14, 2011, to engage in the independent terminaling, storage and transportation of crude oil, refined petroleum products and liquefied petroleum gas (“LPG”). OTA owns and controls OILT’s general partner, OTLP GP, LLC (“general partner”). Through its wholly owned subsidiaries, Oiltanking Houston, L.P. (“OTH”) and Oiltanking Beaumont Partners, L.P. (“OTB”), OILT owns and operates storage and terminaling assets located along the United States Gulf Coast on the Houston Ship Channel and in Beaumont, Texas. As discussed further below, OILT completed its initial public offering (“IPO”), and OTA and its affiliates contributed all of their equity interests in OTH and OTB to OILT on July 19, 2011. Through July 18, 2011, OTH and OTB were wholly owned subsidiaries of OTA. At December 31, 2013 and 2012, OTA owned OILT’s general partner, 7,949,901 common units and 19,449,901 subordinated units. OTA is a wholly owned subsidiary of Oiltanking GmbH. Oiltanking Finance B.V. (“OT Finance”) is a wholly owned finance company of Oiltanking GmbH that serves as the global financing division for the Oiltanking Group’s terminal holdings, including us, and arranges loans and notes at market rates and terms for approved terminal construction projects. Oiltanking GmbH and its subsidiaries, other than OILT and its subsidiaries, are collectively referred to herein as the “Oiltanking Group.” As used in this document, the terms “we,” “us,” and “our” and similar terms refer to OILT and its subsidiaries, where applicable, unless the context indicates otherwise. At December 31, 2013, we had outstanding (i) 22,049,901 common units and 19,449,901 subordinated units representing limited partner interests, (ii) a 2.0% general partner interest and (iii) incentive distribution rights (“IDRs”). OTA and its affiliates hold 66.0% of all of our outstanding common and subordinated units (or a 64.7% limited partner interest), and other security holders hold the remaining 34.0% (or a 33.3% limited partner interest). The limited partners collectively hold a 98.0% limited partner interest in OILT, and the general partner holds a 2.0% general partner interest in OILT. Offerings IPO. On July 19, 2011, we completed our IPO of 11,500,000 common units, including 1,500,000 common units issued in connection with the underwriters’ exercise of their over-allotment option, at a price to the public of $21.50 per unit. Our common units are listed on the New York Stock Exchange under the symbol “OILT.” In exchange for OTA and its affiliates contributing all of their equity interests in OTH and OTB to OILT on July 19, 2011, OILT issued an aggregate of 7,949,901 common units and 19,449,901 subordinated units to OTA and its affiliates and IDRs to its general partner. The net proceeds from our IPO of approximately $231.2 million, after deducting underwriting discounts and structuring fees, were used to: (i) repay intercompany indebtedness owed to OT Finance in the amount of approximately $119.5 million, (ii) pay OT Finance for approximately $1.0 million of interest due on intercompany indebtedness and reimburse OT Finance for approximately $6.4 million of fees incurred in connection with the repayment of such indebtedness, (iii) make distributions to OTA and its affiliates in the aggregate amount of $77.2 million, (iv) pay other offering expenses of approximately $3.4 million and (v) provide us with working capital of approximately $23.7 million. In anticipation of our IPO, certain assets and liabilities of OTH and OTB were distributed to OTA. We historically sponsored a non-pension postretirement benefit plan for the employees of all entities owned by OTA and a deferred compensation plan for certain employees (see Notes 11 and 12). On June 1, 2011, the postretirement benefit and deferred compensation plans and obligations were distributed to and assumed by OTA, and certain assets used to fund the deferred compensation plan obligations were distributed to OTA. In addition, effective June 1, 2011, our former employees were transferred to OTA, and OTA became the sponsor of our self-insurance program and 401(k) retirement plan (see Notes 11 and 12). OTH and OTB also made non-cash distributions to OTA, consisting of certain land parcels, an office building, other property and equipment, certain accounts receivable and notes receivable, affiliate. OTH and OTB also made cash distributions to OTA. Net deferred tax assets related to these assets and liabilities were also distributed to OTA. See Note 15 for further information regarding the amounts distributed to OTA. Follow-on Offering. On November 22, 2013, we completed a public offering of 2,600,000 common units at a price to the public of $61.65 per unit. The proceeds from the offering, net of underwriting discounts and other offering expenses, totaled approximately $154.3 million. In connection with the offering, our general partner contributed an additional $3.3 million to us to maintain its 2.0% general partner interest in us. See Note 9 for further information regarding this offering.

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

We adhere to the following significant accounting policies in the preparation of our consolidated financial statements.

Basis of Presentation and Principles of Consolidation

Because the contribution of OTH and OTB to OILT was a transaction among businesses under common control, the accounts of OTH and OTB have been reflected retroactively in our financial statements at a carryover basis. Therefore, for periods prior to our IPO, the accompanying consolidated financial statements and related notes present the historical accounts of OTH and OTB. The accompanying consolidated financial statements, to the extent they relate to periods prior to our IPO, may not necessarily be indicative of the actual results of operations that might have occurred if OILT had existed as a separate entity during those periods. In addition, the effects of our IPO, certain related asset and liability transfers, cash distributions and debt extinguishment transactions that occurred in June and July 2011 are reflected in the historical consolidated financial statements on the dates the transactions occurred.

The consolidated financial statements and the accompanying notes are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and the rules of the U.S. Securities and Exchange Commission (“SEC”). All significant intercompany transactions and balances have been eliminated in consolidation.

Asset Retirement Obligations

We regularly assess our legal obligations with respect to estimated retirements of certain of our long-lived assets to determine if an asset retirement obligation (“ARO”) exists. GAAP requires the fair value of a liability related to the retirement of long-lived assets be recorded at the time a legal obligation is incurred, if the liability can be reasonably estimated. When the liability is initially recorded, the carrying amount of the related asset is increased by the amount of the liability. Over time, the liability is accreted to its future value, with the accretion recorded to expense. GAAP further requires where there is an obligation to perform an asset retirement activity, even though uncertainties exist about the timing or method of settlement, an entity is required to recognize a liability for the fair value of a conditional ARO if the fair value of the liability can be determined.

Our assets generally consist of storage tanks and underground pipelines and related facilities along rights-of-way. Our rights-of-way agreements typically do not require the dismantling, removal and reclamation of the right-of-way upon permanent removal of the pipelines and related facilities from service. Additionally, we are unable to predict when, or if, our pipelines, storage tanks and related facilities would become completely obsolete and require decommissioning. Accordingly, we have not recorded a liability or corresponding asset as both the amounts and timing of such potential future costs are indeterminable.

Business Segments

We report in one business segment. We derive our revenues from two operating segments — OTH and OTB. The two operating segments have been aggregated into one reportable segment because they have similar long-term economic characteristics, types and classes of customers and provide similar services. The aggregation of operating segments into one reportable segment requires management to evaluate whether there are similar expected long-term economic characteristics for each operating segment, and is an area of significant judgment. If the expected long-term economic characteristics of our operating segments were to become dissimilar, then we could be required to re-evaluate the number of reportable segments.

Capitalization of Interest

Interest on borrowed funds is capitalized on projects during construction based on the approximate average interest rate of our debt. Interest capitalized for the years ended December 31, 2013, 2012 and 2011 was $2.1 million, $1.7 million and $0.6 million, respectively.

Cash and Cash Equivalents

Cash equivalents represent all highly liquid investments with original maturities of three months or less. The carrying value of cash equivalents approximates fair value because of the short-term nature of these investments. At December 31, 2013 and 2012, cash and cash equivalents was comprised of cash held in banks.

Our consolidated statements of cash flows are prepared using the indirect method. The indirect method derives net cash flows from operating activities by adjusting net income to remove (i) the effects of all deferrals of past operating cash receipts and payments, such as changes during the period in deferred income and similar transactions, (ii) the effects of all accruals of expected future operating cash receipts and cash payments, such as changes during the period in receivables and payables, (iii) the effects of all items classified as investing or financing cash flows, such as gains or losses on sale of property, plant and equipment or extinguishment of debt, and (iv) other non-cash amounts such as depreciation and amortization.

Concentrations of Credit Risk

Financial instruments that potentially subject us to concentrations of credit risk consist principally of cash, cash equivalents, trade receivables and other receivables. Cash and cash equivalents are held on deposit with major banks. We maintain our cash and cash equivalents at financial institutions for which the combined account balances in individual institutions may exceed Federal Deposit Insurance Corporation (“FDIC”) insurance coverage and, as a result, there is a credit risk related to amounts on deposits in excess of FDIC coverage. We believe the financial institutions holding these amounts are financially sound and, accordingly, minimal credit risk exists with respect to these assets.

We extend credit to our customers primarily in the petroleum and related service industries but do not consider there to be any concentration of credit risk with any single customer. See Note 14 for additional information.

Contingencies

Certain conditions may exist as of the date our consolidated financial statements are issued that may result in a loss to us, but which will only be resolved when one or more future events occurs or fails to occur. Our management, with input from legal counsel, assesses such contingent liabilities, and such assessment inherently involves an exercise in judgment. In assessing loss contingencies related to legal proceedings pending against us or unasserted claims that may result in proceedings, our management, with input from legal counsel, evaluates the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein.

If the assessment of a contingency indicates it is probable a material loss has been incurred and the amount of liability can be estimated, then the estimated liability would be accrued in our consolidated financial statements. If the assessment indicates a potentially material loss contingency is not probable but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, is disclosed.

Loss contingencies considered remote are generally not disclosed unless they involve guarantees, in which case the guarantees would be disclosed.

Debt Issuance Costs

Costs incurred to issue our debt instruments are capitalized and amortized over the life of the associated debt instrument using the effective interest method. If the debt instrument is retired before its scheduled maturity date, any remaining issuance costs associated with that debt instrument are expensed in the same period.

Deferred Compensation

We established and maintained an unfunded, non-qualified deferred compensation plan for a select group of management or highly compensated employees. The purpose of the deferred compensation plan was to permit designated employees to accumulate additional retirement income through a non-qualified deferred compensation plan that enabled them to defer compensation to which they will become entitled in the future. On June 1, 2011, the deferred compensation plan and obligations were distributed to and assumed by OTA, and certain assets to be used to fund the deferred compensation plan obligations were distributed to OTA.

Earnings per Limited Partner Unit

Basic and diluted net income per unit is determined by dividing net income, after deducting the general partner’s interest, allocated to each class of limited partner units, by the weighted average number of limited partner units for such class outstanding during the period. We allocate net income to our limited partners and our general partner in accordance with our partnership agreement. Under the two-class method, because our partnership agreement does not limit distributions to our general partner with respect to IDRs to available cash, we allocate undistributed earnings to our general partner utilizing the distribution waterfall for available cash specified in our partnership agreement. Diluted earnings per limited partner unit reflects, where applicable, the potential dilution that could occur if securities or other agreements to issue additional units of a limited partner class, such as phantom unit awards, were exercised, settled or converted into such units (see Note 10). We currently do not have any of these types of awards outstanding.

Environmental Expenditures

Environmental costs are expensed if they relate to an existing condition caused by past operations and do not contribute to current or future revenue generation. Liabilities are recorded when site restoration, environmental remediation, cleanup or other obligations are either known or considered probable and can be reasonably estimated. At December 31, 2013 and 2012, we had not identified any environmental obligations that would require an accrual in our consolidated financial statements.

Estimates

The preparation of our consolidated financial statements in conformity with GAAP requires management to use estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. We base our estimates and judgments on historical experience and on various other assumptions and information we believe to be reasonable under the circumstances. Estimates and assumptions about future events and their effects cannot be perceived with certainty and, accordingly, these estimates may change as new events occur, as more experience is acquired, as additional information is obtained and as our operating environment changes. While we believe the estimates and assumptions used in the preparation of the consolidated financial statements are appropriate, actual results could differ from those estimates.

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at a specified measurement date. Fair value measurements are derived using inputs and assumptions market participants would use in pricing an asset or liability, including assumptions about risk. GAAP establishes a valuation hierarchy for disclosure of the inputs used to measure fair value. This three-tier hierarchy classifies fair value amounts recognized or disclosed in the financial statements based on the observability of inputs used to estimate such fair values. The classification within the hierarchy of a financial asset or liability is determined based on the lowest level input that is significant to the fair value measurement. The hierarchy considers fair value amounts based on observable inputs (Levels 1 and 2) to be more reliable and predictable than those based primarily on unobservable inputs (Level 3).

Notes receivable, affiliate are reported in the consolidated balance sheets at amounts which approximate fair value due to the relatively short period to maturity of these financial instruments (Level 2). The carrying values of our fixed-rate debt obligations approximate fair value based upon borrowing rates currently available to us for loans with similar terms (Level 2). The carrying values of our variable-rate debt obligations approximate their fair values because the associated interest rates are market-based. See Note 8 for further details of our fixed-rate and variable-rate debt obligations.

We believe our valuation methods are appropriate and consistent with the values that would be determined by other market participants. However, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.

Impairment Assessment of Long-Lived Assets

We periodically evaluate whether events or circumstances have occurred that indicate the estimated remaining useful life of long-lived assets, including property and equipment, may warrant revision or that the carrying value of these assets may be impaired. We evaluate the potential impairment of long-lived assets based on undiscounted cash flow expectations for the related asset relative to its carrying value. These future estimates are based on historical results, adjusted to reflect our best estimates of future market and operating conditions. Actual results may vary materially from our estimates, and accordingly may cause a full impairment of the long-lived assets. If a long-lived asset is considered to be impaired, the impairment loss is measured as the amount by which the carrying amount of the asset exceeds its fair value, calculated using a discounted future cash flows analysis. There were no impairments recorded for the years ended December 31, 2013, 2012 and 2011.

Income Taxes

For periods prior to our IPO, no provision for U.S. federal income taxes has been made in our consolidated financial statements related to the operations of OTB, as OTB had been treated as a partnership not subject to federal income tax and the tax effects of OTB’s operations were included in the consolidated federal income tax return of OTA. OTH also was included in the consolidated federal income tax return of OTA, but OTH historically had elected to be taxed as a corporation, and income tax expense included provisions calculated as if OTH had filed a separate tax return utilizing a statutory rate of 35%. Deferred income taxes resulted from temporary differences between the income tax basis of the assets and liabilities and the amounts reported in OTH’s financial statements.

In July 2011, OTH elected to be treated as a disregarded entity for U.S. federal income tax purposes. Due to the change in tax status of OTH, we recognized a non-recurring income tax benefit of $27.1 million related to the elimination of the deferred tax account balances, which is included in our consolidated statement of income for the year ended December 31, 2011.

The financial statement benefit of an uncertain tax position is recognized only after considering the probability a tax authority would sustain the position in an examination. For tax positions meeting a “more-likely-than-not” threshold, the amount recognized in the financial statements is the benefit expected to be realized upon settlement with the tax authority. For tax positions not meeting the threshold, no financial statement benefit is recognized. We recognize interest and other charges relating to unrecognized tax benefits as additional tax expense. We have not recognized any liabilities for uncertain tax positions in our consolidated balance sheets.

Effective January 1, 2007, the Texas margin tax applies to legal entities conducting business in Texas, including previously non-taxable entities such as limited partnerships and limited liability partnerships. The margin tax is based on our Texas-sourced taxable margin. The tax is calculated by applying a tax rate to a base that considers both revenues and expenses and therefore has the characteristics of an income tax.

Intangible Assets

In June 2013, we acquired emission allowances for $3.7 million from a third party, primarily for use in connection with the expansion of storage capacity at our Houston area facilities. These emission allowances are being accounted for as intangible assets with a finite life and will be amortized to operating expenses based on units of production once the assets that will utilize the emission allowances are placed into service, which is expected to begin in 2015.

Investments

We held mutual funds and life insurance policies with cash surrender values in conjunction with our deferred compensation plan. The investments were carried at fair value, with unrealized gains and losses reported as other income (expense). On June 1, 2011, the deferred compensation plan and obligations were distributed to and assumed by OTA, and certain assets to be used to fund the deferred compensation plan obligations were distributed to OTA.

Net Income Allocation

We allocate net income to our partners for two primary purposes: (i) under the two-class method for purposes of computing earnings per limited partner unit and (ii) in accordance with the partnership agreement for purposes of maintaining our limited partners’ and general partner’s capital accounts.

We allocate net income to our limited partners and our general partner in accordance with our partnership agreement. Under the two-class method, because our partnership agreement does not limit distributions to our general partner with respect to IDRs to available cash, we allocate undistributed earnings to our general partner utilizing the distribution waterfall for available cash specified in our partnership agreement. Cash payments made to our general partner and limited partners are determined in relation to actual distributions declared and are not based on the net income allocations used in the calculation of earnings per unit.

Postretirement Benefit Plan Obligations

Prior to our IPO, we sponsored an unfunded multi-employer postretirement healthcare benefit plan, covering employees and retirees of OTH, OTB and other subsidiaries of OTA. Because OTH was the primary obligor, the postretirement benefit liabilities represented the present value of all of the benefit obligations of the plan. Postretirement benefit costs were developed from actuarial valuations. Actuarial assumptions were established to anticipate future events and were used in calculating the expense and liabilities related to this plan. These factors included assumptions management made regarding interest rates, rates of increase in health care costs and employee turnover rates, among others. Management reviewed and updated these assumptions on an annual basis. The actuarial assumptions used could have differed from actual results due to changing market rates or other factors. These differences could have impacted the amount of postretirement benefit expense recorded. Effective June 1, 2011, OTA became the sponsor of our postretirement healthcare benefit plan, and our obligations under this plan along with our former employees were transferred to OTA.

Property, Plant and Equipment

We record property, plant and equipment at its original acquisition cost. Property, plant and equipment are stated at the lower of historical cost less accumulated depreciation or fair value less subsequent accumulated depreciation, if impaired. We capitalize all direct and indirect construction costs and related interest. Indirect construction costs include general engineering, taxes and the cost of funds used during construction. Costs, including complete asset replacements and enhancements or upgrades that increase the original efficiency, productivity or capacity of property, plant and equipment, are also capitalized. The costs of repairs, minor replacements and maintenance projects which do not increase the original efficiency, productivity or capacity of property, plant and equipment, are expensed as incurred.

Property, plant and equipment are depreciated using the straight-line method, over the estimated useful life of each asset as follows:



	Estimated Life in Years
Production and terminal facilities	4 to 40
Rights of way	10 to 15

We assign asset lives based on reasonable estimates when an asset is placed into service. Subsequent events could cause us to change our estimates, which would impact the future calculation of depreciation expense.

Revenue Recognition

We provide integrated storage, throughput and ancillary services for third-party companies engaged in the production, distribution and marketing of crude oil, refined petroleum products and LPG. We generate revenues through the provision of services to our customers under a combination of multi-year and month-to-month agreements. Certain agreements contain “take-or-pay” provisions whereby we are entitled to a minimum throughput or storage fee. We recognize revenues when the service is provided, the crude oil, refined petroleum products and LPG are received at or delivered from our terminals or when the customer’s ability to make up the minimum volume has expired, in accordance with the terms of the contracts.

We recognize revenues in accordance with applicable accounting standards. Our assessment of each of the four revenue recognition criteria as they relate to our revenue producing activities is as follows:


•	Persuasive Evidence of an Arrangement Exists. Our customary practices are to enter into a written contract, executed by both the customer and us.


•	Service is Provided. We consider services provided when the crude oil, refined petroleum products and LPG are shipped through, delivered by or stored in our pipelines, terminals and storage facilities, as applicable.


•	Fixed or Determinable Fee. We negotiate the fees for our services at the outset of our fee-based agreements. Under certain contracts, the fees generally are due in advance on the first of the month. For other agreements, the amount of revenue is determinable after services are provided and volumes handled can be measured.

•

Collection is Deemed Probable. Collectability is evaluated on a customer-by-customer basis. We conduct a credit review for all customers at the inception of a new agreement to determine the creditworthiness of potential and existing customers. Collection is deemed probable if we expect the customer will be able to pay amounts under the agreement as payments become due. If we determine collection is not probable, revenues are deferred and recognized upon cash collection.

We collect taxes on certain revenue transactions to be remitted to governmental authorities, which may include sales, use, value added and some excise taxes. These taxes are not included in revenue.

Trade Receivables and Allowance for Doubtful Accounts

Trade accounts receivable are customer obligations due under agreed-upon trade terms. We regularly perform credit evaluations of our customers and generally do not require collateral. We regularly review trade accounts receivable to determine if any receivables could potentially be uncollectible, and if so, include a determined amount in the allowance for doubtful accounts. Based on the information available, we believe no allowance for doubtful accounts was needed at December 31, 2013 and 2012. However, actual write-offs may occur.

Unit-Based Compensation

We have a long-term incentive plan, the Oiltanking Partners, L.P. Long-Term Incentive Plan (the “LTIP”), for employees, consultants and directors of the general partner and those of its affiliates, including Oiltanking North America, LLC (“OTNA”), a subsidiary of OTA, who perform services for us. The LTIP provides for the grant of restricted units, unit options, phantom units, unit payments, unit appreciation rights, other equity-based awards, distribution equivalent rights and performance awards. The LTIP limits the number of common units that may be delivered pursuant to awards under the plan to 3,889,980 units. As of December 31, 2013, no awards have been granted under the LTIP.

Related Party Transactions

12 Months Ended

Dec. 31, 2013

RELATED PARTY TRANSACTIONS

We have engaged in certain transactions with other OTA subsidiaries, as well as other companies related to us by common ownership. Ongoing transactions include our provision of storage and ancillary services to these affiliates. Prior to July 19, 2011, we also provided certain centralized administrative services including, among others, rental of administrative and operations office facilities, human resources, information technology, engineering, environmental and regulatory, treasury and certain financial services. Amounts charged for storage and ancillary services are classified as revenues. Amounts charged for the other administrative services discussed above are classified as a reduction of selling, general and administrative expense. Effective July 19, 2011, OTA began providing these administrative services to us and other OTA affiliates.

Total revenues for related party services were as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2013		2012		2011

Storage and ancillary service fees	$	3,317	$	3,212	$	3,142
Other revenues	—		13		1,565
Total related party revenues	$	3,317	$	3,225	$	4,707

Prior to our IPO, we paid fees directly to Oiltanking GmbH for various general and administrative services, which included, among others, risk management, environmental compliance, legal consulting, information technology, engineering, centralized cash management and certain treasury and financial services. Oiltanking GmbH allocated these costs to us using several factors, such as our tank capacity and total volumes handled. In management’s estimation, the costs charged for these services approximated the amounts that would have been incurred for similar services purchased from third parties or provided by our own employees. Subsequent to our IPO, these services are provided pursuant to the Services Agreement discussed below.

Effective June 1, 2011, in anticipation of our IPO, all of our former employees were transferred to OTA. Effective July 19, 2011, certain operating and selling, general and administrative services necessary to operate our business are provided by OTA pursuant to the Services Agreement. Charges for these services are included in operating and selling, general and administrative expenses in the table below.

We also paid annual maintenance and technical support costs for proprietary software owned by Oiltanking GmbH, which we use in performing terminaling services for our customers. Each terminal location was allocated a portion of the global Oiltanking GmbH maintenance costs based on the number of users located at each facility. In management’s estimation, the costs incurred approximate the amounts that would have been incurred for similar third-party software programs for terminaling operations. Subsequent to our IPO, these services are provided pursuant to the Services Agreement.

During the years ended December 31, 2013, 2012 and 2011, we capitalized $5.5 million, $4.3 million and $0.9 million, respectively, of related party engineering services into construction in progress.

At December 31, 2013 and 2012, total related party accounts receivable were $0.1 million and $0.6 million, respectively. Total related party accounts payable were $4.3 million and $2.0 million at December 31, 2013 and 2012, respectively. Additionally, we had $6.7 million and $0.1 million within accounts payable and accrued expenses at December 31, 2013 and 2012, respectively, associated with related party administrative fees (see Note 5).

Long-term debt payable to OT Finance, including both current and long-term portions, at December 31, 2013 and 2012, was $190.8 million and $149.3 million, respectively. In July 2011, we repaid approximately $119.5 million of the outstanding notes payable, affiliate, with proceeds from our IPO. We also reimbursed OT Finance for approximately $6.4 million of fees incurred in connection with the repayment of such indebtedness. See Note 8 for further details of our debt and credit agreements.

At December 31, 2013 and 2012, total interest and commitment fees payable to OT Finance under term loans and credit financing arrangements of $0.6 million and $0.6 million, respectively, were included in accounts payable and accrued expenses (see Note 5).

From time to time, we invest cash with OT Finance in short-term notes receivable at then-prevailing market rates. At December 31, 2013 and 2012, we had short-term notes receivable of $100.0 million and $28.0 million, respectively, from OT Finance, bearing weighted-average interest rates of 0.23% and 0.15%, respectively.

The following table summarizes related party operating expenses, selling, general and administrative expenses, interest expense and interest income reflected in the consolidated statements of income for the periods indicated (in thousands):



	Year Ended December 31,
	2013		2012		2011

Operating	$	15,129	$	12,997	$	4,795
Selling, general and administrative (1)	17,908		15,952		10,622
Interest expense (net of amounts capitalized)	7,368		1,628		5,413
Loss on early extinguishment of debt	—		—		6,382
Interest income	30		33		42

____________

(1)

Amounts represent selling, general and administrative expenses incurred under the Services Agreement (as defined below) beginning July 19, 2011. For the period from July 19, 2011 through December 31, 2011, we incurred $6.6 million of selling, general and administrative expenses under the Services Agreement. Selling, general and administrative expenses for the years ended December 31, 2013, 2012 and 2011 also include $1.0 million, $1.1 million and $0.3 million, respectively, of costs from OTA related to ongoing maintenance for an invoicing and inventory computer system that are reimbursable under the Services Agreement but not included in the annual fixed fee set forth in the agreement.

See Notes 1 and 15 for a discussion of asset and liability transfers made in connection with our IPO.

Transactions with a Certain Director

One of the directors of our general partner, David L. Griffis, is employed by and a shareholder of the law firm of Crain, Caton & James, P.C., a firm that provides legal counsel to us, as well as to OTA and certain of its other affiliates. Fees for legal services paid to Crain, Caton & James, P.C. for services provided to us totaled $1.2 million, $1.1 million and $0.8 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Agreements with Affiliates

Services Agreement. On July 19, 2011, in connection with our IPO, we entered into a services agreement (the “Services Agreement”) with our general partner and OTNA, a subsidiary of OTA, and subsequently amended the Services Agreement in December 2011, pursuant to which OTNA agreed to provide us certain specified selling, general and administrative services necessary to manage our business for an annual fixed fee, payable in equal monthly installments. We also agreed to reimburse OTNA for all operating expenses and all expenses it incurs as a result of our becoming a publicly traded partnership, including all operating expenses it incurs with respect to insurance coverage for our business, with such reimbursement obligations not subject to any cap.

The initial term of the Services Agreement is ten years, and it will automatically renew for additional twelve-month periods following the expiration of the initial term unless and until either we or OTNA provide 180 days written notice of intent to terminate the agreement. During the initial term or any renewal term, the annual fixed fee related to selling, general and administrative expenses will be adjusted as necessary each year to account for inflation as measured by the consumer price index. In addition, with the approval of the Conflicts Committee of the board of directors of our general partner, the fee may be adjusted to account for growth in our business or asset base. In January 2013, the annual fixed fee was increased from $14.9 million to $15.1 million as a result of an increase in the consumer price index.

In August 2013, the Conflicts Committee of the board of directors of our general partner approved a requested increase to the fixed fee charged to us under the Services Agreement to $18.8 million on an annualized basis to reflect higher selling, general and administrative expenses associated with expansion projects placed in service in 2013. These expansion projects include the Houston crude oil storage and pipeline expansion, the first phase of our Appelt storage facility and related pipeline connections, and incremental refined petroleum products storage at our Beaumont terminal. The fee increase was effective as of July 1, 2013.

Omnibus Agreement. On July 19, 2011, in connection with the closing of our IPO, we entered into an omnibus agreement (the “Omnibus Agreement”) with our general partner and OTA, pursuant to which OTA agreed to provide us with a license to use the name “Oiltanking” and related marks in connection with our business at no cost to us.

The Omnibus Agreement also provides for certain indemnification obligations between us and OTA with respect to the assets which were contributed to us by OTA in connection with the closing of our IPO. OTA’s indemnification obligations to us include the following: (i) for a period of three years after the closing of our IPO, OTA will indemnify us for environmental losses arising out of any event or circumstance associated with the operation of our assets prior to the closing of our IPO of up to $15.0 million in the aggregate, provided that OTA will only be liable to provide indemnification for losses to the extent that the aggregate dollar amount of losses suffered by us exceeds $0.5 million in any calendar year; (ii) until 60 days after the applicable statute of limitations, OTA will indemnify us for any additional federal, state and local income tax liabilities attributable to the ownership and operation of our assets and the assets of our subsidiaries prior to the closing of our IPO; (iii) for a period of three years after the closing of our IPO, OTA will indemnify us for any losses resulting from the failure to have all necessary consents and governmental permits necessary for us to operate our assets in substantially the same manner in which they were used and operated immediately prior to the closing of our IPO; and (iv) for a period of three years after the closing of our IPO, OTA will indemnify us for any losses resulting from our failure to have valid and indefeasible easement rights, rights-of-way, leasehold and/or fee ownership interests in the lands where our assets are located if such failure prevents us from using or operating our assets in substantially the same manner as they were operated immediately prior to the closing of our IPO. The Omnibus Agreement will generally remain in effect so long as OTA controls our general partner, or unless mutually terminated by the parties.

Property, Plant and Equipment [Abstract]

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References + Details

Property, Plant and Equipment

12 Months Ended

Dec. 31, 2013

PROPERTY, PLANT AND EQUIPMENT

Property, plant and equipment consist of the following at the dates indicated (in thousands):



	December 31,
	2013			2012

Land	$	23,436		$	23,340
Production and terminal facilities	661,184			460,239
Construction in progress	120,761			136,876
Total property, plant and equipment	805,381			620,455
Less: accumulated depreciation	(219,555		)	(202,166		)
Total property, plant and equipment, net	$	585,826		$	418,289

Depreciation and amortization expense was $20.4 million, $15.9 million and $15.7 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Interest costs capitalized as part of the costs of construction in progress were $2.1 million, $1.7 million and $0.6 million during the years ended December 31, 2013, 2012 and 2011, respectively.

During the year ended December 31, 2013, we recognized a gain of $0.3 million from proceeds received for an insurance claim related to damages sustained during a hurricane in 2008. During the year ended December 31, 2011, we recognized gains of $0.9 million, of which $0.7 million was a gain from proceeds received for an insurance claim related to damages sustained during a hurricane in 2008 and $0.2 million was a gain from proceeds received for an insurance claim resulting from property damages which occurred in 2008 to a dock at our Beaumont terminal.

During the year ended December 31, 2013, we recognized a gain of $0.3 million on the disposal of certain terminal assets that were dismantled. During the years ended December 31, 2012 and 2011, we recognized losses of less than $0.1 million and approximately $0.5 million, respectively, on the disposal of certain terminal assets that were dismantled.

Accounts Payable and Accrued Expenses

12 Months Ended

Dec. 31, 2013

Payables and Accruals [Abstract]

ACCOUNTS PAYABLE AND ACCRUED EXPENSES

Accounts payable and accrued expenses consist of the following at the dates indicated (in thousands):



	December 31,
	2013		2012

Accounts payable, trade	$	3,820	$	7,891
Accrued capital expenditures	15,120		12,732
Accrued property taxes	6,952		4,987
Accrued sales and other taxes	421		207
Related party interest and commitment fees payable	557		611
Related party administrative fees payable	6,703		60
Deferred revenue	2,609		1,039
Other	1,922		1,872
Total accounts payable and accrued expenses	$	38,104	$	29,399

Deferred Revenue	12 Months Ended
Deferred Revenue	Dec. 31, 2013
Deferred Revenue Disclosure [Abstract]
Deferred Revenue Disclosure	DEFERRED REVENUE During 2007, we entered into a modification of a lease, in which we, as a lessor, received a one-time upfront rental payment of $2.5 million, which is being amortized on a straight-line basis over the term of the lease of approximately sixteen years. At December 31, 2013 and 2012, deferred revenue related to this upfront rental payment was $1.4 million and $1.6 million, respectively, of which $0.2 million at each date was current and included in accounts payable and accrued expenses. During 2010, we entered into a modification of a revenue agreement with a customer and received a one-time payment of $2.0 million, which is being amortized on a straight-line basis over the remaining term of the agreement of approximately nine years. At December 31, 2013 and 2012, deferred revenue related to this one-time payment was $1.1 million and $1.4 million, respectively, of which $0.2 million at each date was current and included in accounts payable and accrued expenses. At December 31, 2011, we had $0.4 million of current deferred revenue related to an advance payment received from a customer, and such amount was included in accounts payable and accrued expenses. During the first quarter of 2012, we completed the construction of pipeline-related assets for the customer, and recognized the deferred revenue of $0.4 million related to the project. At December 31, 2013 and 2012, we had $2.2 million and $0.6 million, respectively, of current deferred revenue related to a customer throughput and deficiency agreement.

Income Taxes

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

INCOME TAXES

In July 2011, OTH elected to be treated as a disregarded entity for U.S. federal income tax purposes. Upon the change in tax status of OTH, we recognized a non-recurring income tax benefit of $27.1 million related to the elimination of all of our deferred tax accounts, which is included in our consolidated statements of income for the year ended December 31, 2011.

Due to our status as a partnership, we and our subsidiaries, including OTH and OTB, are not subject to U.S. federal or state income taxes, with the exception of the Texas margin tax.

Total income tax expense differed from the amounts computed by applying the tax rate to income before income tax expense as a result of the following for the periods indicated (in thousands):



	Year Ended December 31,
	2011

Income before income tax benefit	$	40,891
U.S. federal corporate statutory rate	35		%
Expected income tax expense	(14,312		)
OILT, OTB and OTH income not subject to income tax	8,974
Elimination of deferred tax account balances	27,052
Texas margin tax, net of federal income tax benefit	(208		)
Total income tax benefit	$	21,506

During the years ended December 31, 2013 and 2012, we recorded $1.1 million and $0.6 million, respectively, of income tax expense related to the Texas margin tax.

Our policy is to classify any interest and penalties associated with income taxes as income tax expense. During the years ended December 31, 2013, 2012 and 2011, we did not recognize any amounts in respect of potential interest and penalties associated with income taxes.

Our 2009 through 2013 tax years are potentially subject to examination by the federal and state taxing authorities because the statutes of limitations for those years have not closed.

Debt

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

DEBT

Long-term debt, affiliate, consists of the following at the dates indicated (in thousands):



	December 31,
	2013			2012

6.78% Note due 2019 – OTH	$	5,400		$	6,300
7.45% Note due 2019 – OTB	4,800			5,600
7.02% Note due 2020 – OTB	5,600			6,400
4.55% OTH $125.0 million Loan Agreement, due 2022	125,000			125,000
5.435% OTH $50.0 million Loan Agreement, due 2023	50,000			—
OILT Credit Agreement, due 2017	—			6,000
Total debt	190,800			149,300
Less current portion	(2,500		)	(2,500		)
Total long-term debt, affiliate	$	188,300		$	146,800

The following table presents the scheduled maturities of principal amounts of our debt obligations for the next five years and in total thereafter (in thousands):



	Years Ending
	December 31,

2014	$	2,500
2015	2,500
2016	2,500
2017	2,500
2018	2,500
Thereafter	178,300
Total	$	190,800

In connection with our IPO, we repaid intercompany indebtedness owed to OT Finance in the amount of approximately $119.5 million, reimbursed OT Finance for approximately $6.4 million of fees incurred in connection with the repayment of such indebtedness, and paid $1.0 million of interest. The $6.4 million payment is reflected as a loss on the early extinguishment of debt in our consolidated statement of income for the year ended December 31, 2011.

At December 31, 2013, under the most restrictive terms of our covenants, partners’ capital of $316.2 million was available for distribution.

OTH and OTB Notes

At December 31, 2013, we have three outstanding notes with OT Finance. Two of the outstanding notes contain loan covenants requiring OTB to maintain certain debt, leverage and equity ratios and prohibit OTB from pledging its assets to third parties or incurring any indebtedness other than from OT Finance without its consent. At December 31, 2013 and 2012, no assets had been pledged to third parties. The loan covenants in these agreements require OTB to maintain certain Financial Parameters (as such term is defined in the note agreements), including: (i) a ratio of Stockholders’ Equity to non-current assets of 30% or greater, (ii) a ratio of EBITDA to Total Debt Service of 1.2 or greater and (iii) a ratio of Net Financial Indebtedness to EBITDA of 3.75 or less (as such terms are defined in the note agreements). At December 31, 2013, OTB’s ratio of Stockholders’ Equity to non-current assets, the ratio of EBITDA to Total Debt Service and the ratio of Net Financial Indebtedness to EBITDA (as such terms are defined in the note agreements) were 97.1%, 9.0 and 0.12, respectively. At December 31, 2013, OTB was in compliance with all covenants under the respective note agreements.

OTH Loan Agreements

On May 16, 2012, OTH entered into a ten-year $125.0 million unsecured loan agreement with OT Finance (the “$125.0 million Loan Agreement”) for the purpose of financing the purchase of property, plant and equipment, through which borrowings were available through December 15, 2012, with a maturity date of December 15, 2022. During its availability period, interest on borrowings outstanding under this loan agreement was calculated on the basis of an annual interest rate determined by OT Finance, which represented OT Finance’s cost of funds, plus a margin of 2.70% per annum. In October 2012, OTH agreed to fix the interest rate applicable to borrowings under this loan agreement after the availability period at 4.55% per annum (calculated as the USD Swap Rate for ten years as of the date of determination of 1.85% plus a margin of 2.70%). A commitment fee of 1.00% per annum was calculated on the undrawn amount of the $125.0 million Loan Agreement and paid at the end of each month during the availability period. Interest that accrued during the availability period was payable at the end of the availability period. After the availability period, interest payments are payable semi-annually, beginning in December 2012. OTH paid an arrangement fee in June 2012 of $0.8 million to OT Finance, the expense of which was deferred and is being amortized over the term of the loan agreement. At December 31, 2013 and 2012, OTH had $125.0 million of outstanding borrowings under this loan agreement at a fixed interest rate of 4.55% per annum.

On June 26, 2013, OTH entered into a ten-year $50.0 million unsecured loan agreement with OT Finance (the “$50.0 million Loan Agreement”) for the purpose of financing the purchase of property, plant and equipment, through which borrowings were available through August 31, 2013, with a maturity date of June 30, 2023. During its availability period, interest on borrowings outstanding under this loan agreement was calculated on the basis of an annual interest rate determined by OT Finance, which represented OT Finance’s cost of funds, plus a margin of 2.60% per annum. After the end of the availability period and through the maturity date, interest is calculated on the basis of the USD swap rate for ten years, plus a margin of 2.60% per annum. Interest that accrued during the availability period was payable at the end of the availability period. After the availability period, interest payments are payable semi-annually, beginning in December 2013. OTH paid an arrangement fee in July 2013 of $0.2 million to OT Finance, the expense of which was deferred and is being amortized over the term of the loan agreement. In July 2013, OTH borrowed $50.0 million under this loan agreement, and the proceeds were used to repay outstanding balances under the revolving line of credit agreement (discussed below). In July 2013, OTH also agreed to fix the interest rate applicable to borrowings under this loan agreement after the availability period at 5.435% per annum (calculated as the USD swap rate for ten years as of the date of determination of 2.835% plus a margin of 2.60%). At December 31, 2013, OTH had $50.0 million of outstanding borrowings under this loan agreement at a fixed interest rate of 5.435% per annum.

The loan agreements contain covenants restricting the ability of OTH to take certain actions without the consent of OT Finance, including incurring additional indebtedness, pledging its assets or amending its organizational documents. The loan agreements contain borrowing conditions and events of default, including events of default triggered by (i) OTH failing to satisfy the Financial Parameters and other covenants described in this paragraph after more than 30 days’ notice, (ii) OTH failing to repay borrowings under the loan agreements when they become due, and (iii) OTH ceasing to be controlled by Oiltanking GmbH. The loan agreements require OTH to maintain certain Financial Parameters (as such term is defined in the loan agreements), including: (i) a ratio of Stockholders’ Equity to non-current assets of 30% or greater, (ii) a ratio of EBITDA to Total Debt Service of 1.2 or greater, and (iii) a ratio of Net Financial Indebtedness to EBITDA of 3.75 or less (as such terms are described in the loan agreements). At December 31, 2013, OTH’s ratio of Stockholders’ Equity to non-current assets, the ratio of EBITDA to Total Debt Service and the ratio of Net Financial Indebtedness to EBITDA (as such terms are defined in the loan agreements) were 60.2%, 15.3 and 1.35, respectively. At December 31, 2013, OTH was in compliance with all covenants contained in the loan agreements.

OILT Credit Agreement

On November 7, 2012, OILT entered into Addendum No. 2 to its unsecured revolving line of credit agreement with OT Finance to increase the amount of the revolving credit commitment from $50.0 million to $150.0 million and to extend the maturity date from June 30, 2013 to November 30, 2017 (as amended, the “Credit Agreement”). From time to time upon OILT’s written request and in the sole determination of OT Finance, the revolving credit commitment can be increased up to an additional $75.0 million, for a maximum revolving credit commitment of $225.0 million. Borrowings bear interest at LIBOR plus a margin ranging from 1.65% to 2.50% depending upon a leverage-based grid. Any unused portion of the revolving line of credit is subject to a commitment fee of 0.35% per annum. OILT paid an arrangement fee of $0.5 million to OT Finance in November 2012 in connection with the amendment, the expense of which has been deferred and is being amortized over the term of the Credit Agreement. In November 2013, OILT repaid $56.0 million outstanding under the Credit Agreement with proceeds from our public offering of units (see Note 9). As of December 31, 2013, OILT had no borrowings outstanding under the Credit Agreement. As of December 31, 2012, OILT had $6.0 million of outstanding borrowings under the Credit Agreement at a weighted average interest rate of 2.44% per annum.

The Credit Agreement requires OILT to maintain, on an calendar year basis, certain Financial Parameters (as such term is defined in the Credit Agreement), including: (i) a ratio of Stockholders’ Equity to non-current assets of 30% or greater, (ii) a ratio of EBITDA to Total Debt Service of 1.2 or greater and (iii) a ratio of Net Financial Indebtedness to EBITDA of 3.75 or less (as such terms are defined in the Credit Agreement). At December 31, 2013, OILT’s ratio of Stockholders’ Equity to non-current assets, the ratio of EBITDA to Total Debt Service and the ratio of Net Financial Indebtedness to EBITDA (as such terms are defined in the Credit Agreement) were 83.5%, 2.2 and 1.19, respectively. At December 31, 2013, OILT was in compliance with all covenants contained in the Credit Agreement.

Partners' Capital and Distributions

12 Months Ended

Dec. 31, 2013

Equity [Abstract]

PARTNERS' CAPITAL AND DISTRIBUTIONS

PARTNERS’ CAPITAL AND DISTRIBUTIONS

Summary of Changes in Outstanding Units

The following is a reconciliation of our limited partner units outstanding for the periods indicated:



	Limited Partner Units
	Common	Subordinated	Total

Limited partner units outstanding at December 31, 2010	—	—	—
Units issued in exchange for contribution of net assets to OILT	7,949,901	19,449,901	27,399,802
Units issued in IPO on July 19, 2011	11,500,000	—	11,500,000
Limited partner units outstanding at December 31, 2011	19,449,901	19,449,901	38,899,802
Units issued in 2012	—	—	—
Limited partner units outstanding at December 31, 2012	19,449,901	19,449,901	38,899,802
Units issued in public offering in November 2013	2,600,000	—	2,600,000
Limited partner units outstanding at December 31, 2013	22,049,901	19,449,901	41,499,802

Initial Public Offering

As discussed in Note 1, in connection with the closing of our IPO, OTA and its affiliates contributed their interests in OTH and OTB to us, and we issued an aggregate of 7,949,901 common units and 19,449,901 subordinated units, both of which represent limited partner interests, to OTA and its affiliates, and issued IDRs to our general partner.

On July 19, 2011, we issued 11,500,000 common units to the public, which included 1,500,000 common units issued pursuant to the underwriters’ exercise of their over-allotment option. The net proceeds from our IPO of approximately $231.2 million, after deducting underwriting discounts and structuring fees, were used to: (i) repay intercompany indebtedness owed to OT Finance in the amount of approximately $119.5 million, (ii) pay OT Finance for approximately $1.0 million of interest due on intercompany indebtedness and reimburse OT Finance for approximately $6.4 million of fees incurred in connection with the repayment of such indebtedness, (iii) make distributions to OTA and its affiliates in the aggregate amount of $77.2 million, (iv) pay other offering expenses of approximately $3.4 million and (v) provide us working capital of approximately $23.7 million.

Equity Offering

On November 22, 2013, we completed a public offering of 2,600,000 common units at a price to the public of $61.65 per unit. The proceeds from the offering, net of underwriting discounts and other offering expenses, totaled approximately $154.3 million and were used to repay outstanding balances under the Credit Agreement, fund capital projects and for general partnership purposes. In connection with the offering, our general partner contributed an additional $3.3 million to us to maintain its 2.0% general partner interest in us.

Distributions

Our partnership agreement requires that, within 45 days after the end of each quarter, we distribute our available cash (as defined in our partnership agreement) to unitholders of record on the applicable record date.

The following table details the distributions paid during or pertaining to the years ended December 31, 2013, 2012 and 2011 (in thousands, except per unit amounts):



		Common and		General		Incentive				Distributions
	Date Paid	Subordinated		Partner’s		Distribution				per Limited
Date Declared	or To Be Paid	Units		2% Interest		Rights		Total		Partner Unit

October 20, 2011	November 14, 2011	$	10,418	$	212	$	—	$	10,630	$	0.2678
January 23, 2012	February 14, 2012	$	13,226	$	270	$	—	$	13,496	$	0.34
April 23, 2012	May 14, 2012	$	13,614	$	278	$	—	$	13,892	$	0.35
July 19, 2012	August 14, 2012	$	14,004	$	286	$	—	$	14,290	$	0.36
October 18, 2012	November 14, 2012	$	14,588	$	298	$	—	$	14,886	$	0.375
January 22, 2013	February 14, 2013	$	15,171	$	310	$	11	$	15,492	$	0.39
April 22, 2013	May 14, 2013	$	15,754	$	324	$	100	$	16,178	$	0.405
July 22, 2013	August 14, 2013	$	16,532	$	342	$	238	$	17,112	$	0.425
October 21, 2013	November 14, 2013	$	17,310	$	363	$	477	$	18,150	$	0.445
January 21, 2014	February 14, 2014	$	19,505	$	415	$	827	$	20,747	$	0.47

Our partnership agreement requires that we distribute all of our available cash (as defined in our partnership agreement) each quarter in the following manner:


•	first, 98.0% to the holders of our common units and 2.0% to our general partner, until each common unit has received the minimum quarterly distribution of $0.3375 plus any arrearages from prior quarters;


•	second, 98.0% to the holders of our subordinated units and 2.0% to our general partner, until each subordinated unit has received the minimum quarterly distribution of $0.3375; and


•	third, 98.0% to all unitholders pro rata, and 2.0% to our general partner, until each unit has received a quarterly distribution of $0.38813.

The general partner’s IDRs provide that if cash distributions to our unitholders exceed $0.38813 per common unit and subordinated unit in any quarter, our unitholders and our general partner will receive, including its 2.0% general partner interest, distributions according to the following percentage allocations:



	Target Quarterly Distribution Target Amount	Marginal Percentage Interest in Distributions
	Target Quarterly Distribution Target Amount	Unitholders	General Partner
Minimum quarterly distribution	$0.3375	98.0%	2.0%
First target distribution	above $0.3375 up to $0.38813	98.0%	2.0%
Second target distribution	above $0.38813 up to $0.42188	85.0%	15.0%
Third target distribution	above $0.42188 up to $0.50625	75.0%	25.0%
Thereafter	above $0.50625	50.0%	50.0%

Our general partner, as the initial holder of all of our IDRs, has the right, at any time when there are no subordinated units outstanding and it has received incentive distributions at the highest level to which it is entitled (48.0%, in addition to distributions paid on its 2.0% general partner interest) for each of the prior four consecutive whole fiscal quarters, to reset the initial target distribution levels at higher levels based on our cash distributions at the time of the exercise of the reset election. If our general partner elects to reset the target distribution levels, it will be entitled to receive a number of common units and a general partner interest necessary to maintain its general partner interest in us immediately prior to the reset election. The number of common units to be issued to our general partner will equal the number of common units that would have entitled the holder to an average aggregate quarterly cash distribution in the prior two quarters equal to the average of the distributions to our general partner on the IDRs in such prior two quarters.

If our general partner transfers all or a portion of the IDRs in the future, then the holder or holders of a majority of our IDRs will be entitled to exercise the reset election. Assuming our general partner holds all of the IDRs at the time a reset election is made, following a reset election, the minimum quarterly distribution will be adjusted to equal the reset minimum quarterly distribution, and the target distribution levels will be reset to correspondingly higher levels based on the same percentage increases above the reset minimum quarterly distribution as the current target distribution levels.

Subordinated Units

All of our subordinated units are owned directly or indirectly by OTA. The principal difference between our common units and subordinated units is that in any quarter during the subordination period, holders of the subordinated units are not entitled to receive any distribution until the common units have received the minimum quarterly distribution (defined below) plus any arrearages in the payment of the minimum quarterly distribution from prior quarters. Subordinated units will not accrue arrearages.

The subordination period will end on the first business day after we have earned and paid at least: (i) $1.35 (the minimum quarterly distribution on an annualized basis) on each outstanding common unit and subordinated unit and the corresponding distribution on our general partner’s 2.0% interest for each of three consecutive, non-overlapping four-quarter periods ending on or after September 30, 2014; or (ii) $2.025 (150.0% of the annualized minimum quarterly distribution) on each outstanding common unit and subordinated unit and the corresponding distribution on our general partner’s 2.0% interest and the related distribution on the IDRs for the four-quarter period immediately preceding that date, in each case provided there are no arrearages on our common units at that time. Since our IPO in July 2011, we have paid at least the minimum quarterly distribution on our common units in all quarters. If we continue to pay distributions from available cash and generate operating surplus (as defined in our partnership agreement) at a rate consistent with prior periods, the subordination period is expected to end following our payment of the distribution for the quarter ending September 30, 2014.

The subordination period also will end upon the removal of our general partner other than for cause if no subordinated units or common units held by the holder(s) of subordinated units or their affiliates are voted in favor of that removal.

When the subordination period ends, all subordinated units will convert into common units on a one-for-one basis, and thereafter no common units will be entitled to arrearages.

Earnings Per Limited Partner Unit

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

EARNINGS PER LIMITED PARTNER UNIT

The following table sets forth the computation of basic and diluted earnings per limited partner unit for the periods indicated (amounts in thousands, except per unit data):



					July 19, 2011
	Year Ended				through
	December 31,				December 31,
	2013		2012		2011

Net income	$	117,063	$	62,645	$	62,397
Net income prior to IPO on July 19, 2011	—		—		(38,591		)
Net income subsequent to IPO on July 19, 2011	117,063		62,645		23,806

Less: General partner’s incentive distribution earned (1)	19,755		237		—
Less: General partner’s 2.0% ownership interest	2,341		1,252		476
Net income allocated to limited partners	$	94,967	$	61,156	$	23,330

Numerator for basic and diluted earnings per limited partner unit:
Allocation of net income among limited partner interests:
Net income allocable to common units	$	48,326	$	30,578	$	11,665
Net income allocable to subordinated units	46,641		30,578		11,665
Net income allocated to limited partners	$	94,967	$	61,156	$	23,330

Denominator:
Basic and diluted weighted average number of limited partner units outstanding:
Common units	19,735		19,450		19,450
Subordinated units	19,450		19,450		19,450

Basic and diluted net income per limited partner unit:
Common units	$	2.45	$	1.57	$	0.60
Subordinated units	$	2.40	$	1.57	$	0.60

____________

(1)

Based on the amount of net income for the years ended December 31, 2013 and 2012, our general partner was allocated income associated with its IDRs for these periods. Under the two-class method, because our partnership agreement does not limit distributions to our general partner with respect to IDRs to available cash, we allocate undistributed earnings to our general partner utilizing the distribution waterfall for available cash specified in our partnership agreement. Cash payments made to our general partner and limited partners are determined in relation to actual distributions declared and are not based on the net income allocations used in the calculation of earnings per unit.

Employee Benefits	12 Months Ended
Employee Benefits	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
EMPLOYEE BENEFITS	EMPLOYEE BENEFITS 401(K) Retirement Plan We previously sponsored a retirement plan which is available to all employees who have six months of continuous service and covers all employees of OTA. The plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 and is qualified under Section 401(k) of the Internal Revenue Code. The contributions to the plan, as determined by management, are discretionary but may not exceed the maximum amount deductible under the applicable provisions of the Internal Revenue Code. Historically, we made contributions into the plan on behalf of all OTA subsidiaries and were then reimbursed by the related subsidiary. Our contributions to the retirement plan, net of amounts charged to other OTA entities, was $0.8 million for the year ended December 31, 2011. Effective June 1, 2011, in anticipation of our IPO, our former employees were transferred to OTA, and OTA became the sponsor of the 401(k) retirement plan. Subsequent to our entry into the Services Agreement (see Note 3), costs for the 401(k) retirement plan are incurred by OTA and billed to us by OTA pursuant to the Services Agreement. Deferred Compensation Plan Effective August 15, 1994, we adopted a special non-qualified deferred compensation plan for the purpose of providing deferred compensation to certain employees. The plan provides for elective salary deferrals by participants and discretionary contributions by us as defined by the plan. We recognized $0.1 million of accrued compensation to participants for the year ended December 31, 2011. Payments of accrued compensation totaled $0.2 million for the year ended December 31, 2011. We purchased life insurance policies on certain of our employees and invested in mutual funds to assist in funding the deferred compensation liability. All payments of accrued compensation to participants were funded by our operating cash flows. Employee deferrals totaled $0.4 million for the year ended December 31, 2011. The deferred compensation liability was determined by hypothetical investment accounts based on actual mutual funds or money market funds selected by each participant. On June 1, 2011, in anticipation of our IPO, the deferred compensation plan obligations, related insurance policies and mutual funds, along with our former employees, were transferred to OTA. Subsequent to our entry into the Services Agreement (see Note 3), costs for the deferred compensation plan are incurred by OTA and billed to us by OTA pursuant to the Services Agreement.

Medical Insurance and Postretirement Benefit Obligation

12 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

MEDICAL INSURANCE AND POSTRETIREMENT BENEFIT OBLIGATIONS

Medical Insurance

Prior to June 1, 2011, we sponsored a self-insurance program for medical and dental insurance administered by a third party, which covered all of our former employees. The total expense and obligations to the administrator was a result of administrative fees, premiums and actual incidence of claims. Under the program, we were responsible for a predetermined limit of claims per participant per year, or a maximum of approximately $3.0 million to $4.0 million in the aggregate per year, in accordance with the plan agreements. Claims exceeding these amounts were covered by an insurance policy. Effective June 1, 2011, our former employees were transferred to OTA, and OTA became the sponsor of the self-insurance program. Subsequent to our entry into the Services Agreement (see Note 3), costs for the insurance program plan are incurred by OTA and billed to us by OTA pursuant to the Services Agreement.

Postretirement Benefit Plan

Effective June 1, 2004, we established a non-pension postretirement benefit plan. The plan was designed to provide health care coverage, upon retirement, to the employees of OTA who met the age and service requirements. The health plan was contributory, with participants’ contributions adjusted annually. We were required to reflect the funded status of the defined benefit postretirement health plan as a prepaid asset or an accrued liability and to recognize the net deferred and unrecognized gains and losses, net of tax, as part of accumulated other comprehensive income within partners’ capital. We used a December 31 measurement date for the plan. Effective June 1, 2011, OTA became the sponsor of the postretirement benefit plan, and our obligations under this plan along with our former employees were transferred to OTA. Subsequent to our entry into the Services Agreement (see Note 3), costs for the postretirement benefit plan are incurred by OTA and billed to us by OTA pursuant to the Services Agreement.

The following table presents our net periodic benefit costs for the period indicated (in thousands):



	Year Ended December 31,
	2011

Service cost	$	447
Interest cost	190
Amortization of unrecognized amounts:
Prior service cost	47
Net actuarial loss	11
Net periodic benefit costs	$	695

The following table presents changes in plan assets and benefit obligations recognized in other comprehensive income (loss) for the period indicated (in thousands):



	Year Ended December 31,
	2011

Current period net loss	$	(153	)
Amortization of prior service cost	47
Amortization of prior net actuarial loss	11
Total recognized in other comprehensive loss	(95		)
Net periodic postretirement benefit cost	(695		)
Total recognized in net periodic postretirement benefit cost
and other comprehensive income	$	(790	)

The assumptions used in determining net benefit cost were as follows for the period indicated:



	Year Ended December 31,
	2011

Weighted average expense assumptions:
Discount rate at the beginning of year	5.68%
Initial health care cost trend rate (1)	9.50%
Ultimate health care cost trend rate	5.00%
Number of years to reach ultimate trend	10

__________


(1)	Rate represents assumed medical cost trend rate for all employee costs. Drug costs have a trend rate of 8.5%.

The discount rates are based on a discount rate analysis using the Citigroup Pension Discount Curve and the expected postretirement benefit cash flows. The resulting discount rates are consistent with the duration of plan liabilities.

Interest Expense

12 Months Ended

Dec. 31, 2013

Other Income and Expenses [Abstract]

INTEREST EXPENSE

The following table presents the components of interest costs incurred for the periods indicated (in thousands):



	Year Ended December 31,
	2013			2012			2011

Related party interest expense	$	(9,509	)	$	(3,377	)	$	(6,032	)
Capitalized related party interest	2,140			1,749			619
Other	(24		)	(26		)	(25		)
Total interest expense	$	(7,393	)	$	(1,654	)	$	(5,438	)

Major Customers

12 Months Ended

Dec. 31, 2013

Supplemental Cash Flow Elements [Abstract]

MAJOR CUSTOMERS

The following table presents the percentage of revenues and receivables associated with our significant customers for the periods indicated:



	% of Revenues						% of Receivables
	Year Ended December 31,						December 31,
	2013		2012		2011		2013		2012

Enterprise Products Partners L.P.	29	%	13	%	12	%	38	%	15	%
ExxonMobil Corporation	9	%	11	%	12	%	2	%	10	%
LyondellBasell Industries, N.V.	9	%	12	%	13	%	11	%	3	%
BP p.l.c.	8	%	16	%	15	%	6	%	18	%
Royal Dutch Shell plc	7	%	9	%	11	%	10	%	15	%
Total percentages associated with significant customers	62	%	61	%	63	%	67	%	61	%

No other customer accounted for more than 10% of our revenues during the years ended December 31, 2013, 2012 and 2011.

Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2013

SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flows and non-cash transactions were as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2013		2012		2011

Cash paid for interest of $9,369, $2,888 and $13,020 (net of capitalized interest) (1)	$	7,229	$	1,139	$	12,401
Cash taxes paid	943		1,210		1,686
Interest costs capitalized	2,140		1,749		619

Non-cash transactions:
Change in accounts payable related to capital expenditures	$	7,383	$	12,732	$	—
Distribution of certain land parcels and office building to OTA (2)	—		—		6,215
Distribution of certain accounts and notes receivable to OTA (2)	—		—		18,277
Transfer of postretirement plan obligation to OTA (including $1.7 million of accumulated other comprehensive loss) (2)	—		—		(8,824		)
Transfer of deferred compensation plan obligations to OTA (2)	—		—		(4,124		)
Transfer of deferred compensation plan assets to OTA (2)	—		—		4,010
Net deferred tax assets related to assets and liabilities transferred to OTA (2)	—		—		4,531
Cash distribution payable (3)	—		—		178

______________


(1)	2011 amount includes $6.4 million of fees incurred in connection with the repayment of indebtedness in connection with our IPO (see Note 8).

(2)

In connection with our IPO, OTH and OTB made non-cash distributions to OTA, consisting of certain land parcels, an office building and other property and equipment, certain accounts receivable and notes receivable, affiliate. In addition, the postretirement benefit and deferred compensation plans and obligations and certain assets to be used to fund the deferred compensation plan obligations were transferred to OTA. Related net deferred tax assets were also transferred to OTA.

(3)

At December 31, 2011, we had an accrued pre-IPO distribution to OTA of $0.2 million, which was reflected in accounts payable, affiliates, and such amount was paid to OTA in the first quarter of 2012. During the year ended December 31, 2011, we paid pre-IPO distributions to OTA of $85.5 million, consisting of: (i) $2.0 million, which had been declared during December 2010 and paid in January 2011, and was included in accounts payable, affiliates at December 31, 2011, and (ii) $83.4 million, which was paid to OTA in July 2011, $77.0 million of which was paid using proceeds from the public issuance of common units.

Segment Reporting

12 Months Ended

Dec. 31, 2013

SEGMENT REPORTING

We derive our revenues from two operating segments — OTH and OTB. The two operating segments have been aggregated into one reportable business segment because they have similar long-term economic characteristics, types and classes of customers and provide similar services.

Revenues by service category are as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2013		2012		2011

Storage service fees	$	120,245	$	97,591	$	87,794
Throughput fees	79,663		29,096		23,973
Ancillary service fees	11,042		8,810		5,610
Total revenues	$	210,950	$	135,497	$	117,377

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

Quarterly Financial Information Disclosure [Abstract]

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation In the ordinary course of business, we may be involved in various claims and legal proceedings, some of which are covered in whole or in part by insurance. We may not be able to predict the timing or outcome of these or future claims and proceedings with certainty, and an unfavorable resolution of one or more of such matters could have a material adverse effect on our financial condition, results of operations or cash flows. Currently, we are not party to any legal proceedings that, individually or in the aggregate, are reasonably likely to have a material adverse effect on our financial condition, results of operations or cash flows. Environmental Liabilities We may experience releases of crude oil, petroleum products and fuels, liquid petroleum gas or other contaminants into the environment, or discover past releases that were previously unidentified. Although we maintain an inspection program designed to prevent and, as applicable, to detect and address such releases promptly, damages and liabilities incurred due to any such environmental releases from our assets may affect our business. As of December 31, 2013 and 2012, we have not identified any environmental obligations that would require an accrual in our consolidated financial statements. Commitments We have certain short-term purchase obligations and commitments for products and services, primarily related to construction on our expansion projects. At December 31, 2013, we had commitments of approximately $10.9 million for the purchase of property, plant and equipment. Other Our liquid storage and transport systems may experience damage as a result of an accident, natural disaster or terrorist activity. These hazards can cause personal injury and loss of life, severe damage to and destruction of property, and equipment, pollution or environmental damage and suspension of operations. We maintain insurance of various types that we consider adequate to cover our operations and properties. The insurance covers our assets in amounts we consider reasonable. The insurance policies are subject to deductibles that we consider reasonable and not excessive. Our insurance does not cover every potential risk associated with operating our facilities, including the potential loss of significant revenues. The occurrence of a significant event not fully insured, indemnified or reserved against, or the failure of a party to meet its indemnification obligations, could materially and adversely affect our operations and financial condition.

Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2013

QUARTERLY FINANCIAL DATA (UNAUDITED)

Summarized quarterly financial data for the years ended December 31, 2013 and 2012 is set forth below (in thousands, except per unit amounts):



	First		Second		Third		Fourth
	Quarter		Quarter		Quarter		Quarter		Total
2013
Revenue	$	40,186	$	52,079	$	58,531	$	60,154	$	210,950
Operating income	21,234		31,378		35,774		37,114		125,500
Net income	20,192		29,476		32,883		34,512		117,063
Earnings per common unit – basic and diluted (1)	$	0.48	$	0.61	$	0.65	$	0.69	$	2.45
Earnings per subordinated unit – basic and diluted (1)	$	0.48	$	0.61	$	0.65	$	0.65	$	2.40

2012
Revenue	$	34,286	$	33,823	$	33,327	$	34,061	$	135,497
Operating income	16,192		17,033		15,471		16,006		64,702
Net income	15,939		16,621		14,907		15,178		62,645
Earnings per common unit – basic and diluted	$	0.40	$	0.41	$	0.38	$	0.38	$	1.57
Earnings per subordinated unit – basic and diluted	$	0.40	$	0.41	$	0.38	$	0.38	$	1.57

__________


(1)	The sum of the quarterly earnings per unit amounts do not equal the full year amounts due to rounding differences.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Principles of Consolidation

Basis of Presentation

Asset Retirement Obligations

Business Segments

Capitalization of Interest

Interest on borrowed funds is capitalized on projects during construction based on the approximate average interest rate of our debt.

Cash and Cash Equivalents

Concentration of Credit Risk

Concentrations of Credit Risk

Contingencies

Loss contingencies considered remote are generally not disclosed unless they involve guarantees, in which case the guarantees would be disclosed.

Debt Issuance Costs

Deferred Compensation

Earnings per Limited Partner Unit

Environmental Expenditures

Estimates

Fair Value Measurements

Impairment Assessment of Long-Lived Assets

Income Taxes

Intangible Assets

Investments

Net Income Allocation

Postretirement Benefit Plan Obligations

Property, Plant and Equipment

Property, plant and equipment are depreciated using the straight-line method, over the estimated useful life of each asset as follows:



	Estimated Life in Years
Production and terminal facilities	4 to 40
Rights of way	10 to 15

Revenue Recognition


•	Persuasive Evidence of an Arrangement Exists. Our customary practices are to enter into a written contract, executed by both the customer and us.


•	Service is Provided. We consider services provided when the crude oil, refined petroleum products and LPG are shipped through, delivered by or stored in our pipelines, terminals and storage facilities, as applicable.


•	Fixed or Determinable Fee. We negotiate the fees for our services at the outset of our fee-based agreements. Under certain contracts, the fees generally are due in advance on the first of the month. For other agreements, the amount of revenue is determinable after services are provided and volumes handled can be measured.

•

We collect taxes on certain revenue transactions to be remitted to governmental authorities, which may include sales, use, value added and some excise taxes. These taxes are not included in revenue.

Trade Receivables and Allowance for Doubtful Accounts

Unit-Based Compensation

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Property, Plant and Equipment

Property, plant and equipment are depreciated using the straight-line method, over the estimated useful life of each asset as follows:



	Estimated Life in Years
Production and terminal facilities	4 to 40
Rights of way	10 to 15

Property, plant and equipment consist of the following at the dates indicated (in thousands):



	December 31,
	2013			2012

Land	$	23,436		$	23,340
Production and terminal facilities	661,184			460,239
Construction in progress	120,761			136,876
Total property, plant and equipment	805,381			620,455
Less: accumulated depreciation	(219,555		)	(202,166		)
Total property, plant and equipment, net	$	585,826		$	418,289

Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Related Party Transactions



	Year Ended December 31,
	2013		2012		2011

Operating	$	15,129	$	12,997	$	4,795
Selling, general and administrative (1)	17,908		15,952		10,622
Interest expense (net of amounts capitalized)	7,368		1,628		5,413
Loss on early extinguishment of debt	—		—		6,382
Interest income	30		33		42

____________

(1)

Total revenues for related party services were as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2013		2012		2011

Storage and ancillary service fees	$	3,317	$	3,212	$	3,142
Other revenues	—		13		1,565
Total related party revenues	$	3,317	$	3,225	$	4,707

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment are depreciated using the straight-line method, over the estimated useful life of each asset as follows:



	Estimated Life in Years
Production and terminal facilities	4 to 40
Rights of way	10 to 15

Property, plant and equipment consist of the following at the dates indicated (in thousands):



	December 31,
	2013			2012

Land	$	23,436		$	23,340
Production and terminal facilities	661,184			460,239
Construction in progress	120,761			136,876
Total property, plant and equipment	805,381			620,455
Less: accumulated depreciation	(219,555		)	(202,166		)
Total property, plant and equipment, net	$	585,826		$	418,289

Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2013

Payables and Accruals [Abstract]

Schedule of accounts payable and accrued liabilities

Accounts payable and accrued expenses consist of the following at the dates indicated (in thousands):



	December 31,
	2013		2012

Accounts payable, trade	$	3,820	$	7,891
Accrued capital expenditures	15,120		12,732
Accrued property taxes	6,952		4,987
Accrued sales and other taxes	421		207
Related party interest and commitment fees payable	557		611
Related party administrative fees payable	6,703		60
Deferred revenue	2,609		1,039
Other	1,922		1,872
Total accounts payable and accrued expenses	$	38,104	$	29,399

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

Total income tax expense differed from the amounts computed by applying the tax rate to income before income tax expense as a result of the following for the periods indicated (in thousands):



	Year Ended December 31,
	2011

Income before income tax benefit	$	40,891
U.S. federal corporate statutory rate	35		%
Expected income tax expense	(14,312		)
OILT, OTB and OTH income not subject to income tax	8,974
Elimination of deferred tax account balances	27,052
Texas margin tax, net of federal income tax benefit	(208		)
Total income tax benefit	$	21,506

Debt (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Schedule of Debt

Long-term debt, affiliate, consists of the following at the dates indicated (in thousands):



	December 31,
	2013			2012

6.78% Note due 2019 – OTH	$	5,400		$	6,300
7.45% Note due 2019 – OTB	4,800			5,600
7.02% Note due 2020 – OTB	5,600			6,400
4.55% OTH $125.0 million Loan Agreement, due 2022	125,000			125,000
5.435% OTH $50.0 million Loan Agreement, due 2023	50,000			—
OILT Credit Agreement, due 2017	—			6,000
Total debt	190,800			149,300
Less current portion	(2,500		)	(2,500		)
Total long-term debt, affiliate	$	188,300		$	146,800

Schedule of Maturities of Long-term Debt

The following table presents the scheduled maturities of principal amounts of our debt obligations for the next five years and in total thereafter (in thousands):



	Years Ending
	December 31,

2014	$	2,500
2015	2,500
2016	2,500
2017	2,500
2018	2,500
Thereafter	178,300
Total	$	190,800

Partners' Capital and Distributions (Tables)

12 Months Ended

Dec. 31, 2013

Equity [Abstract]

Schedule of Cash Distributions Declared or Paid

The following table details the distributions paid during or pertaining to the years ended December 31, 2013, 2012 and 2011 (in thousands, except per unit amounts):



		Common and		General		Incentive				Distributions
	Date Paid	Subordinated		Partner’s		Distribution				per Limited
Date Declared	or To Be Paid	Units		2% Interest		Rights		Total		Partner Unit

October 20, 2011	November 14, 2011	$	10,418	$	212	$	—	$	10,630	$	0.2678
January 23, 2012	February 14, 2012	$	13,226	$	270	$	—	$	13,496	$	0.34
April 23, 2012	May 14, 2012	$	13,614	$	278	$	—	$	13,892	$	0.35
July 19, 2012	August 14, 2012	$	14,004	$	286	$	—	$	14,290	$	0.36
October 18, 2012	November 14, 2012	$	14,588	$	298	$	—	$	14,886	$	0.375
January 22, 2013	February 14, 2013	$	15,171	$	310	$	11	$	15,492	$	0.39
April 22, 2013	May 14, 2013	$	15,754	$	324	$	100	$	16,178	$	0.405
July 22, 2013	August 14, 2013	$	16,532	$	342	$	238	$	17,112	$	0.425
October 21, 2013	November 14, 2013	$	17,310	$	363	$	477	$	18,150	$	0.445
January 21, 2014	February 14, 2014	$	19,505	$	415	$	827	$	20,747	$	0.47

Schedule of Capital Units



	Target Quarterly Distribution Target Amount	Marginal Percentage Interest in Distributions
	Target Quarterly Distribution Target Amount	Unitholders	General Partner
Minimum quarterly distribution	$0.3375	98.0%	2.0%
First target distribution	above $0.3375 up to $0.38813	98.0%	2.0%
Second target distribution	above $0.38813 up to $0.42188	85.0%	15.0%
Third target distribution	above $0.42188 up to $0.50625	75.0%	25.0%
Thereafter	above $0.50625	50.0%	50.0%

The following is a reconciliation of our limited partner units outstanding for the periods indicated:



	Limited Partner Units
	Common	Subordinated	Total

Limited partner units outstanding at December 31, 2010	—	—	—
Units issued in exchange for contribution of net assets to OILT	7,949,901	19,449,901	27,399,802
Units issued in IPO on July 19, 2011	11,500,000	—	11,500,000
Limited partner units outstanding at December 31, 2011	19,449,901	19,449,901	38,899,802
Units issued in 2012	—	—	—
Limited partner units outstanding at December 31, 2012	19,449,901	19,449,901	38,899,802
Units issued in public offering in November 2013	2,600,000	—	2,600,000
Limited partner units outstanding at December 31, 2013	22,049,901	19,449,901	41,499,802

Earnings Per Limited Partner Unit (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the computation of basic and diluted earnings per limited partner unit for the periods indicated (amounts in thousands, except per unit data):



					July 19, 2011
	Year Ended				through
	December 31,				December 31,
	2013		2012		2011

Net income	$	117,063	$	62,645	$	62,397
Net income prior to IPO on July 19, 2011	—		—		(38,591		)
Net income subsequent to IPO on July 19, 2011	117,063		62,645		23,806

Less: General partner’s incentive distribution earned (1)	19,755		237		—
Less: General partner’s 2.0% ownership interest	2,341		1,252		476
Net income allocated to limited partners	$	94,967	$	61,156	$	23,330

Numerator for basic and diluted earnings per limited partner unit:
Allocation of net income among limited partner interests:
Net income allocable to common units	$	48,326	$	30,578	$	11,665
Net income allocable to subordinated units	46,641		30,578		11,665
Net income allocated to limited partners	$	94,967	$	61,156	$	23,330

Denominator:
Basic and diluted weighted average number of limited partner units outstanding:
Common units	19,735		19,450		19,450
Subordinated units	19,450		19,450		19,450

Basic and diluted net income per limited partner unit:
Common units	$	2.45	$	1.57	$	0.60
Subordinated units	$	2.40	$	1.57	$	0.60

____________

(1)

Medical Insurance and Postretirement Benefit Obligation (Tables)

12 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures

The following table presents our net periodic benefit costs for the period indicated (in thousands):



	Year Ended December 31,
	2011

Service cost	$	447
Interest cost	190
Amortization of unrecognized amounts:
Prior service cost	47
Net actuarial loss	11
Net periodic benefit costs	$	695

The following table presents changes in plan assets and benefit obligations recognized in other comprehensive income (loss) for the period indicated (in thousands):



	Year Ended December 31,
	2011

Current period net loss	$	(153	)
Amortization of prior service cost	47
Amortization of prior net actuarial loss	11
Total recognized in other comprehensive loss	(95		)
Net periodic postretirement benefit cost	(695		)
Total recognized in net periodic postretirement benefit cost
and other comprehensive income	$	(790	)

The assumptions used in determining net benefit cost were as follows for the period indicated:



	Year Ended December 31,
	2011

Weighted average expense assumptions:
Discount rate at the beginning of year	5.68%
Initial health care cost trend rate (1)	9.50%
Ultimate health care cost trend rate	5.00%
Number of years to reach ultimate trend	10

__________


(1)	Rate represents assumed medical cost trend rate for all employee costs. Drug costs have a trend rate of 8.5%.

Interest Expense (Tables)

12 Months Ended

Dec. 31, 2013

Other Income and Expenses [Abstract]

Schedule of Interest Expense

The following table presents the components of interest costs incurred for the periods indicated (in thousands):



	Year Ended December 31,
	2013			2012			2011

Related party interest expense	$	(9,509	)	$	(3,377	)	$	(6,032	)
Capitalized related party interest	2,140			1,749			619
Other	(24		)	(26		)	(25		)
Total interest expense	$	(7,393	)	$	(1,654	)	$	(5,438	)

Major Customers (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Revenue and Accounts Receivable by Major Customers by Reporting Segments

The following table presents the percentage of revenues and receivables associated with our significant customers for the periods indicated:



	% of Revenues						% of Receivables
	Year Ended December 31,						December 31,
	2013		2012		2011		2013		2012

Enterprise Products Partners L.P.	29	%	13	%	12	%	38	%	15	%
ExxonMobil Corporation	9	%	11	%	12	%	2	%	10	%
LyondellBasell Industries, N.V.	9	%	12	%	13	%	11	%	3	%
BP p.l.c.	8	%	16	%	15	%	6	%	18	%
Royal Dutch Shell plc	7	%	9	%	11	%	10	%	15	%
Total percentages associated with significant customers	62	%	61	%	63	%	67	%	61	%

Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2013

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

Supplemental cash flows and non-cash transactions were as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2013		2012		2011

Cash paid for interest of $9,369, $2,888 and $13,020 (net of capitalized interest) (1)	$	7,229	$	1,139	$	12,401
Cash taxes paid	943		1,210		1,686
Interest costs capitalized	2,140		1,749		619

Non-cash transactions:
Change in accounts payable related to capital expenditures	$	7,383	$	12,732	$	—
Distribution of certain land parcels and office building to OTA (2)	—		—		6,215
Distribution of certain accounts and notes receivable to OTA (2)	—		—		18,277
Transfer of postretirement plan obligation to OTA (including $1.7 million of accumulated other comprehensive loss) (2)	—		—		(8,824		)
Transfer of deferred compensation plan obligations to OTA (2)	—		—		(4,124		)
Transfer of deferred compensation plan assets to OTA (2)	—		—		4,010
Net deferred tax assets related to assets and liabilities transferred to OTA (2)	—		—		4,531
Cash distribution payable (3)	—		—		178

______________


(1)	2011 amount includes $6.4 million of fees incurred in connection with the repayment of indebtedness in connection with our IPO (see Note 8).

(2)

(3)

Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of Segment Reporting Information, by Segment

Revenues by service category are as follows for the periods indicated (in thousands):



	Year Ended December 31,
	2013		2012		2011

Storage service fees	$	120,245	$	97,591	$	87,794
Throughput fees	79,663		29,096		23,973
Ancillary service fees	11,042		8,810		5,610
Total revenues	$	210,950	$	135,497	$	117,377

Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Summarized quarterly financial data for the years ended December 31, 2013 and 2012 is set forth below (in thousands, except per unit amounts):



	First		Second		Third		Fourth
	Quarter		Quarter		Quarter		Quarter		Total
2013
Revenue	$	40,186	$	52,079	$	58,531	$	60,154	$	210,950
Operating income	21,234		31,378		35,774		37,114		125,500
Net income	20,192		29,476		32,883		34,512		117,063
Earnings per common unit – basic and diluted (1)	$	0.48	$	0.61	$	0.65	$	0.69	$	2.45
Earnings per subordinated unit – basic and diluted (1)	$	0.48	$	0.61	$	0.65	$	0.65	$	2.40

2012
Revenue	$	34,286	$	33,823	$	33,327	$	34,061	$	135,497
Operating income	16,192		17,033		15,471		16,006		64,702
Net income	15,939		16,621		14,907		15,178		62,645
Earnings per common unit – basic and diluted	$	0.40	$	0.41	$	0.38	$	0.38	$	1.57
Earnings per subordinated unit – basic and diluted	$	0.40	$	0.41	$	0.38	$	0.38	$	1.57

__________


(1)	The sum of the quarterly earnings per unit amounts do not equal the full year amounts due to rounding differences.

Organization (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Dec. 31, 2013	Nov. 22, 2013	Jul. 19, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Capital units
Partners capital common unit holder units outstanding	22,049,901			22,049,901	19,449,901	19,449,901	0
Partners capital subordinated unit holder units outstanding	19,449,901			19,449,901	19,449,901	19,449,901	0
Partners capital common unit holder units issued	22,049,901			22,049,901	19,449,901
Partners capital subordinated unit holder units issued	19,449,901			19,449,901	19,449,901
Proceeds from issuance or sale of equity			$ 231,200
Payments under notes payable, affiliate				$ 2,500	$ 2,500	$ 127,458
Loss on early extinguishment of debt				0	0	(6,382)
Distributions paid to partners				$ 66,932	$ 56,742	$ 96,082
Oiltanking finance b.v.
Capital units
Payments under notes payable, affiliate			119,500
Increase (decrease) related party interest payable			1,000
Loss on early extinguishment of debt			(6,400)
Distributions paid to partners			77,200
Payments of stock issuance costs			3,400
Payment of working capital provided by related party			$ 23,700
Public security holders
Capital units
Limited liability company (llc) or limited partnership (lp), limited partners and general partner, ownership interest	34.00%
Limited liability company (llc) or limited partnership (lp), members or limited partners, ownership interest	33.30%
OTA and its affiliates
Capital units
Limited liability company (llc) or limited partnership (lp), limited partners and general partner, ownership interest	66.00%
Limited liability company (llc) or limited partnership (lp), members or limited partners, ownership interest	64.70%
Limited partner
Capital units
Limited liability company (llc) or limited partnership (lp), members or limited partners, ownership interest	98.00%
OTA
Capital units
Partners capital common unit holder units outstanding	7,949,901			7,949,901
Partners capital subordinated unit holder units outstanding	19,449,901			19,449,901
Partners capital common unit holder units issued			7,949,901
Partners capital subordinated unit holder units issued			19,449,901
General partner
Capital units
Partners capital common unit holder units issued		2,600,000
Price per unit, sale of units		$ 61.65
Proceeds from issuance or sale of equity		$ 154,300
Limited liability company (llc) or limited partnership (lp), managing member or general partner, ownership interest	2.00%
General partners' contributed capital		$ 3,300
IPO
Capital units
Partners capital common unit holder units issued			11,500,000
Price per unit, sale of units			$ 21.50
IPO underwriters exercise of over allotment
Capital units
Offering costs, partnership interests			1,500,000

Summary of Significant Accounting Policies (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Dec. 31, 2013 shares	Jun. 30, 2013 USD ($)	Dec. 31, 2013 shares	Dec. 31, 2013 business_segments shares	Dec. 31, 2013 segments shares	Dec. 31, 2013 USD ($) shares	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)
Property, Plant and Equipment [Line Items]
Asset Impairment Charges						$ 0	$ 0	$ 0
Number of reportable segments \| business_segments				1
Number of operating segments				2	2
Interest costs capitalized						$ 2,140	$ 1,749	$ 619
U.S federal corporate statutory rate								35.00%
Deferred other tax expense (benefit)								$ 27,052
Emission Allowances [Member]
Property, Plant and Equipment [Line Items]
Finite-lived Intangible Assets Acquired		$ 3,700
Long-term incentive plan (LTIP)
Property, Plant and Equipment [Line Items]
Long-term incentive plan, number of shares authorized \| shares	3,889,980		3,889,980	3,889,980	3,889,980	3,889,980
Production and terminal facilities \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life			4 years
Production and terminal facilities \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life			40 years
Rights of way \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life			10 years
Rights of way \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life			15 years
General partner
Property, Plant and Equipment [Line Items]
Limited liability company (llc) or limited partnership (lp), managing member or general partner, ownership interest	2.00%

Related Party Transactions (Details) - USD ($)

1 Months Ended

12 Months Ended

Jul. 19, 2011

Aug. 31, 2013

Jan. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Revenues earned for related parties

$ 3,317,000

$ 3,225,000

$ 4,707,000

Related party accounts receivable

127,000

615,000

Accounts payable, affiliates

4,264,000

2,049,000

Accounts payable and accrued expenses, related party administrative fees

6,703,000

60,000

Long term debt related parties

190,800,000

Payments under notes payable, affiliate

2,500,000

127,458,000

557,000

611,000

Notes receivable, affiliate

100,000,000

28,000,000

Operating

15,129,000

12,997,000

4,795,000

Interest expense (net of amounts capitalized)

^[1]

17,908,000

15,952,000

10,622,000

7,368,000

1,628,000

5,413,000

Selling, general and administrative services, increase (decrease) In related party services agreement fee

6,382,000

Interest income

$ 30,000

33,000

42,000

$ 14,900,000

Sellling, general and administrative services, related party services agreement term

10 years

Sellling, general and administrative services, related party services agreement, automatic renewal term

12 months

Sellling, general and administrative services, related party services agreement, termination notice term

180 days

Storage and ancillary service fees

Revenues earned for related parties

$ 3,317,000

3,212,000

3,142,000

Other revenues

Revenues earned for related parties

13,000

1,565,000

Oiltanking gmbh

Capitalized engineering services

5,500,000

4,300,000

900,000

Oiltanking finance b.v.

Long term debt related parties

190,800,000

149,300,000

Payments under notes payable, affiliate

$ 119,500,000

600,000

Notes receivable, affiliate

$ 100,000,000

$ 28,000,000

Short-term notes receivable, related parties, weighted average interest rate

0.23%

0.15%

Oiltanking north america, llc

6,400,000

Selling, general and administrative services, related party services agreement fee

$ 18,800,000

$ 15,100,000

OTA | Maximum

Stock issuance, indemnification of environmental losses by related party, amount

15,000,000.0

OTA | Minimum

Stock issuance, indemnification of environmental losses by related party, amount

$ 500,000.0

OTA | Annual fixed fee

OTA | Invoicing and inventory computer system expense

6,600,000

$ 1,000,000

$ 1,100,000

300,000

General partner

Related party expenses, legal fees

$ 1,200,000

$ 1,100,000

$ 800,000

[1]

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2008
Property, Plant and Equipment, Net, by Type [Abstract]
Total property, plant and equipment	$ 805,381	$ 620,455
Less: accumulated depreciation	(219,555)	(202,166)
Total property, plant and equipment, net	585,826	418,289
Depreciation and amortization	20,407	15,901	$ 15,676
Capitalized interest included in construction in progress	2,140	1,749	619
Gain on property casualty indemnification	303	0	928
(Gain) loss on disposal of fixed assets	(329)	13	544
Property damage due to hurricane
Property, Plant and Equipment, Net, by Type [Abstract]
Gain on property casualty indemnification	300		$ 700
Property damage at dock at Beaumont terminal
Property, Plant and Equipment, Net, by Type [Abstract]
Gain on property casualty indemnification				$ 200
Land
Property, Plant and Equipment, Net, by Type [Abstract]
Total property, plant and equipment	23,436	23,340
Production and terminal facilities
Property, Plant and Equipment, Net, by Type [Abstract]
Total property, plant and equipment	661,184	460,239
Construction in progress
Property, Plant and Equipment, Net, by Type [Abstract]
Total property, plant and equipment	$ 120,761	$ 136,876

Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2013	Dec. 31, 2012
Accounts Payable and Accrued Expenses [Line Items]
Accounts payable, trade	$ 3,820	$ 7,891
Accrued capital expenditures	15,120	12,732
Accrued property taxes	6,952	4,987
Accrued sales and other taxes	421	207
Related party interest and commitment fees payable	557	611
Related party administrative fees payable	6,703	60
Deferred revenue	2,609	1,039
Other	1,922	1,872
Total accounts payable and accrued expenses	$ 38,104	$ 29,399

Deferred Revenue (Details) - USD ($) $ in Thousands	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2007
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	$ 2,609	$ 1,039
Leasing arrangement
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 1,400	1,600				$ 2,500
Deferred revenue, recognition term	16 years
Leasing arrangement \| Accounts payable and accrued expenses
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	$ 200	200
One-time payment received from the modification of a revenue agreement
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 1,100	1,400			$ 2,000
Deferred revenue, recognition term	9 years
One-time payment received from the modification of a revenue agreement \| Accounts payable and accrued expenses
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	$ 200	200
Up-front payment arrangement \| Accounts payable and accrued expenses
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current			$ 400	$ 400
Customer throughput and deficiency agreement \| Accounts payable and accrued expenses
Deferred Revenue Arrangement [Line Items]
Deferred revenue, current	$ 2,200	$ 600

Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income before income tax benefit			$ 40,891
U.S. federal corporate statutory rate			35.00%
Expected income tax expense			$ (14,312)
OILT, OTB and OTH income not subject to income tax			8,974
Elimination of deferred tax account balances			27,052
Texas margin tax, net of federal income tax benefit	$ (1,100)	$ (600)	(208)
Total income tax benefit	$ 1,087	$ 576	$ (21,506)

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Amount of other deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. For example, but not limited to, acquisition-date income tax benefits or expenses recognized from changes in the acquirer's valuation allowance for its previously existing deferred tax assets resulting from a business combination and adjustments to beginning-of-year balance of a valuation allowance because of a change in circumstance causing a change in judgment about the realizability of the related deferred tax asset in future periods.

+ References + Details

Debt (Details)				1 Months Ended	2 Months Ended	12 Months Ended
Debt (Details)	Jun. 26, 2013 USD ($)	May 16, 2012 USD ($)	Jul. 19, 2011 USD ($)	Nov. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2013 USD ($) debt_agreement	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jul. 31, 2013 USD ($)	Nov. 08, 2012 USD ($)	Nov. 07, 2012 USD ($)	Jun. 30, 2012 USD ($)
Schedule of long-term, affiliate [Abstract]
Total debt						$ 190,800,000
Less current portion					$ (2,500,000)	(2,500,000)	$ (2,500,000)
Total long-term debt, affiliate					146,800,000	188,300,000	146,800,000
Scheduled maturities of long-term debt, affiliate [Abstract]
2014						2,500,000
2015						2,500,000
2016						2,500,000
2017						2,500,000
2018						2,500,000
Thereafter						178,300,000
Payments under notes payable, affiliate						2,500,000	2,500,000	$ 127,458,000
Loss on extinguishment of debt						0	0	$ (6,382,000)
Debt covenant, distribution restriction amount						316,200,000
Oiltanking finance b.v.
Schedule of long-term, affiliate [Abstract]
Total debt					149,300,000	190,800,000	149,300,000
Scheduled maturities of long-term debt, affiliate [Abstract]
Payments under notes payable, affiliate			$ 119,500,000
Loss on extinguishment of debt			(6,400,000)
Increase (decrease) related party interest payable			$ 1,000,000
Notes payable, other payables \| Oiltanking finance b.v.
Schedule of long-term, affiliate [Abstract]
Total debt					149,300,000	190,800,000	149,300,000
Less current portion					(2,500,000)	(2,500,000)	(2,500,000)
Total long-term debt, affiliate					146,800,000	$ 188,300,000	146,800,000
Scheduled maturities of long-term debt, affiliate [Abstract]
Number of outstanding debt agreements \| debt_agreement						3
Number of outstanding debt agreements with debt covenants \| debt_agreement						2
Notes payable, other payables \| Oiltanking finance b.v. \| Ratio of net financial indebtedness to EBITDA
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, ratio						0.12
Notes payable, other payables \| Oiltanking finance b.v. \| Ratio of net financial indebtedness to EBITDA \| Maximum
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, ratio						3.75
Notes payable, other payables \| Oiltanking finance b.v. \| Ratio of EBITDA to total debt service
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, ratio						9.0
Notes payable, other payables \| Oiltanking finance b.v. \| Ratio of EBITDA to total debt service \| Minimum
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, ratio						1.2
Notes payable, other payables \| Oiltanking finance b.v. \| Ratio of stockholders' equity to non-current assets
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, percentage						97.10%
Notes payable, other payables \| Oiltanking finance b.v. \| Ratio of stockholders' equity to non-current assets \| Minimum
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, percentage						30.00%
Notes payable, other payables \| 6.78% Note due 2019 – OTH \| Oiltanking finance b.v.
Schedule of long-term, affiliate [Abstract]
Total debt					6,300,000	$ 5,400,000	6,300,000
Notes payable, other payables \| 7.45% Note due 2019 – OTB \| Oiltanking finance b.v.
Schedule of long-term, affiliate [Abstract]
Total debt					5,600,000	4,800,000	5,600,000
Notes payable, other payables \| 7.02% Note due 2020 – OTB \| Oiltanking finance b.v.
Schedule of long-term, affiliate [Abstract]
Total debt					6,400,000	$ 5,600,000	6,400,000
Unsecured debt \| Oiltanking finance b.v.
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt instrument, restrictive covenants, financial parameters' time period resulting in an event of default						30 days
Unsecured debt \| Oiltanking finance b.v. \| Ratio of net financial indebtedness to EBITDA
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, ratio						1.35
Unsecured debt \| Oiltanking finance b.v. \| Ratio of net financial indebtedness to EBITDA \| Maximum
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, ratio						3.75
Unsecured debt \| Oiltanking finance b.v. \| Ratio of EBITDA to total debt service
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, ratio						15.3
Unsecured debt \| Oiltanking finance b.v. \| Ratio of EBITDA to total debt service \| Minimum
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, ratio						1.2
Unsecured debt \| Oiltanking finance b.v. \| Ratio of stockholders' equity to non-current assets
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, percentage						60.20%
Unsecured debt \| Oiltanking finance b.v. \| Ratio of stockholders' equity to non-current assets \| Minimum
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, percentage						30.00%
Unsecured debt \| 4.55% OTH $125.0 million Loan Agreement, due 2022 \| Oiltanking finance b.v.
Schedule of long-term, affiliate [Abstract]
Total debt					$ 125,000,000	$ 125,000,000	$ 125,000,000
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt instrument, fee amount												$ 750,000
Debt instrument, face amount		$ 125,000,000.0
Line of credit facility, unused capacity, commitment fee percentage						1.00%
Debt instrument, term		10 years
Interest rate percentage					4.55%	4.55%	4.55%
Unsecured debt \| 4.55% OTH $125.0 million Loan Agreement, due 2022 \| Oiltanking finance b.v. \| Cost of funds
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt instrument, basis spread on variable rate						2.70%
Ten-year USD swap interest rate percentage						1.85%
Unsecured debt \| 5.435% OTH $50.0 million Loan Agreement, due 2023 \| Oiltanking finance b.v.
Schedule of long-term, affiliate [Abstract]
Total debt					$ 0	$ 50,000,000	$ 0		$ 50,000,000
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt instrument, fee amount									$ 200,000
Debt instrument, face amount	$ 50,000,000.0
Debt instrument, term	10 years
Interest rate percentage						5.435%
Unsecured debt \| 5.435% OTH $50.0 million Loan Agreement, due 2023 \| Oiltanking finance b.v. \| Cost of funds
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt instrument, basis spread on variable rate						2.60%
Ten-year USD swap interest rate percentage						2.835%
Line of credit \| Oiltanking finance b.v. \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Line of credit facility, current borrowing capacity										$ 150,000,000	$ 50,000,000
Line of credit facility, unused borrowing capacity amount						$ 75,000,000
Line of credit facility, maximum borrowing capacity						$ 225,000,000
Commitment fee percentage					0.35%
Debt instrument, fee amount											$ 500,000
Repayments of lines of credit				$ 56,000,000
Line of credit \| Oiltanking finance b.v. \| LIBOR \| Minimum \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt instrument, basis spread on variable rate						1.65%
Line of credit \| Oiltanking finance b.v. \| LIBOR \| Maximum \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt instrument, basis spread on variable rate						2.50%
Line of credit \| Oiltanking finance b.v. \| Ratio of net financial indebtedness to EBITDA \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, ratio						1.19
Line of credit \| Oiltanking finance b.v. \| Ratio of net financial indebtedness to EBITDA \| Maximum \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, ratio						3.75
Line of credit \| Oiltanking finance b.v. \| Ratio of EBITDA to total debt service \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, ratio						2.2
Line of credit \| Oiltanking finance b.v. \| Ratio of EBITDA to total debt service \| Minimum \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, ratio						1.2
Line of credit \| Oiltanking finance b.v. \| Ratio of stockholders' equity to non-current assets \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Debt covenant, percentage						83.50%
Line of credit \| Oiltanking finance b.v. \| Ratio of stockholders' equity to non-current assets \| Minimum \| Revolving credit facility
Scheduled maturities of long-term debt, affiliate [Abstract]
Required debt covenant, percentage						30.00%
Line of credit \| OILT Credit Agreement, due 2017 \| Revolving credit facility
Schedule of long-term, affiliate [Abstract]
Total debt					$ 6,000,000	$ 0	$ 6,000,000
Scheduled maturities of long-term debt, affiliate [Abstract]
Effective interest rate percentage					2.44%		2.44%

Partners' Capital and Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands																								1 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Feb. 14, 2014	Jan. 20, 2014	Dec. 31, 2013	Nov. 22, 2013	Nov. 14, 2013	Oct. 21, 2013	Aug. 14, 2013	Jul. 22, 2013	May 14, 2013	Apr. 22, 2013	Feb. 14, 2013	Jan. 22, 2013	Nov. 14, 2012	Oct. 18, 2012	Aug. 14, 2012	Jul. 19, 2012	May 14, 2012	Apr. 23, 2012	Feb. 14, 2012	Jan. 23, 2012	Nov. 14, 2011	Oct. 20, 2011	Jul. 19, 2011	Dec. 31, 2012	Dec. 31, 2011	Jul. 19, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners capital common unit holder units outstanding																										0	19,449,901	19,449,901	0
Partners capital subordinated unit holder units outstanding																										0	19,449,901	19,449,901	0
Limited partners' capital account, units outstanding																										0	38,899,802	38,899,802	0
Units issued in exchange for contribution of net assets to OILT																										7,949,901
Units issued in exchange for contribution of net assets to OILT																										19,449,901
Units issued in exchange for contribution of net assets to OILT																										27,399,802
Partners capital common unit, sale of units																							11,500,000				2,600,000	0
Partners capital subordinated unit, sale of units																							0				0	0
Partners' capital account, units, sale of units																							11,500,000				2,600,000	0
Partners capital common unit holder units outstanding			22,049,901																					19,449,901	19,449,901		22,049,901	19,449,901	19,449,901
Partners capital subordinated unit holder units outstanding			19,449,901																					19,449,901	19,449,901		19,449,901	19,449,901	19,449,901
Limited partners' capital account, units outstanding			41,499,802																					38,899,802	38,899,802		41,499,802	38,899,802	38,899,802
Partners capital common unit holder units issued			22,049,901																					19,449,901			22,049,901	19,449,901
Partners capital subordinated unit holder units issued			19,449,901																					19,449,901			19,449,901	19,449,901
Distribution made to member or limited partner distribution period			45 days																								45 days
Distributions declared						$ 17,310		$ 16,532		$ 15,754		$ 15,171		$ 14,588		$ 14,004		$ 13,614		$ 13,226		$ 10,418
Distribution made to general partner, distributions declared						363		342		324		310		298		286		278		270		212
Distribution made to member or limited partner, incentive distribution rights						477		238		100		11		0		0		0		0		0
Distribution made to member or limited partner and general partner, cash distributions declared						$ 18,150		$ 17,112		$ 16,178		$ 15,492		$ 14,886		$ 14,290		$ 13,892		$ 13,496		$ 10,630
Cash distribution to unitholders (in dollars per share)						$ 0.445		$ 0.425		$ 0.405		$ 0.39		$ 0.375		$ 0.36		$ 0.35		$ 0.34		$ 0.2678
Distributions declared					$ 17,310		$ 16,532		$ 15,754		$ 15,171		$ 14,588		$ 14,004		$ 13,614		$ 13,226		$ 10,418
General partners' capital account, period distribution amount					363		342		324		310		298		286		278		270		212
Partners capital account, incentive distribution rights					477		238		100		11		0		0		0		0		0
Cash distributions to partners					$ 18,150		$ 17,112		$ 16,178		$ 15,492		$ 14,886		$ 14,290		$ 13,892		$ 13,496		$ 10,630			$ 56,564	$ 10,630	$ 83,630	$ 66,932
Distribution made to member or limited partner, distributions paid, per unit					$ 0.445		$ 0.425		$ 0.405		$ 0.39		$ 0.375		$ 0.36		$ 0.35		$ 0.34		$ 0.2678
Target annualized distribution target amount (in dollars per share)			$ 2.025																								$ 2.025
Proceeds from issuance or sale of equity																							$ 231,200
Payments under notes payable, affiliate																											$ 2,500	$ 2,500	$ 127,458
Loss on early extinguishment of debt																											0	0	6,382
Distributions paid to partners																											$ 66,932	$ 56,742	$ 96,082
Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Minimum quarterly distribution on an annualized basis			1.35																								$ 1.35
Minimum quarterly distribution \| Upto the minimum quarterly distribution of $0.3375 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.3375																								0.3375
First target distribution \| Above $0.3375 up to $0.38813 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.3375																								0.3375
First target distribution \| Above $0.3375 up to $0.38813 \| Maximum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.38813																								0.38813
Second target distribution \| Above $0.3375 up to $0.38813 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.38813																								0.38813
Second target distribution \| Above $0.38813 up to $0.42188 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.38813																								0.38813
Second target distribution \| Above $0.38813 up to $0.42188 \| Maximum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.42188																								0.42188
Third target distribution \| Above $0.42188 up to $0.50625 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.42188																								0.42188
Third target distribution \| Above $0.42188 up to $0.50625 \| Maximum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			0.50625																								0.50625
Thereafter \| Above $0.50625 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			$ 0.50625																								$ 0.50625
General partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited liability company (llc) or limited partnership (lp), managing member or general partner, ownership interest			2.00%																						2.00%		2.00%
General partner \| Minimum quarterly distribution \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			2.00%																								2.00%
General partner \| First target distribution \| Above $0.3375 up to $0.38813
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			2.00%																								2.00%
General partner \| Second target distribution \| Above $0.38813 up to $0.42188
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			15.00%																								15.00%
General partner \| Third target distribution \| Above $0.42188 up to $0.50625
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			25.00%																								25.00%
General partner \| Thereafter \| Above $0.50625
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			50.00%																								50.00%
General partner \| Highest level - no subordinated units outstanding \| When No Subordinated Units are Outstanding and Incentive Distributions are Received at the Highest Level
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			48.00%																								48.00%
Limited partner \| Minimum quarterly distribution \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			98.00%																								98.00%
Limited partner \| First target distribution \| Above $0.3375 up to $0.38813
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			98.00%																								98.00%
Limited partner \| Second target distribution \| Above $0.38813 up to $0.42188
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			85.00%																								85.00%
Limited partner \| Third target distribution \| Above $0.42188 up to $0.50625
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			75.00%																								75.00%
Limited partner \| Thereafter \| Above $0.50625
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			50.00%																								50.00%
Limited Partners, Common Units \| First preference \| Upto the minimum quarterly distribution of $0.3375 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			$ 0.3375																								$ 0.3375
Limited Partners, Common Units \| General partner \| First preference \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			2.00%																								2.00%
Limited Partners, Common Units \| Limited partner \| First preference \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			98.00%																								98.00%
Limited Partners, Subordinated Units \| Second preference \| Upto the minimum quarterly distribution of $0.3375 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			$ 0.3375																								$ 0.3375
Limited Partners, Subordinated Units \| Third preference \| Upto the minimum quarterly distribution of $0.3375 \| Minimum
Increase (Decrease) in Partners' Capital [Roll Forward]
Target quarterly distribution target amount (in dollars per share)			$ 0.38813																								$ 0.38813
Limited Partners, Subordinated Units \| General partner \| Second preference \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			2.00%																								2.00%
Limited Partners, Subordinated Units \| General partner \| Third preference \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			2.00%																								2.00%
Limited Partners, Subordinated Units \| Limited partner \| Second preference \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			98.00%																								98.00%
Limited Partners, Subordinated Units \| Limited partner \| Third preference \| Upto the minimum quarterly distribution of $0.3375
Increase (Decrease) in Partners' Capital [Roll Forward]
Marginal percentage interest in distributions			98.00%																								98.00%
OTA
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners capital common unit holder units outstanding			7,949,901																								7,949,901
Partners capital subordinated unit holder units outstanding			19,449,901																								19,449,901
Partners capital common unit holder units issued																							7,949,901			7,949,901
Partners capital subordinated unit holder units issued																							19,449,901			19,449,901
General partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners capital common unit holder units issued				2,600,000
Limited liability company (llc) or limited partnership (lp), managing member or general partner, ownership interest			2.00%
Proceeds from issuance or sale of equity				$ 154,300
Price per unit, sale of units				$ 61.65
General partners' contributed capital				$ 3,300
IPO
Increase (Decrease) in Partners' Capital [Roll Forward]
Partners capital common unit holder units issued																							11,500,000			11,500,000
Price per unit, sale of units																							$ 21.50			$ 21.50
IPO underwriters exercise of over allotment
Increase (Decrease) in Partners' Capital [Roll Forward]
Offering costs, partnership interests																							1,500,000			1,500,000
Oiltanking finance b.v.
Increase (Decrease) in Partners' Capital [Roll Forward]
Payments under notes payable, affiliate																							$ 119,500
Increase (decrease) related party interest payable																							1,000
Loss on early extinguishment of debt																							6,400
Distributions paid to partners																							77,200
Payments of stock issuance costs																							3,400
Payment of working capital provided by related party																							$ 23,700
Subsequent Event [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
Distributions declared		$ 19,505
Distribution made to general partner, distributions declared		415
Distribution made to member or limited partner, incentive distribution rights		827
Distribution made to member or limited partner and general partner, cash distributions declared		$ 20,747
Cash distribution to unitholders (in dollars per share)		$ 0.47
Distributions declared	$ 19,505
General partners' capital account, period distribution amount	415
Partners capital account, incentive distribution rights	827
Cash distributions to partners	$ 20,747
Distribution made to member or limited partner, distributions paid, per unit	$ 0.47

Earnings Per Limited Partner Unit (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

1 Months Ended

3 Months Ended

5 Months Ended

7 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Jul. 19, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Net income prior to IPO on July 19, 2011

$ 62,645

$ 34,512

$ 32,883

$ 29,476

$ 20,192

$ 15,178

$ 14,907

$ 16,621

$ 15,939

$ 23,806

$ 62,397

$ 117,063

$ 62,645

$ 62,397

$ (38,591)

38,591

Net income subsequent to IPO on July 19, 2011

23,806

117,063

62,645

23,806

Net income allocated to limited partners

22,096

^[1]

1,489

^[1]

476

23,330

94,967

61,156

Allocation of net income among limited partner interests:

Net income allocated to common unitholders

11,665

48,326

^[1]

30,578

^[1]

11,665

Net income allocated to subordinated unitholders

$ 11,665

$ 46,641

^[1]

$ 30,578

^[1]

$ 11,665

Basic and diluted weighted average number of limited partner units outstanding:

Common units

19,450

19,735

19,450

Subordinated units

19,450

Basic and diluted net income per limited partner unit:

Common units (in dollars per share)

$ 0.69

$ 0.65

$ 0.61

$ 0.48

$ 0.38

$ 0.41

$ 0.40

$ 0.60

$ 2.45

^[1]

$ 1.57

^[1]

$ 0.60

Subordinated units (in dollars per share)

$ 0.65

$ 0.61

$ 0.48

$ 0.38

$ 0.41

$ 0.40

$ 0.60

$ 2.40

^[1]

$ 1.57

^[1]

$ 0.60

General partner's incentive distribution earned

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

General partner's 2.0% ownership interest

^[2]

$ 0

$ 19,755

$ 237

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

$ 476

$ 2,341

$ 1,252

General partner

Limited liability company (llc) or limited partnership (lp), managing member or general partner, ownership interest

2.00%

[1]

Amounts attributable to 2011 are reflective of general and limited partner interest in net income subsequent to the closing of the Partnership’s initial public offering on July 19, 2011.

[2]

Employee Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Employee Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2011	Jun. 30, 2011
Compensation and Retirement Disclosure [Abstract]
Defined contribution plan, service commitment period		6 months
Contributions to the retirement plan, discretionary	$ 0.8
Accrued compensation to participants	0.1
Deferred compensation payments	0.2
Employee deferrals	$ 0.4

Medical Insurance and Postretirement Benefit Obligation (Details) - USD ($)
$ in Thousands

5 Months Ended

12 Months Ended

Jun. 01, 2011

Dec. 31, 2011

Amortization of unrecognized amounts:

Changes in plan assets and benefit obligations recognized in other comprehensive income (loss)

$ (695)

Current period net loss

(153)

Amortization of prior service cost

Amortization of prior net actuarial loss

Total recognized in other comprehensive loss

(95)

Total recognized in net periodic postretirement benefit cost and other comprehensive income

(695)

$ (790)

Weighted average expense assumptions:

Discount rate at the beginning of year

5.68%

Initial health care cost trend rate (1)

^[1]

9.50%

Ultimate health care cost trend rate

5.00%

Number of years to reach ultimate trend

10 years

Drug care cost trend rate

8.50%

Amortization of unrecognized amounts:

Net periodic benefit costs

Service cost

$ 447

Interest cost

190

Prior service cost

Net actuarial loss

Changes in plan assets and benefit obligations recognized in other comprehensive income (loss)

(695)

Postemployment benefits limit of aggregate claims per year, maximum - minimum [Member]

$ (695)

Defined Benefit Plan Disclosure [Line Items]

Postemployment claims limit

$ 3,000

Postemployment benefits limit of aggregate claims per year, maximum - maximum [Member]

Defined Benefit Plan Disclosure [Line Items]

Postemployment claims limit

$ 4,000

[1]	Rate represents assumed medical cost trend rate for all employee costs. Drug costs have a trend rate of 8.5%.

Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Interest Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Expense [Abstract]
Related party interest expense	$ (9,509)	$ (3,377)	$ (6,032)
Capitalized related party interest	2,140	1,749	619
Other	(24)	(26)	(25)
Total interest expense	$ 7,393	$ 1,654	$ 5,438

Major Customers (Details)	12 Months Ended
Major Customers (Details)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Percentage of Revenue and Accounts Receivable by Major Customer [Line Items]
Percentage of Revenues	62.00%	61.00%	63.00%
Percentage of Receivables	67.00%	61.00%
BP p.l.c.
Percentage of Revenue and Accounts Receivable by Major Customer [Line Items]
Percentage of Revenues	8.00%	16.00%	15.00%
Percentage of Receivables	6.00%	18.00%
LyondellBasell Industries, N.V.
Percentage of Revenue and Accounts Receivable by Major Customer [Line Items]
Percentage of Revenues	9.00%	12.00%	13.00%
Percentage of Receivables	11.00%	3.00%
Enterprise Products Partners L.P.
Percentage of Revenue and Accounts Receivable by Major Customer [Line Items]
Percentage of Revenues	29.00%	13.00%	12.00%
Percentage of Receivables	38.00%	15.00%
Exxon Mobil Corporation
Percentage of Revenue and Accounts Receivable by Major Customer [Line Items]
Percentage of Revenues	9.00%	11.00%	12.00%
Percentage of Receivables	2.00%	10.00%
Royal Dutch Shell plc
Percentage of Revenue and Accounts Receivable by Major Customer [Line Items]
Percentage of Revenues	7.00%	9.00%	11.00%
Percentage of Receivables	10.00%	15.00%

Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands

1 Months Ended

3 Months Ended

5 Months Ended

7 Months Ended

12 Months Ended

Nov. 14, 2013

Oct. 21, 2013

Aug. 14, 2013

Jul. 22, 2013

May 14, 2013

Apr. 22, 2013

Feb. 14, 2013

Jan. 22, 2013

Nov. 14, 2012

Oct. 18, 2012

Aug. 14, 2012

Jul. 19, 2012

May 14, 2012

Apr. 23, 2012

Feb. 14, 2012

Jan. 23, 2012

Nov. 14, 2011

Oct. 20, 2011

Dec. 31, 2012

Jul. 31, 2011

Jan. 31, 2011

Mar. 31, 2012

Dec. 31, 2011

Jul. 19, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Other Significant Noncash Transactions

Cash paid for interest (net of capitalized interest)

^[1]

$ 7,229

$ 1,139

$ 12,401

Cash taxes paid

943

1,210

1,686

Interest costs capitalized

2,140

1,749

619

Change in accounts payable related to capital expenditures

7,383

12,732

Cash distributions to partners

(6,382)

$ 18,150

$ 17,112

$ 16,178

$ 15,492

$ 14,886

$ 14,290

$ 13,892

$ 13,496

$ 10,630

$ 56,564

$ 10,630

$ 83,630

66,932

Distributions declared

$ 17,310

$ 16,532

$ 15,754

$ 15,171

$ 14,588

$ 14,004

$ 13,614

$ 13,226

$ 10,418

Distributions paid

$ 2,000

$ 200

Interest Paid

9,369

2,888

13,020

OTA

Cash distributions to partners

85,500

Distributions declared

$ 2,000

Distributions paid

$ 83,400

Distribution made to member or limited partner, cash distributions paid using proceeds from the public issuance of common units

$ 77,000

OTA | Accounts payable related party, current

Dividends payable recorded in accounts payable, affiliates

$ 200

200

Distribution of certain land parcels and office buildings to OTA

Distribution of certain accounts and notes receivable to OTA

^[2]

6,215

Transfer of postretirement plan obligation to OTA

^[2]

18,277

Non-cash transaction, obligation given

^[2]

(8,824)

Transfer of deferred compensation plan obligations to OTA

Non-cash transaction, obligation given

^[2]

(4,124)

Transfer of deferred compensation plan assets to OTA

Net deferred tax assets related to assets and liabilities transferred to OTA

^[2]

4,010

Cash Distribution Payable

^[2]

4,531

Accumulated Other Comprehensive Income (Loss), Transfer of Postretirement Plan Obligation [Member]

^[3]

$ 0

178

Non-cash transaction, obligation given

$ (1,700)

[1]	2011 amount includes $6.4 million of fees incurred in connection with the repayment of indebtedness in connection with our IPO (see Note 8).
[2]	In connection with our IPO, OTH and OTB made non-cash distributions to OTA, consisting of certain land parcels, an office building and other property and equipment, certain accounts receivable and notes receivable, affiliate. In addition, the postretirement benefit and deferred compensation plans and obligations and certain assets to be used to fund the deferred compensation plan obligations were transferred to OTA. Related net deferred tax assets were also transferred to OTA.
[3]	At December 31, 2011, we had an accrued pre-IPO distribution to OTA of $0.2 million, which was reflected in accounts payable, affiliates, and such amount was paid to OTA in the first quarter of 2012. During the year ended December 31, 2011, we paid pre-IPO distributions to OTA of $85.5 million, consisting of: (i) $2.0 million, which had been declared during December 2010 and paid in January 2011, and was included in accounts payable, affiliates at December 31, 2011, and (ii) $83.4 million, which was paid to OTA in July 2011, $77.0 million of which was paid using proceeds from the public issuance of common units.

Segment Reporting (Details) $ in Thousands	3 Months Ended								12 Months Ended
Segment Reporting (Details) $ in Thousands	Dec. 31, 2013 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2012 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2013 business_segments	Dec. 31, 2013 segments	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments									2	2
Number of reportable segments \| business_segments									1
Total revenues	$ 60,154	$ 58,531	$ 52,079	$ 40,186	$ 34,061	$ 33,327	$ 33,823	$ 34,286			$ 210,950	$ 135,497	$ 117,377
Storage service fees
Segment Reporting Information [Line Items]
Total revenues											120,245	97,591	87,794
Throughput fees
Segment Reporting Information [Line Items]
Total revenues											79,663	29,096	23,973
Ancillary service fees
Segment Reporting Information [Line Items]
Total revenues											$ 11,042	$ 8,810	$ 5,610

Commitments and Contingencies Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2013 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed	$ 10.9

Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands

1 Months Ended

3 Months Ended

5 Months Ended

7 Months Ended

12 Months Ended

Dec. 31, 2012

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Jul. 19, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Quarterly Financial Information Disclosure [Abstract]

Revenue, Net

$ 60,154

$ 58,531

$ 52,079

$ 40,186

$ 34,061

$ 33,327

$ 33,823

$ 34,286

$ 210,950

$ 135,497

$ 117,377

Operating income

37,114

35,774

31,378

21,234

16,006

15,471

17,033

16,192

125,500

64,702

52,238

Basic and diluted net income per limited partner unit, common units (in dollars per share)

$ 62,645

$ 34,512

$ 32,883

$ 29,476

$ 20,192

$ 15,178

$ 14,907

$ 16,621

$ 15,939

$ 23,806

$ 62,397

$ 117,063

$ 62,645

$ 62,397

$ 0.69

$ 0.65

$ 0.61

$ 0.48

$ 0.38

$ 0.41

$ 0.40

$ 0.60

$ 2.45

^[1]

$ 1.57

^[1]

$ 0.60

Basic and diluted net income per limited partner unit, subordinated units (in dollars per share)

$ 0.65

$ 0.61

$ 0.48

$ 0.38

$ 0.41

$ 0.40

$ 0.60

$ 2.40

^[1]

$ 1.57

^[1]

$ 0.60

[1]	Amounts attributable to 2011 are reflective of general and limited partner interest in net income subsequent to the closing of the Partnership’s initial public offering on July 19, 2011.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

Label	Element	Value
Pre-Formation [Member] \| General Partner [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss
Pre-Formation [Member] \| Limited Partner [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss
Pre-Formation [Member] \| Accumulated Other Comprehensive Income (Loss) [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss
Post-Formation [Member] \| General Partner [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions	1,132,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	1,489,000
Post-Formation [Member] \| Limited Partners, Common Units [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions	27,716,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	30,578,000
Post-Formation [Member] \| Limited Partners, Subordinated Units [Member]
Partners' Capital Account, Distributions	us-gaap_PartnersCapitalAccountDistributions	27,716,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	$ 30,578,000

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.