6-K/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K/A

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2015

Commission file number 1-33198

TEEKAY OFFSHORE PARTNERS L.P.

(Exact name of Registrant as specified in its charter)

4^th Floor, Belvedere Building, 69 Pitts Bay Road, Hamilton, HM 08, Bermuda

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  x                    Form 40-F  ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1).

Yes  ¨                     No  x

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7).

Yes  ¨                     No  x

EXPLANATORY NOTE

This Amendment No. 1 to the Report on Form 6-K for the quarter ended June 30, 2015, originally filed with the Securities and Exchange Commission on August 17, 2015 (the “Form 6-K”), is being filed solely for the purposes of furnishing Interactive Data File disclosure as Exhibit 101 in accordance with Rule 405 of Regulation S-T. This Exhibit was not previously filed.

Other than as expressly set forth above, this Form 6-K/A does not, and does not purport to, amend, update or restate the information in any other item of the Form 6-K, or reflect any events that have occurred after the Form 6-K was originally filed. Pursuant to Rule 406T of Regulation S-T, the Interactive Data Files on Exhibit 101 hereto are deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act of 1933, as amended, are deemed not filed for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, and otherwise are not subject to liability under those sections.

Item 6. Exhibits

Exhibit Number

Description

101

The following financial information from Teekay Offshore Partners L.P.’s Report on Form 6-K for the quarter ended June 30, 2015, filed with the SEC on August 17, 2015, formatted in Extensible Business Reporting Language (XBRL): (i)     Unaudited Consolidated Statements of Income (Loss) and Comprehensive Income (Loss) for the three and six months ended June 30, 2015 and 2014; (ii)    Unaudited Consolidated Balance Sheets as at June 30, 2015 and December 31, 2014; (iii)  Unaudited Consolidated Statements of Cash Flows for the six months ended June 30, 2015 and 2014; (iv)   Unaudited Consolidated Statement of Changes In Total Equity for the six months ended June 30, 2015; and (v)    Notes to the Unaudited Consolidated Financial Statements.

THIS REPORT ON FORM 6-K IS HEREBY INCORPORATED BY REFERENCE INTO THE FOLLOWING REGISTRATION STATEMENTS OF THE PARTNERSHIP:

• REGISTRATION STATEMENT ON FORM S-8 (NO. 333-147682) FILED WITH THE SEC ON NOVEMBER 28, 2007

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-175685) FILED WITH THE SEC ON JULY 21, 2011

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-178620) FILED WITH THE SEC ON DECEMBER 19, 2011

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-183225) FILED WITH THE SEC ON AUGUST 10, 2012

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-188393) FILED WITH THE SEC ON MAY 7, 2013

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-188543) FILED WITH THE SEC ON MAY 10, 2013

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-193301) FILED WITH THE SEC ON JANUARY 10, 2014

• REGISTRATION STATEMENT ON FORM F-3ASR (NO. 333-196098) FILED WITH THE SEC ON MAY 20, 2014

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-197053) FILED WITH THE SEC ON JUNE 26, 2014

• REGISTRATION STATEMENT ON FORM F-3 (NO. 333-206461) FILED WITH THE SEC ON AUGUST 19, 2015

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	TEEKAY OFFSHORE PARTNERS L.P.
	By:	Teekay Offshore GP L.L.C., its general partner
Date: August 28, 2015	By:	/s/ Peter Evensen
		Peter Evensen
		Chief Executive Officer and Chief Financial Officer (Principal Financial and Accounting Officer)

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Long-Term Debt - Additional Information - Revolvers (Detail) - Jun. 30, 2015	USD ($) CreditFacility
Debt Instrument [Line Items]
Amount reduced under revolving credit facilities, remainder of 2015	$ 164,000,000
Amount reduced under revolving credit facilities, 2016	441,300,000
Amount reduced under revolving credit facilities, 2017	457,000,000
Amount reduced under revolving credit facilities, 2018	476,100,000
Amount reduced under revolving credit facilities, 2019	$ 602,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Number of long-term revolving credit facilities | CreditFacility	6
Revolving credit facilities borrowing capacity	$ 560,500,000
Revolving credit facilities fully drawn	560,500,000
Amount reduced under revolving credit facilities, remainder of 2015	70,500,000
Amount reduced under revolving credit facilities, 2016	203,700,000
Amount reduced under revolving credit facilities, 2017	102,800,000
Amount reduced under revolving credit facilities, 2018	136,200,000
Amount reduced under revolving credit facilities, 2019	$ 47,300,000
Debt instrument collateral, description	The revolving credit facilities are collateralized by first-priority mortgages granted on 20 of the Partnership's vessels, together with other related security.
Revolving Credit Facility [Member] | Guaranteed by Partnership and Subsidiaries [Member]
Debt Instrument [Line Items]
Number of long-term revolving credit facilities | CreditFacility	4
Minimum liquidity required by revolving credit facility covenants descriptions	Four of the revolving credit facilities are guaranteed by the Partnership and certain of its subsidiaries for all outstanding amounts and contain covenants that require the Partnership to maintain the greater of a minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) of at least $75.0 million and 5.0% of the Partnership's total consolidated debt.
Minimum level of free cash be maintained as per loan agreements	$ 75,000,000
Revolving Credit Facility [Member] | Guaranteed by Partnership and Subsidiaries [Member] | Minimum [Member]
Debt Instrument [Line Items]
Free liquidity and undrawn revolving credit line as percentage of debt	5.00%
Revolving Credit Facility [Member] | Guaranteed by Teekay Corporation [Member]
Debt Instrument [Line Items]
Number of long-term revolving credit facilities | CreditFacility	2
Minimum liquidity required by revolving credit facility covenants descriptions	Two revolving credit facilities are guaranteed by Teekay Corporation and contain covenants that require Teekay Corporation to maintain the greater of a minimum liquidity (cash and cash equivalents) of at least $50.0 million and 5.0% of Teekay Corporation's total consolidated debt which has recourse to Teekay Corporation.
Minimum level of free cash be maintained as per loan agreements	$ 50,000,000
Revolving Credit Facility [Member] | Guaranteed by Teekay Corporation [Member] | Minimum [Member]
Debt Instrument [Line Items]
Free liquidity and undrawn revolving credit line as percentage of debt	5.00%

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Derivative Instruments and Hedging Activities - Effect of Gain (Loss) on Cross Currency Swaps on Consolidated Statements of Income (Loss) (Detail) - Foreign Exchange and Other Derivative Financial Instruments [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on currency swaps	$ 10,572	$ (14,305)	$ (24,009)	$ (6,714)
Cross currency swaps agreements [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized losses	(1,953)	(38)	(4,333)	(22)
Unrealized gains (losses)	$ 12,525	$ (14,267)	$ (19,676)	$ (6,692)

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Derivative Instruments and Hedging Activities - Summary of Cross Currency Swaps (Detail) - Jun. 30, 2015 - Cross currency swaps agreements [Member]	NOK	USD ($)
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability)		$ (140,557,000)
Maturing In January Two Thousand Seventeen [Member]
Derivative [Line Items]
Notional Amount	NOK 600,000,000	$ 101,351,000
Floating Rate Receivable Reference Rate	NIBOR
Floating Rate Receivable Reference Margin	5.75%	5.75%
Fixed Rate Payable	7.49%	7.49%
Remaining Term (years)	1 year 7 months 6 days
Maturing In January Two Thousand Sixteen [Member]
Derivative [Line Items]
Notional Amount	NOK 500,000,000	$ 89,710,000
Floating Rate Receivable Reference Rate	NIBOR
Floating Rate Receivable Reference Margin	4.00%	4.00%
Fixed Rate Payable	4.94%	4.94%
Remaining Term (years)	7 months 6 days
Maturing In January Two Thousand Eighteen [Member]
Derivative [Line Items]
Notional Amount	NOK 800,000,000	$ 143,536,000
Floating Rate Receivable Reference Rate	NIBOR
Floating Rate Receivable Reference Margin	4.75%	4.75%
Fixed Rate Payable	6.07%	6.07%
Remaining Term (years)	2 years 7 months 6 days
Maturing In January Two Thousand Nineteen [Member]
Derivative [Line Items]
Notional Amount	NOK 1,000,000,000	$ 162,200,000
Floating Rate Receivable Reference Rate	NIBOR
Floating Rate Receivable Reference Margin	4.25%	4.25%
Fixed Rate Payable	6.42%	6.42%
Remaining Term (years)	3 years 7 months 6 days
Maturing in 2017 [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability)		$ (28,252,000)
Maturing in 2016 [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability)		(26,776,000)
Maturing in 2018 [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability)		(44,925,000)
Maturing In Two Thousand Nineteen [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability)		$ (40,604,000)

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Investment in Equity Accounted Joint Ventures and Advances to Joint Venture - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended
	Oct. 31, 2014	Dec. 31, 2014	Jun. 30, 2013
Libra JV [Member]
Schedule of Equity Method Investments [Line Items]
Loan facility	$ 248.0
Loan facility, maturity date	Oct. 31, 2015
Percentage guaranteed, loan facility	50.00%
Advances to joint venture		$ 5.2
Libra JV [Member] | Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Marginal rate added for interest paid	2.00%
Libra JV [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Marginal rate added for interest paid	2.65%
Odebrecht Oil And Gas Sa [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in joint venture	50.00%
Odebrecht Oil And Gas Sa [Member] | FPSO Units [Member] | Teekay Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of interest in joint venture			50.00%

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Income Taxes - Components of Provision for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Current	$ (271)	$ (415)	$ (627)	$ (1,668)
Deferred	(82)	233	(571)	223
Income tax expense	$ (353)	$ (182)	$ (1,198)	$ (1,445)

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Related Party Transactions and Balances - Revenues (Expenses) from Related Party Transactions (Parenthetical) (Detail) - Jun. 30, 2014 - USD ($) $ in Millions	Total	Total
ALP Maritime Services B.V. [Member]
Related Party Transaction [Line Items]
Business development fee	$ 1.6	$ 1.6

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Financial Instruments - Changes in Fair Value for Partnership's Contingent Consideration Liability Measured Recurring Basis Using Significant Unobservable Inputs (Level 3) (Detail) - Jun. 30, 2015 - Contingent Consideration [Member] - Logitel Offshore Holding [Member] - USD ($) $ in Thousands	Total	Total
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance at beginning of period	$ (21,562)	$ (21,448)
Settlement of liability	3,540	3,540
Adjustment to liability	2,569	2,569
Unrealized gain included in Other income - net	161	47
Balance at end of period	$ (15,292)	$ (15,292)

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Commitments and Contingencies - Additional Information - Statoil (Detail) $ in Thousands	1 Months Ended	6 Months Ended
	May. 31, 2013 USD ($) ExtensionOptions	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Payments made towards commitments		$ 34,503	$ 30,211
Randgrid shuttle tanker [Member]
Loss Contingencies [Line Items]
Percentage of currently owned interest	67.00%
Expected cost of project	$ 273,000
Operating lease arrangement period, lessor		3 years
Additional term of contract		1 year
Number of extension options | ExtensionOptions	12
Payments made towards commitments		$ 84,600
Payments due in the remainder of 2015		76,400
Payments due in the year 2016		110,400
Payments due in the year 2017		$ 1,400

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Subsequent Events - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2015 USD ($) Vessel $ / shares	Jun. 30, 2015
Petrojarl Knarr Fpso [Member]
Subsequent Event [Line Items]
Operating lease arrangement period, lessor		6 years
Subsequent Event [Member] | Shuttle Tanker [Member]
Subsequent Event [Line Items]
Number of vessels | Vessel	3
Subsequent Event [Member] | Petrojarl Knarr Fpso [Member]
Subsequent Event [Line Items]
Acquisition financing	$ 745
Subsequent Event [Member] | Petrojarl Knarr Fpso [Member] | Long-term Debt [Member]
Subsequent Event [Line Items]
Debt facility, tranches description	Five-tranches with varying maturity dates from 2020 through 2026
Final bullet payments	$ 40
Frequency of payments	Semi-annual payments
Debt instrument collateral, description	Collateralized by a first-priority mortgage over the Petrojarl Knarr FPSO unit and is guaranteed by the Partnership.
Subsequent Event [Member] | Petrojarl Knarr Fpso [Member] | Convertible promissory note [Member]
Subsequent Event [Line Items]
Outstanding principal balance of convertible debt	$ 300
Debt instrument conversion price | $ / shares	$ 20.83
Debt conversion, description	Conversion of $300 million of the outstanding principal balance on the note into the Partnership's common units at a price of $20.83 per common unit.
Subsequent Event [Member] | Series C Preferred Units [Member]
Subsequent Event [Line Items]
Preferred units dividend rate	8.60%
Preferred stock conversion basis	Series C Preferred Units are convertible into the Partnership's common units on a one-for-one basis at any time after 18 months at a price of $23.95 per unit. The Series C Preferred Units are also redeemable upon certain events.
Subsequent Event [Member] | Series C Preferred Units [Member] | Private Placement [Member]
Subsequent Event [Line Items]
Net proceeds from private placement	$ 250
Units issued, price per share | $ / shares	$ 23.95
Subsequent Event [Member] | Common Stock Class Undefined [Member]
Subsequent Event [Line Items]
Conversion price, per share | $ / shares	$ 23.95
Subsequent Event [Member] | Teekay Corporation [Member] | Petrojarl Knarr Fpso [Member]
Subsequent Event [Line Items]
Expected cost of project	$ 1,260
Subsequent Event [Member] | Teekay Corporation [Member] | Petrojarl Knarr Fpso [Member] | Convertible promissory note [Member]
Subsequent Event [Line Items]
Acquisition financing	492
Repayment of debt	$ 92

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Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2015

Segment Reporting [Abstract]

Segment Results as Presented in Consolidated Financial Statements

The following table includes results for the Partnership’s shuttle tanker segment; floating production, storage and off-loading (or FPSO) unit segment; floating storage and off-take (or FSO) unit segment; conventional tanker segment; towage segment; and UMS segment for the periods presented in these consolidated financial statements.

Three months ended June 30, 2015	Shuttle Tanker Segment			FPSO Segment			FSO Segment			Conventional Tanker Segment			Towage Segment			UMS Segment (1)			Total
Revenues		132,899			86,246			14,165			8,245			10,517			3,686			255,758
Voyage expenses		(18,976	)		—			(89	)		(647	)		(1,004	)		—			(20,716	)
Vessel operating expenses		(31,120	)		(33,557	)		(6,921	)		(1,514	)		(3,697	)		(1,126	)		(77,935	)
Time-charter hire expense		(10,762	)		—			—			—			—			—			(10,762	)
Depreciation and amortization		(26,795	)		(19,844	)		(2,975	)		(1,675	)		(2,174	)		(401	)		(53,864	)
General and administrative (2)		(6,788	)		(5,011	)		(420	)		(507	)		(837	)		(639	)		(14,202	)
Write down of vessel		—			—			—			—			—			(500	)		(500	)
Restructuring charge		(135	)		—			—			—			—			—			(135	)
Income from vessel operations		38,323			27,834			3,760			3,902			2,805			1,020			77,644
Three months ended June 30, 2014	Shuttle Tanker Segment			FPSO Segment			FSO Segment			Conventional Tanker Segment			Towage Segment			Total
Revenues		137,042			83,984			11,673			8,600			103			241,402
Voyage expenses		(24,913	)		—			(149	)		(1,188	)		(6	)		(26,256	)
Vessel operating expenses		(39,715	)		(39,472	)		(7,532	)		(1,465	)		—			(88,184	)
Time-charter hire expense		(4,975	)		—			—			—			—			(4,975	)
Depreciation and amortization		(27,378	)		(18,186	)		(1,298	)		(1,612	)		—			(48,474	)
General and administrative (2)		(6,532	)		(7,989	)		(1,027	)		(312	)		(2,194	)		(18,054	)
Restructuring recovery (3)		821			—			—			—			—			821
Income (loss) from vessel operations		34,350			18,337			1,667			4,023			(2,097	)		56,280
Six months ended June 30, 2015	Shuttle Tanker Segment			FPSO Segment			FSO Segment			Conventional Tanker Segment			Towage Segment			UMS Segment (1)			Total
Revenues		270,989			170,449			28,651			16,307			16,587			3,686			506,669
Voyage expenses		(38,505	)		—			(221	)		(1,215	)		(3,292	)		—			(43,233	)
Vessel operating expenses		(65,437	)		(64,790	)		(13,280	)		(2,888	)		(4,448	)		(1,126	)		(151,969	)
Time-charter hire expense		(17,083	)		—			—			—			(662	)		—			(17,745	)
Depreciation and amortization		(55,162	)		(39,939	)		(5,895	)		(3,349	)		(2,722	)		(401	)		(107,468	)
General and administrative (2)		(15,187	)		(9,813	)		(1,030	)		(759	)		(1,147	)		(1,146	)		(29,082	)
(Write down) and gain on sale of vessel		(13,853	)		—			—			—			—			(500	)		(14,353	)
Restructuring charge		(135	)		—			—			—			—			—			(135	)
Income from vessel operations		65,627			55,907			8,225			8,096			4,316			513			142,684
Six months ended June 30, 2014	Shuttle Tanker Segment			FPSO Segment (5)			FSO Segment			Conventional Tanker Segment			Towage Segment			Total
Revenues		290,222			167,121			25,962			17,228			103			500,636
Voyage expenses		(56,619	)		—			(172	)		(2,913	)		(6	)		(59,710	)
Vessel operating expenses		(80,121	)		(79,863	)		(13,405	)		(2,925	)		—			(176,314	)
Time-charter hire expense		(16,387	)		—			—			—			—			(16,387	)
Depreciation and amortization		(54,659	)		(36,089	)		(2,991	)		(3,223	)		—			(96,962	)
General and administrative (2)(4)		(13,142	)		(13,747	)		(1,886	)		(845	)		(3,283	)		(32,903	)
Restructuring recovery (3)		262			—			—			—			—			262
Income (loss) from vessel operations		69,556			37,422			7,508			7,322			(3,186	)		118,622

(1) The Partnership acquired 100% of the outstanding shares of Logitel during the third quarter of 2014 (see notes 3a and 12b).

(2) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources).

(3) Restructuring recovery of $0.8 million for the three and six months ended June 30, 2014 related to a reimbursement received during the second quarter of 2014, for the reorganization of the Partnership’s shuttle tanker marine operations, which were completed during 2013. Restructuring charge of $0.6 million for the six months ended June 30, 2014 related to the reflagging of one shuttle tanker which commenced in January 2014 and was completed in March 2014.

(4) Includes a $1.6 million business development fee to Teekay Corporation in connection with the acquisition of ALP Maritime Services B.V. (or ALP), for the six months ended June 30, 2014 in the towage segment (see notes 6b and 12a ).

(5) Income from vessel operations for the six months ended June 30, 2014 excludes $3.1 million of the Voyageur Spirit FPSO unit indemnification payments received by the Partnership from Teekay Corporation relating to the production shortfall during the period January 1, 2014 through February 21, 2014 and a further $0.4 million relating to unreimbursed vessel operating expenses incurred before the unit was declared on-hire as of February 22, 2014. These indemnification payments received by the Partnership from Teekay Corporation have effectively been treated as a reduction to the purchase price of the Voyageur Spirit (see note 6f).

Reconciliation of Total Segment Assets to Total Assets Presented in Accompanying Consolidated Balance Sheets

A reconciliation of total segment assets to total assets presented in the accompanying consolidated balance sheets is as follows:

	June 30, 2015		December 31, 2014
	$		$
Shuttle tanker segment		1,827,194		1,936,809
FPSO segment		1,259,634		1,267,076
FSO segment		267,157		133,925
Conventional tanker segment		138,235		150,109
Towage segment		260,047		61,795
UMS segment		287,930		62,017
Unallocated:
Cash and cash equivalents and restricted cash		316,464		298,898
Other assets		10,185		34,635
Consolidated total assets		4,366,846		3,945,264

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Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Parenthetical) (Detail) - USD ($)	Aug. 21, 2015	Jul. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount			$ 1,659,709,000
Swap Agreement Three [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount			$ 180,000,000
Minimum [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Range of credit facility margin			0.30%	0.30%
Maximum [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Range of credit facility margin			3.25%
Subsequent Event [Member] | Swap Agreement Three [Member] | Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount	$ 90,000,000
Subsequent Event [Member] | Swap Agreement Three [Member] | Interest rate swap termination [Member]
Derivative [Line Items]
Notional Amount		$ 90,000,000

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Long-Term Debt - Additional Information - Senior unsecured bonds (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	May. 31, 2014	Nov. 30, 2013	Sep. 30, 2013
US Dollar Bonds Due in 2019 [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued		$ 300.0
Fixed interest rate of bonds		6.00%
Ten Year Senior Unsecured Bonds [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued	$ 160.8		$ 174.2	$ 174.2
Fixed interest rate of bonds			4.96%	4.96%
Debt instrument collateral, description	The bonds are collateralized by first-priority mortgages on the two vessels to which the bonds relate, together with other related security.
Frequency of paying U.S. Dollar-denominated Term Loans	Semi-annual repayments
Logitel Offshore Holding [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued	$ 28.2

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Segment Reporting - Reconciliation of Total Segment Assets to Total Assets Presented in Accompanying Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Cash and cash equivalents and restricted cash	$ 316,464	$ 298,898
Other assets	10,185	34,635
Consolidated total assets	4,366,846	3,945,264
Shuttle Tanker [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,827,194	1,936,809
FPSO Segment [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,259,634	1,267,076
FSO Segment [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	267,157	133,925
Conventional Tanker [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	138,235	150,109
Towage segment [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	260,047	61,795
UMS Segment [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	$ 287,930	$ 62,017

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Derivative Instruments and Hedging Activities - Location and Fair Value Amounts of Assets (Liabilities) of Partnership's Derivative Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 5,240	$ 4,660
Accrued Liabilities	(120,438)	(68,013)
Current Portion of Derivative Liabilities	(106,588)	(85,318)
Derivative Liabilities	(236,208)	(257,754)
Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	5,240	4,660
Foreign currency contracts [Member] | Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	430
Interest Rate Swaps [Member] | Derivative Financial Instruments, Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets	4,810	4,660
Derivative Financial Instruments, Liabilities [Member]
Derivatives, Fair Value [Line Items]
Accrued Liabilities	(7,403)	(9,847)
Current Portion of Derivative Liabilities	(106,588)	(85,318)
Derivative Liabilities	(236,208)	(257,754)
Derivative Financial Instruments, Liabilities [Member] | Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Current Portion of Derivative Liabilities	(9,067)	(8,490)
Derivative Liabilities	(1,513)	(2,778)
Derivative Financial Instruments, Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Accrued Liabilities	(5,920)	(8,742)
Current Portion of Derivative Liabilities	(63,873)	(70,332)
Derivative Liabilities	(129,269)	(142,074)
Derivative Financial Instruments, Liabilities [Member] | Cross currency swap [Member]
Derivatives, Fair Value [Line Items]
Accrued Liabilities	(1,483)	(1,105)
Current Portion of Derivative Liabilities	(33,648)	(6,496)
Derivative Liabilities	$ (105,426)	$ (112,902)

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Acquisitions - Consolidated Pro Forma Financial Information (Detail) - 6 months ended Jun. 30, 2014 - USD ($) $ / shares in Units, $ in Thousands	Total
ALP Maritime Services B.V. [Member]
Business Acquisition [Line Items]
Revenues	$ 500,771
Net income	$ 5,061
Limited partners' interest in net income per common unit: - Basic	$ (0.13)
Limited partners' interest in net income per common unit: - Diluted	$ (0.13)
Logitel Offshore Holding [Member]
Business Acquisition [Line Items]
Revenues	$ 500,636
Net income	$ 4,460
Limited partners' interest in net income per common unit: - Basic	$ (0.14)
Limited partners' interest in net income per common unit: - Diluted	$ (0.14)

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Commitments and Contingencies - Additional Information - Petrojarl I (Detail) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Dec. 31, 2014	Jun. 30, 2015
Loss Contingencies [Line Items]
Payments made towards commitments	$ 30,211	$ 34,503
Petrojarl I FPSO [Member]
Loss Contingencies [Line Items]
Business acquisition, purchase price	57,000
Estimated cost of project	$ 231,000
Operating lease arrangement period, lessor		5 years
Payments made towards commitments		$ 30,300
Purchase obligation due (remainder of 2015)		116,300
Purchase obligation due in 2016		27,500
Secured long-term loan		$ 180,000

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Derivative Instruments and Hedging Activities - Foreign Currency Forward Contracts (Detail) - Jun. 30, 2015 $ in Thousands	NOK	USD ($)	EUR (€)	SGD
Norwegian Kroner [Member]
Derivative [Line Items]
Contract Amount in Foreign Currency | NOK	NOK 608,500,000
Average Forward Rate	7.01	7.01	7.01	7.01
Euro [Member]
Derivative [Line Items]
Contract Amount in Foreign Currency | €			€ 23,137,000
Average Forward Rate	0.88	0.88	0.88	0.88
Singapore Dollars [Member]
Derivative [Line Items]
Contract Amount in Foreign Currency | SGD				SGD 22,442,000
Average Forward Rate	1.35	1.35	1.35	1.35
Foreign currency forward contracts [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability) Non-hedge		$ (10,150)
Foreign currency forward contracts [Member] | Norwegian Kroner [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability) Non-hedge		(9,610)
Expected Maturity Current Year		35,217
Expected Maturity Next Fiscal Year		46,632
Expected Maturity Fiscal Year Two		4,905
Foreign currency forward contracts [Member] | Euro [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability) Non-hedge		(593)
Expected Maturity Current Year		24,011
Expected Maturity Next Fiscal Year		2,413
Foreign currency forward contracts [Member] | Singapore Dollars [Member]
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability) Non-hedge		53
Expected Maturity Next Fiscal Year		$ 16,537

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Accounting Pronouncements

6 Months Ended

Jun. 30, 2015

Accounting Changes and Error Corrections [Abstract]

Accounting Pronouncements

2. Accounting Pronouncements

In April 2014, the Financial Accounting Standards Board (or FASB) issued Accounting Standards Update 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (or ASU 2014-08), which raises the threshold for disposals to qualify as discontinued operations. A discontinued operation is now defined as: (i) a component of an entity or group of components that has been disposed of or classified as held for sale and represents a strategic shift that has or will have a major effect on an entity’s operations and financial results; or (ii) an acquired business that is classified as held for sale on the acquisition date. ASU 2014-08 also requires additional disclosures regarding discontinued operations, as well as material disposals that do not meet the definition of discontinued operations. ASU 2014-08 was adopted on January 1, 2015. The impact, if any, of adopting ASU 2014-08 on the Partnership’s financial statements will depend on the occurrence and nature of disposals that occur after ASU 2014-08 is adopted.

In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (or ASU 2014-09). ASU 2014-09 will require an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This update creates a five-step model that requires entities to exercise judgment when considering the terms of the contract(s) which include (i) identifying the contract(s) with the customer, (ii) identifying the separate performance obligations in the contract, (iii) determining the transaction price, (iv) allocating the transaction price to the separate performance obligations, and (v) recognizing revenue as each performance obligation is satisfied. ASU 2014-09 is effective for interim and annual periods beginning after December 15, 2016 and shall be applied, at the Partnership’s option, retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. Early adoption is not permitted. The Partnership is evaluating the effect of adopting this new accounting guidance.

In February 2015, the FASB issued Accounting Standards Update 2015-02, Amendments to the Consolidation Analysis (or ASU 2015-02) which eliminates the deferral of certain consolidation standards for entities considered to be investment companies, modifies the consolidation analysis performed on limited partnerships and modifies the impact of fee arrangements and related parties on the determination of the primary beneficiary of a variable interest entity. ASU 2015-02 is effective for interim and annual periods beginning after December 15, 2015. ASU 2015-02 may be applied using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. A reporting entity also may apply ASU 2015-02 retrospectively. The Partnership is evaluating the effect of adopting this new accounting guidance.

In April 2015, the FASB issued Accounting Standards Update 2015-03, Simplifying the Presentation of Debt Issuance Costs (or ASU 2015-03) which require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 is effective for interim and annual periods beginning after December 15, 2015 and is to be applied on a retrospective basis. The Partnership is evaluating the effect of adopting this new accounting guidance.

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Commitments and Contingencies - Additional Information - Shuttle Tankers (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($) Vessel	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Payments made towards commitments	$ 34,503	$ 30,211
Shuttle Tanker [Member]
Loss Contingencies [Line Items]
Operating lease arrangement period, lessor	15 years
Number of vessels | Vessel	3
Estimated cost of project	$ 368,000
Payments made towards commitments	33,200
Purchase obligation due (remainder of 2015)	3,200
Purchase obligation due in 2016	55,200
Purchase obligation due in 2017	207,500
Purchase obligation due in 2018	$ 68,600
Shuttle Tanker [Member] | Order or Production Backlog [Member]
Loss Contingencies [Line Items]
Number of vessels | Vessel	1
Shuttle Tanker [Member] | Delivery in Third Quarter of 2015 [Member]
Loss Contingencies [Line Items]
Number of vessels | Vessel	1
Shuttle Tanker [Member] | Delivery in Fourth Quarter of 2017 Through First Half of 2018 [Member] | Newbuildings [Member]
Loss Contingencies [Line Items]
Number of vessels | Vessel	3

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Long-Term Debt - Additional Information - Other (Detail) $ in Millions	Jun. 30, 2015 USD ($) CreditFacility	Dec. 31, 2014
Debt Instrument [Line Items]
Weighted-average effective interest rate	3.30%	3.50%
Aggregate principal repayments, remainder of 2015	$ 164.0
Aggregate principal repayments, 2016	441.3
Aggregate principal repayments, 2017	457.0
Aggregate principal repayments, 2018	476.1
Aggregate principal repayments, 2019	602.0
Aggregate principal repayments, thereafter	521.6
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Aggregate principal repayments, remainder of 2015	70.5
Aggregate principal repayments, 2016	203.7
Aggregate principal repayments, 2017	102.8
Aggregate principal repayments, 2018	136.2
Aggregate principal repayments, 2019	$ 47.3
Number of credit facilities | CreditFacility	6
Collateralized Debt Obligations [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Number of credit facilities | CreditFacility	2
Collateralized Debt Obligations [Member] | Term loans [Member]
Debt Instrument [Line Items]
Number of credit facilities | CreditFacility	2
Minimum [Member] | Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Range of credit facility margin	0.30%	0.30%
Minimum [Member] | Line of Credit One [Member] | Collateralized Debt Obligations [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	105.00%
Vessel values to drawn principal balance ratios	133.00%
Minimum [Member] | Line of Credit One [Member] | Collateralized Debt Obligations [Member] | Term loans [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	105.00%
Vessel values to drawn principal balance ratios	133.00%
Minimum [Member] | Line of Credit Two [Member] | Collateralized Debt Obligations [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	105.00%
Vessel values to drawn principal balance ratios	133.00%
Minimum [Member] | Line of Credit Two [Member] | Collateralized Debt Obligations [Member] | Term loans [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	105.00%
Vessel values to drawn principal balance ratios	133.00%
Maximum [Member] | Interest Rate Swaps [Member]
Debt Instrument [Line Items]
Range of credit facility margin	3.25%
Range of credit facility margin	3.25%	3.25%
Maximum [Member] | Line of Credit One [Member] | Collateralized Debt Obligations [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	125.00%
Vessel values to drawn principal balance ratios	204.00%
Maximum [Member] | Line of Credit One [Member] | Collateralized Debt Obligations [Member] | Term loans [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	125.00%
Vessel values to drawn principal balance ratios	204.00%
Maximum [Member] | Line of Credit Two [Member] | Collateralized Debt Obligations [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	125.00%
Vessel values to drawn principal balance ratios	204.00%
Maximum [Member] | Line of Credit Two [Member] | Collateralized Debt Obligations [Member] | Term loans [Member]
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	125.00%
Vessel values to drawn principal balance ratios	204.00%
Obligations [Member]
Debt Instrument [Line Items]
Outstanding loan amount	$ 86.6
Partnership [Member] | Obligations [Member]
Debt Instrument [Line Items]
Outstanding loan amount	$ 51.6

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Income Tax (Tables)

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Components of Provision for Income Tax

The components of the provision for income tax are as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Current		(271	)		(415	)		(627	)		(1,668	)
Deferred		(82	)		233			(571	)		223
Income tax expense		(353	)		(182	)		(1,198	)		(1,445	)

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Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Foreign Currency Forward Contracts

As at June 30, 2015, the Partnership was committed to the following foreign currency forward contracts:

	Contract Amount		Fair Value / Carrying
	in Foreign		Amount of Asset (Liability)			Average		Expected Maturity
	Currency		(in thousands of U.S. Dollars)			Forward		2015		2016		2017
	(thousands)		Non-hedge			Rate (1)		(in thousands of U.S. Dollars)
Norwegian Kroner		608,500		(9,610	)		7.01		35,217		46,632		4,905
Euro		23,137		(593	)		0.88		24,011		2,413		—
Singapore Dollar		22,442		53			1.35		—		16,537		—
				(10,150	)

(1) Average forward rate represents the contracted amount of foreign currency one U.S. Dollar will buy.

Summary of Cross Currency Swaps

As at June 30, 2015, the Partnership was committed to the following cross currency swaps:

											Fair Value /			Remaining Term (years)
Notional Amount		Principal Amount		Floating Rate Receivable				Fixed Rate Payable			Carrying Amount of
NOK		USD		Reference Rate	Margin						Asset (Liability)
(thousands)		(thousands)									$
	600,000		101,351	NIBOR		5.75	%		7.49	%		(28,252	)		1.6
	500,000		89,710	NIBOR		4.00	%		4.94	%		(26,776	)		0.6
	800,000		143,536	NIBOR		4.75	%		6.07	%		(44,925	)		2.6
	1,000,000		162,200	NIBOR		4.25	%		6.42	%		(40,604	)		3.6
												(140,557	)

Interest Rate Swap Agreements

As at June 30, 2015, the Partnership was committed to the following interest rate swap agreements:

	Interest Rate Index	Notional Amount $		Fair Value / Carrying Amount of Asset (Liability) $			Weighted- Average Remaining Term (years)		Fixed Interest Rate (%) (1)
U.S. Dollar-denominated interest rate swaps (2)	LIBOR		600,000		(142,385	)		10.3		4.8
U.S. Dollar-denominated interest rate swaps (3)	LIBOR		879,709		(42,431	)		5.9		2.5
U.S. Dollar-denominated interest rate swaps (4)	LIBOR		180,000		(9,436	)		0.1		3.4
			1,659,709		(194,252	)

(1) Excludes the margin the Partnership pays on its variable-rate debt, which as at June 30, 2015, ranged between 0.30% and 3.25%

(2) Notional amount remains constant over the term of the swap.

(3) Principal amount reduces quarterly or semi-annually.

(4) The interest rate swap is being used to economically hedge expected interest payments on new debt that is planned to be outstanding from 2016 to 2028. The interest rate swap is subject to mandatory early termination in July 2015 whereby the swap will be settled based on its fair value at that time. Subsequent to June 30, 2015, $90.0 million of this interest rate swap was terminated in July 2015 and the remaining $90.0 million was rolled over until August 21, 2015.

Location and Fair Value Amounts of Assets (Liabilities) of Partnership's Derivative Instruments

The following table presents the location and fair value amounts of the assets (liabilities) of the Partnership’s derivative instruments, segregated by type of contract, on the Partnership’s balance sheets.

	Derivative Assets $		Accrued Liabilities $			Current Portion of Derivative Liabilities $			Derivative Liabilities $
As at June 30, 2015
Foreign currency contracts		430		—			(9,067	)		(1,513	)
Cross currency swaps		—		(1,483	)		(33,648	)		(105,426	)
Interest rate swaps		4,810		(5,920	)		(63,873	)		(129,269	)
		5,240		(7,403	)		(106,588	)		(236,208	)

As at December 31, 2014
Foreign currency contracts	—	—		(8,490	)	(2,778	)
Cross currency swaps	—	(1,105	)	(6,496	)	(112,902	)
Interest rate swaps	4,660	(8,742	)	(70,332	)	(142,074	)
	4,660	(9,847	)	(85,318	)	(257,754	)

Effect of Losses on Derivatives

The effect of the losses on these derivatives on the consolidated statements of income (loss) is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Realized (losses) gains relating to:
Interest rate swaps		(11,775	)		(13,997	)		(24,073	)		(28,060	)
Foreign currency forward contracts		(2,571	)		196			(5,824	)		(302	)
		(14,346	)		(13,801	)		(29,897	)		(28,362	)
Unrealized gains (losses) relating to:
Interest rate swaps		50,415			(22,985	)		19,414			(47,093	)
Foreign currency forward contracts		6,213			(1,358	)		1,117			679
		56,628			(24,343	)		20,531			(46,414	)
Total realized and unrealized gains (losses) on derivative instruments		42,282			(38,144	)		(9,366	)		(74,776	)

Effect of Gain (Loss) on Cross Currency Swaps on Consolidated Statements of Income (Loss)

The effect of the gain (loss) on cross currency swaps on the consolidated statements of income (loss) is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Realized losses		(1,953	)		(38	)		(4,333	)		(22	)
Unrealized gains (losses)		12,525			(14,267	)		(19,676	)		(6,692	)
Total realized and unrealized gains (losses) on currency swaps		10,572			(14,305	)		(24,009	)		(6,714	)

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Commitments and Contingencies - Additional Information - Randgrid (Detail)	Jun. 30, 2015
Randgrid shuttle tanker [Member]
Loss Contingencies [Line Items]
Percentage of ownership by non-controlling owners	33.00%

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Related Party Transactions and Balances - Additional Information (Detail) $ in Thousands, shares in Millions			1 Months Ended				3 Months Ended		6 Months Ended		9 Months Ended	12 Months Ended
	Jun. 10, 2013 USD ($)	May. 02, 2013 USD ($) ExtensionOptions shares	Dec. 31, 2014 USD ($)	Mar. 31, 2014 Vessel	Jan. 31, 2014 Vessel	May. 31, 2013 USD ($) ExtensionOptions	Jun. 30, 2015 USD ($) Vessel	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Vessel	Jun. 30, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transaction [Line Items]
Due from affiliates			$ 44,225				$ 37,856		$ 37,856			$ 44,225
Due to affiliates			108,941				143,742		143,742			108,941
Equity distribution									115,460
Dropdown Predecessor [Member]
Related Party Transaction [Line Items]
Percentage of ownership in acquired entity after acquisition		100.00%
Additional term of contract		1 year
Entity acquired, purchase price									503,100
Net assumed debt on purchase							$ 273,100		273,100
Liabilities assumed on business combination		$ 230,000
Excess purchase price over book value									201,800
Carrying value in excess of fair value									4,300
Common units issued | shares		1.4
Dropdown Predecessor [Member] | Indemnification Agreement [Member]
Related Party Transaction [Line Items]
Indemnification amount												41,100
Dropdown Predecessor [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Operating lease arrangement period, lessor		5 years
Number of extension options | ExtensionOptions		10
Dropdown Predecessor [Member] | Initial [Member]
Related Party Transaction [Line Items]
Entity acquired, purchase price		$ 540,000
Itajai FPSO Joint Venture [Member]
Related Party Transaction [Line Items]
Entity acquired, purchase price	$ 53,800
Resolution of contractual items, Aggregate reimbursement												6,100
Return of aggregate reimbursements from resolution of contractual terms												$ (6,100)
Navion Clipper [Member]
Related Party Transaction [Line Items]
Shipbuilding and supervision costs									3,500
Operating lease arrangement period, lessor						10 years
Randgrid shuttle tanker [Member]
Related Party Transaction [Line Items]
Shipbuilding and supervision costs									$ 3,700
Operating lease arrangement period, lessor									3 years
Percentage of interest in joint venture						67.00%
Additional term of contract									1 year
Number of extension options | ExtensionOptions						12
Estimated cost of project						$ 273,000
Petrojarl I FPSO [Member]
Related Party Transaction [Line Items]
Entity acquired, purchase price			57,000
Estimated cost of project			$ 231,000
Interest rate, percentage			6.50%									6.50%
Affiliated Entity [Member] | Shuttle Tanker [Member]
Related Party Transaction [Line Items]
Number of vessels | Vessel							2		2
Affiliated Entity [Member] | Conventional Tanker [Member]
Related Party Transaction [Line Items]
Number of vessels | Vessel							4		4
Affiliated Entity [Member] | FSO Segment [Member]
Related Party Transaction [Line Items]
Number of vessels | Vessel							3		3
Teekay Corporation [Member] | Conventional Tanker [Member]
Related Party Transaction [Line Items]
Number of vessels | Vessel				2	2
Percentage of interest in joint venture				50.00%	50.00%
Equity distribution							$ 300	$ 300	$ 600	$ 400
Teekay Corporation [Member] | Dropdown Predecessor [Member]
Related Party Transaction [Line Items]
Equity distribution												$ 71,400
Teekay Corporation [Member] | Dropdown Predecessor [Member] | Indemnification Agreement [Member]
Related Party Transaction [Line Items]
Indemnification amount											$ 34,900
Teekay Corporation [Member] | Dropdown Predecessor [Member] | Production Shortfalls [Member] | Indemnification Agreement [Member]
Related Party Transaction [Line Items]
Indemnification amount												3,500
Teekay Corporation [Member] | Dropdown Predecessor [Member] | Unrecovered Repair Cost [Member] | Indemnification Agreement [Member]
Related Party Transaction [Line Items]
Indemnification amount												3,500
Teekay Corporation [Member] | Dropdown Predecessor [Member] | Preacquisition Capital Expenditures [Member] | Indemnification Agreement [Member]
Related Party Transaction [Line Items]
Indemnification amount												2,700
Teekay Corporation [Member] | Itajai FPSO Joint Venture [Member]
Related Party Transaction [Line Items]
Percentage of interest in joint venture	50.00%
Teekay Corporation [Member] | Petrojarl I FPSO [Member]
Related Party Transaction [Line Items]
Equity distribution												$ 12,400

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Acquisitions (Tables)

6 Months Ended

Jun. 30, 2015

ALP Maritime Services B.V. [Member]

Fair Values of Assets Acquired and Liabilities Assumed by Partnership

The following table summarizes the finalized estimates of fair values of the ALP assets acquired and liabilities assumed by the Partnership on the acquisition date.

	As at March 14, 2014 $
ASSETS
Cash and cash equivalents		294
Other current assets		404
Advances on newbuilding contracts		164
Other assets - long-term		395
Goodwill (towage segment)		2,032
Total assets acquired		3,289
LIABILITIES
Current liabilities		387
Other long-term liabilities		286
Total liabilities assumed		673
Net assets acquired		2,616
Consideration		2,616

Consolidated Pro Forma Financial Information

The following table shows summarized consolidated pro forma financial information for the Partnership for the six months ended June 30, 2014, solely giving effect to the Partnership’s acquisition of ALP as if it had taken place on January 1, 2013:

	Pro Forma Six Months ended June 30, 2014 $
Revenues		500,771
Net income		5,061
Limited partners’ interest in net income per common unit:
- Basic		(0.13	)
- Diluted		(0.13	)

Logitel Offshore Holding [Member]

Fair Values of Assets Acquired and Liabilities Assumed by Partnership

The following table summarizes the preliminary and finalized valuations of the Logitel assets and liabilities on the acquisition date. The estimates of fair values of the Logitel assets acquired and liabilities assumed by the Partnership were finalized during the second quarter of 2015.

(in thousands of U.S. dollars)	Preliminary Valuation August 11, 2014 $		Adjustments $			Final Valuation August 11, 2014 $
ASSETS
Cash and cash equivalents		8,089		—			8,089
Prepaid expenses		640		—			640
Advances on newbuilding contracts		46,809		(2,239	)		44,570
Intangible assets		—		1,000			1,000
Total assets acquired		55,538		(1,239	)		54,299
LIABILITIES
Accrued liabilities		4,098		—			4,098
Long-term debt		26,270		1,330			27,600
Total liabilities assumed		30,368		1,330			31,698
Net assets acquired		25,170		(2,569	)		22,601
Cash consideration		4,000		—			4,000
Contingent consideration		21,170		(2,569	)		18,601

Consolidated Pro Forma Financial Information

The following table shows summarized consolidated pro forma financial information for the Partnership for the six months ended June 30, 2014, solely giving effect to the Partnership’s acquisition of Logitel as if it had taken place on January 1, 2013:

	Pro Forma Six Months ended June 30, 2014 $
Revenues		500,636
Net income		4,460
Limited partners’ interest in net income per common unit:
- Basic		(0.14	)
- Diluted		(0.14	)

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Financial Instruments - Estimated Fair Value of Financial Instruments Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Recurring:
Cash and cash equivalents and restricted cash	$ 316,464	$ 298,898
Other:
Long-term debt	(2,661,962)	(2,436,023)
Interest Rate Swaps [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(194,252)
Cross currency swaps agreements [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(140,557)
Foreign currency forward contracts [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(10,150)
Logitel Offshore Holding [Member]
Recurring:
Contingent consideration	(15,292)
Carrying Amount [Member] | Level 1 [Member] | Recurring [Member]
Recurring:
Cash and cash equivalents and restricted cash	316,464	298,898
Carrying Amount [Member] | Level 1 [Member] | Public [Member]
Other:
Long-term debt	(669,277)	(689,157)
Carrying Amount [Member] | Level 3 [Member] | Recurring [Member] | Logitel Offshore Holding [Member]
Recurring:
Contingent consideration	(15,292)	(21,448)
Carrying Amount [Member] | Level 2 [Member] | Recurring [Member] | Interest Rate Swaps [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(194,252)	(216,488)
Carrying Amount [Member] | Level 2 [Member] | Recurring [Member] | Cross currency swaps agreements [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(140,557)	(120,503)
Carrying Amount [Member] | Level 2 [Member] | Recurring [Member] | Foreign currency forward contracts [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(10,150)	(11,268)
Carrying Amount [Member] | Level 2 [Member] | Non-Public [Member]
Other:
Long-term debt	(1,992,685)	(1,746,866)
Fair Value [Member] | Level 1 [Member] | Recurring [Member]
Recurring:
Cash and cash equivalents and restricted cash	316,464	298,898
Fair Value [Member] | Level 1 [Member] | Public [Member]
Other:
Long-term debt	(637,129)	(656,899)
Fair Value [Member] | Level 3 [Member] | Recurring [Member] | Logitel Offshore Holding [Member]
Recurring:
Contingent consideration	(15,292)	(21,448)
Fair Value [Member] | Level 2 [Member] | Recurring [Member] | Interest Rate Swaps [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(194,252)	(216,488)
Fair Value [Member] | Level 2 [Member] | Recurring [Member] | Cross currency swaps agreements [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(140,557)	(120,503)
Fair Value [Member] | Level 2 [Member] | Recurring [Member] | Foreign currency forward contracts [Member]
Derivative instruments
Fair Value/Carrying Amount of Assets (Liability)	(10,150)	(11,268)
Fair Value [Member] | Level 2 [Member] | Non-Public [Member]
Other:
Long-term debt	$ (1,974,978)	$ (1,743,378)

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Basis of Presentation

6 Months Ended

Jun. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

1. Basis of Presentation

The unaudited interim consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP). These financial statements include the accounts of Teekay Offshore Partners L.P., which is a limited partnership organized under the laws of the Republic of The Marshall Islands, and its wholly owned or controlled subsidiaries (collectively, the Partnership).

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Certain information and footnote disclosures required by GAAP for complete annual financial statements have been omitted and, therefore, these interim financial statements should be read in conjunction with the Partnership’s audited consolidated financial statements for the year ended December 31, 2014, which are included in the Partnership’s Annual Report on Form 20-F, filed with the U.S. Securities and Exchange Commission (or SEC) on April 2, 2015. In the opinion of management of the Partnership’s general partner, Teekay Offshore GP L.L.C. (or the General Partner), these interim unaudited consolidated financial statements reflect all adjustments, which are of a normal recurring nature, necessary to present fairly, in all material respects, the Partnership’s consolidated financial position, results of operations, changes in total equity and cash flows for the interim periods presented. The results of operations for the interim periods presented are not necessarily indicative of those for a full fiscal year. Historically, the utilization of shuttle tankers in the North Sea is higher in the winter months as favorable weather conditions in the summer months provide opportunities for repairs and maintenance to our vessels and the offshore oil platforms. Downtime for repairs and maintenance generally reduces oil production and, thus, transportation requirements. Significant intercompany balances and transactions have been eliminated upon consolidation.

The Partnership presents non-controlling ownership interests in subsidiaries in the consolidated financial statements within the equity section, but separate from the Partners’ equity. However, the holder of the non-controlling interest of one of the Partnership’s subsidiaries holds a put option which, if exercised, would obligate the Partnership to purchase the non-controlling interest (see note 9a). As a result, the non-controlling interest that is subject to this redemption feature is not included on the Partnership’s consolidated balance sheet as part of the total equity and is presented as redeemable non-controlling interest above the equity section but below the liabilities section on the Partnership’s consolidated balance sheet.

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Financial Instruments - Additional Information (Detail) - Logitel Offshore Holding [Member] - USD ($) $ in Thousands		1 Months Ended	6 Months Ended
	Aug. 11, 2014	Aug. 31, 2014	Jun. 30, 2015
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Percentage of noncontrolling interest acquired	100.00%	100.00%
Portion of purchase price paid in cash	$ 4,000	$ 4,000
Potential additional cash amount for purchase price	$ 27,600	$ 27,600
Business Combination, Contingent Consideration Arrangements, Description			If there are no yard cost overruns and no charterer late delivery penalties; the two unchartered UMS under construction are chartered above specified rates; and no material defects from construction are identified within one year after the delivery of each UMS. To the extent such events occur, the potential additional amount of $27.6 million will be reduced in accordance with the terms of the purchase agreement.
Estimated fair value of contingent consideration liability			$ 15,292
Weighted average cost of capital, discount rate			11.50%

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Long-Term Debt - Additional Information - NOK Bonds (Detail) NOK in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2015 NOK	Jun. 30, 2015 USD ($)	Jan. 31, 2014 NOK	Jan. 31, 2013 NOK	Jan. 31, 2012 NOK
Norwegian Kroner Bond Due In January Two Thousand Nineteen [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued		$ 127.3
Norwegian Kroner Bond Due In January Two Thousand Nineteen [Member] | NIBOR Loan [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued | NOK			NOK 1,000
Marginal rate added for interest paid	4.25%
Reference rate for the variable rate of the debt instrument	NIBOR
Norwegian kroner bond [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued		165.5		NOK 1,300
Norwegian Kroner Bond due in 2016 [Member] | NIBOR Loan [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued | NOK	NOK 500
Marginal rate added for interest paid	4.00%
Reference rate for the variable rate of the debt instrument	NIBOR
Norwegian Kroner Bonds due through 2018 [Member] | NIBOR Loan [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued | NOK	NOK 800
Marginal rate added for interest paid	4.75%
Reference rate for the variable rate of the debt instrument	NIBOR
Norwegian Kroner Bond due in 2017 [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued		$ 76.4
Norwegian Kroner Bond due in 2017 [Member] | NIBOR Loan [Member]
Debt Instrument [Line Items]
Senior unsecured bonds issued | NOK					NOK 600
Marginal rate added for interest paid	5.75%
Reference rate for the variable rate of the debt instrument	NIBOR
Interest Rate Swaps [Member] | Norwegian Kroner Bond Due In January Two Thousand Nineteen [Member]
Debt Instrument [Line Items]
Fixed interest rates based on interest rate swaps	6.42%	6.42%
Debt instrument transfer of principal amount		$ 162.2
Interest Rate Swaps [Member] | Norwegian Kroner Bond due in 2016 [Member]
Debt Instrument [Line Items]
Fixed interest rates based on interest rate swaps	4.94%	4.94%
Debt instrument transfer of principal amount		$ 89.7
Interest Rate Swaps [Member] | Norwegian Kroner Bonds due through 2018 [Member]
Debt Instrument [Line Items]
Fixed interest rates based on interest rate swaps	6.07%	6.07%
Debt instrument transfer of principal amount		$ 143.5
Interest Rate Swaps [Member] | Norwegian Kroner Bond due in 2017 [Member]
Debt Instrument [Line Items]
Fixed interest rates based on interest rate swaps	7.49%	7.49%
Debt instrument transfer of principal amount		$ 101.4

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Derivative Instruments and Hedging Activities - Effect of Losses on Derivatives (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Realized (losses) gains relating to:
Derivative instruments not designated as hedging instruments realized (loss) gain net	$ (14,346)	$ (13,801)	$ (29,897)	$ (28,362)
Unrealized gains (losses) relating to:
Derivative instruments not designated as hedging instruments unrealized (loss) gain net	56,628	(24,343)	20,531	(46,414)
Total realized and unrealized gains (losses) on derivative instruments	42,282	(38,144)	(9,366)	(74,776)
Not Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Realized (losses) gains relating to:
Derivative instruments not designated as hedging instruments realized (loss) gain net	(11,775)	(13,997)	(24,073)	(28,060)
Unrealized gains (losses) relating to:
Derivative instruments not designated as hedging instruments unrealized (loss) gain net	50,415	(22,985)	19,414	(47,093)
Not Designated as Hedging Instrument [Member] | Foreign currency forward contracts [Member]
Realized (losses) gains relating to:
Derivative instruments not designated as hedging instruments realized (loss) gain net	(2,571)	196	(5,824)	(302)
Unrealized gains (losses) relating to:
Derivative instruments not designated as hedging instruments unrealized (loss) gain net	$ 6,213	$ (1,358)	$ 1,117	$ 679

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Unaudited Consolidated Statements of Income (Loss) And Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Revenues (note 6)	$ 255,758	$ 241,402	$ 506,669	$ 500,636
Voyage expenses	(20,716)	(26,256)	(43,233)	(59,710)
Vessel operating expenses (note 6)	(77,935)	(88,184)	(151,969)	(176,314)
Time-charter hire expense	(10,762)	(4,975)	(17,745)	(16,387)
Depreciation and amortization	(53,864)	(48,474)	(107,468)	(96,962)
General and administrative (notes 6 and 11)	(14,202)	(18,054)	(29,082)	(32,903)
(Write down) and gain on sale of vessels (note 13)	(500)		(14,353)
Restructuring (charge) recovery	(135)	821	(135)	262
Income from vessel operations	77,644	56,280	142,684	118,622
Interest expense (notes 5 and 6)	(24,741)	(21,568)	(47,924)	(40,488)
Interest income	135	190	269	367
Realized and unrealized gains (losses) on derivative instruments (note 7)	42,282	(38,144)	(9,366)	(74,776)
Equity income	9,720	2,388	13,811	6,091
Foreign currency exchange gain (loss) (note 7)	2,789	(2,836)	(4,287)	(3,611)
Other income - net (note 3)	388	72	647	462
Income (loss) before income tax expense	108,217	(3,618)	95,834	6,667
Income tax expense (note 8)	(353)	(182)	(1,198)	(1,445)
Net income (loss) and comprehensive income (loss)	107,864	(3,800)	94,636	5,222
Non-controlling interests in net income (loss)	3,638	1,654	7,636	3,333
Preferred unitholders' interest in net income (loss) (note 10)	4,791	2,719	7,510	5,438
General Partner's interest in net income (loss)	6,153	3,696	9,917	7,639
Limited partners' interest in net income (loss)	$ 93,282	$ (11,869)	$ 69,573	$ (11,188)
Limited partners' interest in net income (loss) per common unit:
Limited partners' interest in net income (loss) per common unit - basic (note 10)	$ 1.01	$ (0.14)	$ 0.75	$ (0.13)
Limited partners' interest in net income (loss) per common unit - diluted (note 10)	$ 1.01	$ (0.14)	$ 0.75	$ (0.13)
Weighted-average number of common units outstanding:
Weighted-average number of common units outstanding - basic	92,413,598	85,529,102	92,402,772	85,492,401
Weighted-average number of common units outstanding - diluted	92,457,480	85,529,102	92,470,600	85,492,401
Cash distributions declared per unit	$ 0.5384	$ 0.5384	$ 1.0768	$ 1.0768

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Related Party Transactions and Balances - Revenues (Expenses) from Related Party Transactions (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Related Party Transactions [Abstract]
Revenues	$ 17,490	$ 16,427	$ 34,819	$ 33,757
Vessel operating expenses	(10,412)	(10,182)	(19,850)	(19,830)
General and administrative	(8,235)	(10,252)	(16,062)	(18,540)
Interest expense	$ (112)	$ (112)	$ (223)	$ (223)

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Unaudited Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
ALP Maritime Services B.V. [Member]
Net cash acquired on business acquisition	$ 0.3	$ 0.3

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Commitments and Contingencies - Additional Information - Logitel (Detail) $ in Thousands		1 Months Ended	3 Months Ended	6 Months Ended
	Aug. 11, 2014 USD ($) MaintenanceAndSafety	Aug. 31, 2014 USD ($) MaintenanceAndSafety	Jun. 30, 2015 USD ($)	Jun. 30, 2015 USD ($) MaintenanceAndSafety	Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items]
Payments made towards commitments			$ 34,503	$ 34,503	$ 30,211
Logitel Offshore Holding [Member]
Loss Contingencies [Line Items]
Percentage of noncontrolling interest acquired	100.00%	100.00%
Number of units for maintenance safety | MaintenanceAndSafety	3	3
Expected cost of newbuildings	$ 580,000	$ 550,000
Payments made towards commitments			170,200	170,200
Purchase obligation due (remainder of 2015)			5,700	5,700
Purchase obligation due in 2016			188,100	188,100
Purchase obligation due in 2017			173,800	173,800
Purchase obligation due in 2018			$ 11,800	$ 11,800
Logitel Offshore Holding [Member] | UMS Segment [Member]
Loss Contingencies [Line Items]
Delivery option exercised period			120 days
Logitel Offshore Holding [Member] | Newbuildings [Member]
Loss Contingencies [Line Items]
Number of units for maintenance safety | MaintenanceAndSafety	2
Logitel Offshore Holding [Member] | Delivery in February 2015 [Member]
Loss Contingencies [Line Items]
Number of units for maintenance safety | MaintenanceAndSafety				1
Logitel Offshore Holding [Member] | Delivery in Third Quarter of 2016 and Second Quarter of 2017 [Member]
Loss Contingencies [Line Items]
Number of units for maintenance safety | MaintenanceAndSafety				2
Logitel Offshore Holding [Member] | Maximum [Member] | Newbuildings [Member] | UMS Segment [Member]
Loss Contingencies [Line Items]
Delivery option exercised period			1 year

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Segment Reporting - Segment Results as Presented in Consolidated Financial Statements (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Revenues	$ 255,758	$ 241,402	$ 506,669	$ 500,636
Voyage expenses	(20,716)	(26,256)	(43,233)	(59,710)
Vessel operating expenses	(77,935)	(88,184)	(151,969)	(176,314)
Time-charter hire expense	(10,762)	(4,975)	(17,745)	(16,387)
Depreciation and amortization	(53,864)	(48,474)	(107,468)	(96,962)
General and administrative	(14,202)	(18,054)	(29,082)	(32,903)
(Write down) and gain on sale of vessel	(500)		(14,353)
Restructuring recovery (charge)	(135)	821	(135)	262
Income (loss) from vessel operations	77,644	56,280	142,684	118,622
Shuttle Tanker [Member]
Segment Reporting Information [Line Items]
Revenues	132,899	137,042	270,989	290,222
Voyage expenses	(18,976)	(24,913)	(38,505)	(56,619)
Vessel operating expenses	(31,120)	(39,715)	(65,437)	(80,121)
Time-charter hire expense	(10,762)	(4,975)	(17,083)	(16,387)
Depreciation and amortization	(26,795)	(27,378)	(55,162)	(54,659)
General and administrative	(6,788)	(6,532)	(15,187)	(13,142)
(Write down) and gain on sale of vessel			(13,853)
Restructuring recovery (charge)	(135)	821	(135)	262
Income (loss) from vessel operations	38,323	34,350	65,627	69,556
FPSO Segment [Member]
Segment Reporting Information [Line Items]
Revenues	86,246	83,984	170,449	167,121
Vessel operating expenses	(33,557)	(39,472)	(64,790)	(79,863)
Depreciation and amortization	(19,844)	(18,186)	(39,939)	(36,089)
General and administrative	(5,011)	(7,989)	(9,813)	(13,747)
Income (loss) from vessel operations	27,834	18,337	55,907	37,422
FSO Segment [Member]
Segment Reporting Information [Line Items]
Revenues	14,165	11,673	28,651	25,962
Voyage expenses	(89)	(149)	(221)	(172)
Vessel operating expenses	(6,921)	(7,532)	(13,280)	(13,405)
Depreciation and amortization	(2,975)	(1,298)	(5,895)	(2,991)
General and administrative	(420)	(1,027)	(1,030)	(1,886)
Income (loss) from vessel operations	3,760	1,667	8,225	7,508
Conventional Tanker [Member]
Segment Reporting Information [Line Items]
Revenues	8,245	8,600	16,307	17,228
Voyage expenses	(647)	(1,188)	(1,215)	(2,913)
Vessel operating expenses	(1,514)	(1,465)	(2,888)	(2,925)
Depreciation and amortization	(1,675)	(1,612)	(3,349)	(3,223)
General and administrative	(507)	(312)	(759)	(845)
Income (loss) from vessel operations	3,902	4,023	8,096	7,322
Towage segment [Member]
Segment Reporting Information [Line Items]
Revenues	10,517	103	16,587	103
Voyage expenses	(1,004)	(6)	(3,292)	(6)
Vessel operating expenses	(3,697)		(4,448)
Time-charter hire expense			(662)
Depreciation and amortization	(2,174)		(2,722)
General and administrative	(837)	(2,194)	(1,147)	(3,283)
Income (loss) from vessel operations	2,805	$ (2,097)	4,316	$ (3,186)
UMS Segment [Member]
Segment Reporting Information [Line Items]
Revenues	3,686		3,686
Vessel operating expenses	(1,126)		(1,126)
Depreciation and amortization	(401)		(401)
General and administrative	(639)		(1,146)
(Write down) and gain on sale of vessel	(500)		(500)
Income (loss) from vessel operations	$ 1,020		$ 513

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Acquisitions - Acquisition of ALP Maritime Services B.V. - Additional Information (Detail) $ in Thousands		1 Months Ended		3 Months Ended			4 Months Ended	6 Months Ended
	Mar. 14, 2014 USD ($) Shareholder Vessel	Oct. 31, 2014 Vessel	Mar. 31, 2014 USD ($) Vessel	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Business Acquisition [Line Items]
General and administrative				$ 14,202	$ 18,054			$ 29,082	$ 32,903
Revenues				255,758	241,402			506,669	500,636
Net income (loss)								$ 94,636	5,222
ALP Maritime Services B.V. [Member]
Business Acquisition [Line Items]
Percentage of noncontrolling interest acquired	100.00%		100.00%			100.00%
Expected cost of new buildings	$ 258,000		$ 258,000
Purchase price paid in cash	$ 2,616
Number of vessels | Vessel		6
Business Combination, Contingent Consideration Arrangements, Description								The Partnership has the option to pay up to 50% of this compensation through the issuance of common units of the Partnership. Each of the contingent compensation amounts are payable only if the three shareholders are employed by ALP at the time performance conditions are met.
General and administrative				$ 200	200			$ 300	200
Acquisition and business development fee					$ 1,600				$ 1,600
Revenues							$ 200
Net income (loss)							$ (1,700)
ALP Maritime Services B.V. [Member] | Newbuildings [Member]
Business Acquisition [Line Items]
Number of vessels | Vessel	4		4
ALP Maritime Services B.V. [Member] | Shareholders of ALP [Member]
Business Acquisition [Line Items]
Number of shareholders | Shareholder	3
ALP Maritime Services B.V. [Member] | Shareholders of ALP [Member] | Delivered [Member]
Business Acquisition [Line Items]
Contingent consideration payable	$ 2,400
ALP Maritime Services B.V. [Member] | Shareholders of ALP [Member] | Contingent Consideration On Operating Results [Member]
Business Acquisition [Line Items]
Contingent consideration payable	$ 2,600
ALP Maritime Services B.V. [Member] | Affiliated Entity [Member]
Business Acquisition [Line Items]
Acquisition and business development fee						$ 1,000

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Subsequent Events

6 Months Ended

Jun. 30, 2015

Subsequent Events [Abstract]

Subsequent Events

15. Subsequent Events

a) In July 2015, the Partnership completed the acquisition of the Petrojarl Knarr FPSO unit from Teekay Corporation for a fully built-up cost of approximately $1.26 billion. In June 2015, the Petrojarl Knarr completed all required operational testing and commenced its full charter rate under its six-year fixed-rate charter contract, plus extension options, on the Knarr oil and gas field in the North Sea where BG Norge Limited is the operator. The acquisition was initially financed through the assumption of an existing $745 million long-term debt facility and a $492 million convertible promissory note issued by the Partnership to Teekay Corporation. During July 2015, the Partnership repaid $92 million, plus accrued interest, of the convertible promissory note to Teekay Corporation and exercised the mandatory conversion of $300 million of the outstanding principal balance on the note into the Partnership’s common units at a price of $20.83 per common unit. The $745 million long-term debt facility contains five-tranches with varying maturity dates from 2020 through 2026, of which the tranche maturing in 2020 includes a final bullet payment of $40 million and all of which reduce over time with semi-annual payments, is collateralized by a first-priority mortgage over the Petrojarl Knarr FPSO unit and is guaranteed by the Partnership.

b) In July 2015, the Partnership issued $250 million of Series C Convertible Preferred Units (the Series C Preferred Units) at a price of $23.95 per unit in a private placement. The Partnership used the net proceeds from the private placement to partially finance the acquisition of the Petrojarl Knarr FPSO unit from Teekay Corporation and the initial installments of the three shuttle tanker newbuildings for the east coast of Canada contract. The distribution rate for the Series C Preferred Units is 8.6% per annum and the Series C Preferred Units are convertible into the Partnership’s common units on a one-for-one basis at any time after 18 months at a price of $23.95 per unit. The Series C Preferred Units are also redeemable upon certain events. A summary description of the Series C Preferred Units is included in the Partnership’s Report on Form 6-K filed with the SEC on July 6, 2015.

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Segment Reporting - Segment Results as Presented in Consolidated Financial Statements (Parenthetical) (Detail) $ in Thousands		2 Months Ended	3 Months Ended		6 Months Ended
	Feb. 22, 2014 USD ($)	Feb. 21, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($) Vessel	Aug. 31, 2014	Aug. 11, 2014	May. 02, 2013
Segment Reporting Information [Line Items]
Restructuring recovery			$ 135	$ (821)	$ 135	$ (262)
Logitel Offshore Holding [Member]
Segment Reporting Information [Line Items]
Percentage of noncontrolling interest acquired							100.00%	100.00%
Dropdown Predecessor [Member]
Segment Reporting Information [Line Items]
Percentage of noncontrolling interest acquired									100.00%
Indemnification Agreement [Member] | Dropdown Predecessor [Member]
Segment Reporting Information [Line Items]
Unreimbursed vessel operating expenses	$ (400)
Shuttle Tanker [Member]
Segment Reporting Information [Line Items]
Restructuring recovery			$ 135	(821)	$ 135	(262)
Towage segment [Member] | ALP Maritime Services B.V. [Member]
Segment Reporting Information [Line Items]
Acquisition and business development fee						1,600
Production Shortfalls [Member] | Indemnification Agreement [Member] | Dropdown Predecessor [Member]
Segment Reporting Information [Line Items]
Indemnification of revenue loss		$ 3,100
Reimbursements [Member] | Shuttle Tanker [Member]
Segment Reporting Information [Line Items]
Restructuring recovery				$ (800)		(800)
Shuttle Tankers Reflagged [Member]
Segment Reporting Information [Line Items]
Restructuring charges						$ 600
Number of vessels | Vessel						1

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Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2015

Investments, All Other Investments [Abstract]

Estimated Fair Value of Financial Instruments Measured at Fair Value on Recurring Basis

The following table includes the estimated fair value and carrying value of those assets and liabilities that are measured at fair value on a recurring and non-recurring basis, as well as the estimated fair value of the Partnership’s financial instruments that are not accounted for at fair value on a recurring basis.

		June 30, 2015						December 31, 2014
	Fair Value Hierarchy Level	Carrying Amount Asset (Liability) $			Fair Value Asset (Liability) $			Carrying Amount Asset (Liability) $			Fair Value Asset (Liability) $
Recurring:
Cash and cash equivalents and restricted cash	Level 1		316,464			316,464			298,898			298,898
Logitel contingent consideration (see below)	Level 3		(15,292	)		(15,292	)		(21,448	)		(21,448	)
Derivative instruments (note 7)
Interest rate swap agreements	Level 2		(194,252	)		(194,252	)		(216,488	)		(216,488	)
Cross currency swap agreements	Level 2		(140,557	)		(140,557	)		(120,503	)		(120,503	)
Foreign currency forward contracts	Level 2		(10,150	)		(10,150	)		(11,268	)		(11,268	)
Other:
Long-term debt - public (note 5)	Level 1		(669,277	)		(637,129	)		(689,157	)		(656,899	)
Long-term debt - non-public (note 5)	Level 2		(1,992,685	)		(1,974,978	)		(1,746,866	)		(1,743,378	)

Changes in Fair Value for Partnership's Contingent Consideration Liability Measured Recurring Basis Using Significant Unobservable Inputs (Level 3)

Changes in the estimated fair value of the Partnership’s contingent consideration liability relating to the acquisition of Logitel, which is measured at fair value on a recurring basis using significant unobservable inputs (Level 3), during the three and six months ended June 30, 2015 and 2014 are as follows:

	Three months ended					Six months ended
	June 30,					June 30,
	2015			2014		2015			2014
	Asset (Liability)					Asset (Liability)
	$			$		$			$
Balance at beginning of period		(21,562	)		—		(21,448	)		—
Settlement of liability		3,540			—		3,540			—
Adjustment to liability (note 12b)		2,569			—		2,569			—
Unrealized gain included in Other income - net		161			—		47			—
Balance at end of period		(15,292	)		—		(15,292	)		—

Summary of Partnership's Financing Receivables

The following table contains a summary of the Partnership’s financing receivables by type of borrower and the method by which the Partnership monitors the credit quality of its financing receivables on a quarterly basis:

	Credit Quality Indicator		Grade		June 30, 2015		December 31, 2014
					$		$
Direct financing leases		Payment activity		Performing		20,100		22,458

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Acquisitions - Acquisition of Logitel Offshore Holding AS - Additional Information (Detail) - Logitel Offshore Holding [Member] $ in Thousands		1 Months Ended	3 Months Ended	6 Months Ended
	Aug. 11, 2014 USD ($) MaintenanceAndSafety	Aug. 31, 2014 USD ($) MaintenanceAndSafety	Jun. 30, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Percentage of noncontrolling interest acquired	100.00%	100.00%
Portion of purchase price paid in cash	$ 4,000	$ 4,000
Potential additional cash amount	$ 27,600	$ 27,600
Number of units for maintenance safety | MaintenanceAndSafety	3	3
Expected cost of project	$ 580,000	$ 550,000
Partnership interest on unpaid balance			5.00%	5.00%
Debt conversion, description				If the fourth of six options with COSCO is not exercised by its option expiry date on November 30, 2016, Sevan has a one-time option to receive the remaining two options with COSCO.
UMS Segment [Member]
Business Acquisition [Line Items]
Delivery option exercised period			120 days
Order or Production Backlog [Member]
Business Acquisition [Line Items]
Number of units for maintenance safety | MaintenanceAndSafety		6
Repayment of non-interest bearing amount on bond	$ 30,000
Debt, repayment terms				Within six months of delivery of each of the three UMS ordered from COSCO, for a total of $30.0 million.
Newbuildings [Member]
Business Acquisition [Line Items]
Number of units for maintenance safety | MaintenanceAndSafety	2
Newbuildings [Member] | Maximum [Member] | UMS Segment [Member]
Business Acquisition [Line Items]
Delivery option exercised period			1 year
Newbuildings [Member] | Order or Production Backlog [Member]
Business Acquisition [Line Items]
Repayment of non-interest bearing amount on bond	$ 10,000
Newbuildings [Member] | Additional Order Or Production Backlog [Member] | Maximum [Member]
Business Acquisition [Line Items]
Repayment of non-interest bearing amount on bond	$ 11,900
Scheduled For Delivery [Member]
Business Acquisition [Line Items]
Operating lease arrangement period, lessor				3 years
Scheduled For Delivery [Member] | Order or Production Backlog [Member]
Business Acquisition [Line Items]
Number of units for maintenance safety | MaintenanceAndSafety		1

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Unaudited Consolidated Statement of Changes in Total Equity - 6 months ended Jun. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Total	General Partner [Member]	Common Units [Member]	Common Units and Additional Paid-in Capital [Member]	Preferred Units [Member]	Non-controlling Interests [Member]	Redeemable Non-controlling Interest [Member]
Beginning balance at Dec. 31, 2014	$ 802,853	$ 21,038		$ 589,165	$ 144,800	$ 47,850	$ 12,842
Beginning balance, units at Dec. 31, 2014			92,386		6,000
Net income	94,636	9,917		69,573	$ 7,510	7,636
Reclassification of redeemable non-controlling interest in net income	(3,139)					(3,139)	3,139
Cash distributions	(115,460)	(10,526)		(99,496)	(5,438)
Distribution of capital to joint venture partner	(220)					(220)	(5,500)
Contribution of capital from joint venture partner	5,500					5,500
Proceeds from equity offerings, net of offering costs	120,813				$ 120,813
Proceeds from equity offerings, units, net of offering costs					5,000
Equity based compensation and other (notes 6h and 11)	1,379	28		1,351
Equity based compensation and other, units			28
Ending balance at Jun. 30, 2015	$ 906,362	$ 20,457		$ 560,593	$ 267,685	$ 57,627	$ 10,481
Ending balance, units at Jun. 30, 2015			92,414		11,000

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Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current
Cash and cash equivalents	$ 242,764	$ 252,138
Restricted cash (note 7 and 9c)	73,700	4,704
Accounts receivable, including non-trade of $5,382 (December 31, 2014 - $6,825)	117,085	103,665
Vessel held for sale (note 13)	5,000
Net investments in direct financing leases - current (note 3b)	5,501	4,987
Prepaid expenses	34,503	30,211
Due from affiliates (note 6c)	37,856	44,225
Advances to joint venture (note 14)		5,225
Other current assets	14,644	4,626
Total current assets	531,053	449,781
Restricted cash - long-term (note 7)		42,056
Vessels and equipment
At cost, less accumulated depreciation of $1,272,587 (December 31, 2014 - $1,202,663)	3,274,888	3,010,689
Advances on newbuilding contracts and conversion costs (notes 9b, 9c, 9d, 9f, 9g, 12a and 12b)	252,040	172,776
Net investments in direct financing leases (note 3b)	14,599	17,471
Investment in equity accounted joint ventures (note 14)	74,162	54,955
Derivative instruments (note 7)	5,240	4,660
Deferred tax asset	5,095	5,959
Other assets	75,224	51,362
Intangible assets - net	5,400	6,410
Goodwill	129,145	129,145
Total assets	4,366,846	3,945,264
Current
Accounts payable	12,902	15,064
Accrued liabilities (notes 7 and 11)	120,438	68,013
Deferred revenues	25,901	25,669
Due to affiliates (note 6c)	143,742	108,941
Current portion of derivative instruments (note 7)	106,588	85,318
Current portion of long-term debt (note 5)	466,952	258,014
Current portion of in-process revenue contracts	12,779	12,744
Total current liabilities	889,302	573,763
Long-term debt (note 5)	2,195,010	2,178,009
Derivative instruments (note 7)	236,208	257,754
In-process revenue contracts	69,450	75,805
Other long-term liabilities	60,033	44,238
Total liabilities	$ 3,450,003	$ 3,129,569
Commitments and contingencies (notes 5, 7, and 9)
Redeemable non-controlling interest (note 9a)	$ 10,481	$ 12,842
Equity
General Partner	20,457	21,038
Partners' equity	848,735	755,003
Non-controlling interests	57,627	47,850
Total equity	906,362	802,853
Total liabilities and equity	4,366,846	3,945,264
Common Stock Class Undefined [Member]
Equity
Limited partners	560,593	589,165
Preferred Units [Member]
Equity
Limited partners	$ 267,685	$ 144,800

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Total Capital and Net Income Per Common Unit

6 Months Ended

Jun. 30, 2015

Equity [Abstract]

Total Capital and Net Income Per Common Unit

10. Total Capital and Net Income Per Common Unit

At June 30, 2015, a total of 74.2% of the Partnership’s common units outstanding were held by the public. The remaining common units, as well as the 2% general partner interest, were held by a subsidiary of Teekay Corporation. All of the Partnership’s outstanding Series A Preferred Units (defined below), Series B Preferred Units (which were issued in April 2015) and Series C Preferred Units (which were issued in July 2015) are held by the public.

Net Income Per Common Unit

Limited partners’ interest in net income per common unit – basic is determined by dividing net income, after deducting the amount of net income attributable to the non-controlling interests, the general partner’s interest and the distributions on the Series A Preferred Units, the Series B Preferred Units and the Series C Preferred Units, by the weighted-average number of common units outstanding during the period. The distributions payable and paid on the preferred units for the three and six months ended June 30, 2015 were $4.8 million and $7.5 million, respectively, and $2.7 million and $5.4 million, respectively, for the three and six months ended June 30, 2014. The computation of limited partners’ interest in net income per common unit – diluted assumes the exercise of all dilutive restricted units using the treasury stock method. The computation of limited partners’ interest in net loss per common unit – diluted does not assume such exercises as the effect would be anti-dilutive.

The general partner’s and common unitholders’ interests in net income are calculated as if all net income was distributed according to the terms of the Partnership’s partnership agreement, regardless of whether those earnings would or could be distributed. The partnership agreement does not provide for the distribution of net income; rather, it provides for the distribution of available cash, which is a contractually defined term that generally means all cash on hand at the end of each quarter less the amount of cash reserves established by the Partnership’s board of directors to provide for the proper conduct of the Partnership’s business including reserves for maintenance and replacement capital expenditure, anticipated capital requirements and any accumulated distributions on, or redemptions of, the Series A Preferred Units, Series B Preferred Units and Series C Preferred Units. Unlike available cash, net income is affected by non-cash items such as depreciation and amortization, unrealized gains and losses on derivative instruments and unrealized foreign currency translation gains and losses.

During the three months ended June 30, 2015 and 2014, cash distributions exceeded $0.4025 per common unit and, consequently, the assumed distributions of net income resulted in the use of the increasing percentages to calculate the general partner’s interest in net income for the purposes of the net income per common unit calculation. For more information on the increasing percentages to calculate the general partner’s interest in net income, please refer to the Partnership’s Annual Report on Form 20-F for the year ended December 31, 2014.

Pursuant to the partnership agreement, allocations to partners are made on a quarterly basis.

Preferred Units

Pursuant to the partnership agreement, distributions on the 7.25% Series A Cumulative Redeemable Preferred Units (the Series A Preferred Units) to preferred unitholders are cumulative from the date of original issue and are payable quarterly in arrears, when, as and if declared by the board of directors of the general partner. At any time on or after April 30, 2018, the Series A Preferred Units may be redeemed by the Partnership at a redemption price of $25.00 per unit plus an amount equal to all accumulated and unpaid distributions to the date of redemption. These units are listed on the New York Stock Exchange.

In April 2015, the Partnership issued 5.0 million 8.50% Series B Cumulative Redeemable Preferred Units (the Series B Preferred Units) in a public offering for net proceeds of $120.8 million. Pursuant to the partnership agreement, distributions on the Series B Preferred Units to preferred unitholders are cumulative from the date of original issue and are payable quarterly in arrears, when, as and if declared by the board of directors of the general partner. At any time on or after April 20, 2020, the Series B Preferred Units may be redeemed by the Partnership at a redemption price of $25.00 per unit plus an amount equal to all accumulated and unpaid distributions to the date of redemption. These units are listed on the New York Stock Exchange.

See note 15b for information regarding the Partnership’s Series C Convertible Preferred Units.

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Document and Entity Information	6 Months Ended
	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Trading Symbol	TOO
Entity Registrant Name	Teekay Offshore Partners L.P.
Entity Central Index Key	0001382298
Current Fiscal Year End Date	--12-31

XML

Unit Based Compensation

6 Months Ended

Jun. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Unit Based Compensation

11. Unit Based Compensation

During the six months ended June 30, 2015, a total of 14,603 common units, with an aggregate value of $0.3 million, were granted and issued to the non-management directors of the general partner as part of their annual compensation for 2015.

The Partnership grants restricted unit-based compensation awards as incentive-based compensation to certain employees of Teekay Corporation’s subsidiaries that provide services to the Partnership. During March 2015 and 2014, the Partnership granted restricted unit-based compensation awards with respect to 101,543 and 67,569 units, respectively, with aggregate grant date fair values of $2.1 million for each period, based on the Partnership’s closing unit price on the grant dates. Each restricted unit is equal in value to one of the Partnership’s common units plus reinvested distributions from the grant date to the vesting date. Each award represents the specified number of the Partnership’s common units plus reinvested distributions from the grant date to the vesting date. The awards vest equally over three years from the grant date. Any portion of an award that is not vested on the date of a recipient’s termination of service is cancelled, unless their termination arises as a result of the recipient’s retirement and, in this case, the award will continue to vest in accordance with the vesting schedule. Upon vesting, the awards are paid to each grantee in the form of common units or cash.

During the six months ended June 30, 2015, restricted unit-based awards with respect to a total of 48,488 common units with a fair value of $1.5 million, based on the Partnership’s closing unit price on the grant date, vested and the amount paid to the grantees was made by issuing 12,612 common units and by paying $0.5 million in cash.

During the six months ended June 30, 2014, restricted unit-based awards with respect to a total of 20,988 common units with a fair value of $0.6 million, based on the Partnership’s closing unit price on the grant date, vested and the amount paid to the grantees was made by issuing 6,584 common units and by paying $0.3 million in cash.

The Partnership recorded unit-based compensation expense of $0.2 million and $0.5 million, during the three months ended June 30, 2015 and 2014, respectively, and $1.3 million and $1.9 million, during the six months ended June 30, 2015 and 2014, respectively, in general and administrative expenses in the Partnership’s consolidated statements of income (loss). As of June 30, 2015 and December 31, 2014, liabilities relating to cash settled restricted unit-based compensation awards of $1.0 million, were recorded in accrued liabilities on the Partnership’s consolidated balance sheets. As at June 30, 2015, the Partnership had $1.5 million of non-vested awards not yet recognized, which the Partnership expects to recognize over a weighted average period of 1.3 years.

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Unaudited Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands, shares in Millions	Jun. 30, 2015	Dec. 31, 2014
Accounts receivable non-trade	$ 5,382	$ 6,825
At cost, less accumulated depreciation	$ 1,272,587	$ 1,202,663
Common Stock Class Undefined [Member]
Limited partners - units issued	92.4	92.4
Limited partners - units outstanding	92.4	92.4
Preferred Units [Member]
Limited partners - units issued	11.0	6.0
Limited partners - units outstanding	11.0	6.0

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Long-Term Debt

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Long-Term Debt

5. Long-Term Debt

	June 30, 2015		December 31, 2014
	$		$
U.S. Dollar-denominated Revolving Credit Facilities due through 2019		560,504		544,969
Norwegian Kroner Bonds due through 2019		369,277		389,157
U.S. Dollar-denominated Term Loans due through 2018		137,378		158,547
U.S. Dollar-denominated Term Loans due through 2025		1,076,820		850,433
U.S. Dollar Non-Public Bond due through 2024		217,983		192,917
U.S. Dollar Bonds due through 2019		300,000		300,000
Total		2,661,962		2,436,023
Less current portion		466,952		258,014
Long-term portion		2,195,010		2,178,009

As at June 30, 2015, the Partnership had six long-term revolving credit facilities, which, as at such date, provided for total borrowings of up to $560.5 million, which were fully drawn as of June 30, 2015. The total amount available under the revolving credit facilities reduces by $70.5 million (remainder of 2015), $203.7 million (2016), $102.8 million (2017), $136.2 million (2018) and $47.3 million (2019). Four of the revolving credit facilities are guaranteed by the Partnership and certain of its subsidiaries for all outstanding amounts and contain covenants that require the Partnership to maintain the greater of a minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) of at least $75.0 million and 5.0% of the Partnership’s total consolidated debt. Two revolving credit facilities are guaranteed by Teekay Corporation and contain covenants that require Teekay Corporation to maintain the greater of a minimum liquidity (cash and cash equivalents) of at least $50.0 million and 5.0% of Teekay Corporation’s total consolidated debt which has recourse to Teekay Corporation. The revolving credit facilities are collateralized by first-priority mortgages granted on 20 of the Partnership’s vessels, together with other related security.

In January 2014, the Partnership issued Norwegian Kroner (or NOK) 1,000 million in senior unsecured bonds that mature in January 2019 in the Norwegian bond market. As of June 30, 2015, the carrying amount of the bonds was $127.3 million. The bonds are listed on the Oslo Stock Exchange. The interest payments on the bonds are based on NIBOR plus a margin of 4.25%. The Partnership entered into a cross currency swap to swap all interest and principal payments into US Dollars, with the interest payments fixed at a rate of 6.42%, and the transfer of the principal amount fixed at $162.2 million upon maturity in exchange for NOK 1,000 million (see note 7).

In January 2013, the Partnership issued NOK 1,300 million in senior unsecured bonds in the Norwegian bond market. The bonds were issued in two tranches maturing in January 2016 (NOK 500 million) and January 2018 (NOK 800 million). As at June 30, 2015, the carrying amount of the bonds was $165.5 million. The bonds are listed on the Oslo Stock Exchange. Interest payments on the tranche maturing in 2016 are based on NIBOR plus a margin of 4.00%. Interest payments on the tranche maturing in 2018 are based on NIBOR plus a margin of 4.75%. The Partnership entered into cross currency rate swaps to swap all interest and principal payments into US Dollars, with interest payments fixed at a rate of 4.94% on the tranche maturing in 2016 and 6.07% on the tranche maturing in 2018 and the transfer of the principal amount fixed at $89.7 million upon maturity in exchange for NOK 500 million on the tranche maturing in 2016 and fixed at $143.5 million upon maturity in exchange for NOK 800 million on the tranche maturing in 2018 (see note 7).

In January 2012, the Partnership issued NOK 600 million in senior unsecured bonds that mature in January 2017 in the Norwegian bond market. As at June 30, 2015, the carrying amount of the bonds was $76.4 million. The bonds are listed on the Oslo Stock Exchange. The interest payments on the bonds are based on NIBOR plus a margin of 5.75%. The Partnership entered into a cross currency rate swap to swap all interest and principal payments into U.S. dollars, with the interest payments fixed at a rate of 7.49%, and the transfer of the principal amount fixed at $101.4 million upon maturity in exchange for NOK 600 million (see note 7).

As at June 30, 2015, three of the Partnership’s 50%-owned subsidiaries each had an outstanding term loan, which totaled $137.4 million. The term loans reduce over time with quarterly and semi-annual payments and have varying maturities through 2018. These term loans are collateralized by first-priority mortgages on the three shuttle tankers to which the loans relate, together with other related security. As at June 30, 2015, the Partnership had guaranteed $33.9 million of these term loans, which represents its 50% share of the outstanding term loans of two of these 50%-owned subsidiaries. The other owner and Teekay Corporation have guaranteed $68.7 million and $34.8 million, respectively.

As at June 30, 2015, the Partnership had term loans outstanding for the shuttle tankers the Amundsen Spirit, the Nansen Spirit, the Peary Spirit, the Scott Spirit, the Samba Spirit and the Lambada Spirit, for the Suksan Salamander FSO unit, for the Piranema Spirit and the Voyageur Spirit FPSO units, for the ALP Guard, the ALP Winger, the ALP Centre, the ALP Ippon, and the ALP Ace towing vessels, and for the Arendal Spirit UMS, which totaled $1.1 billion. For the term loans relating to the Amundsen Spirit and the Nansen Spirit, one tranche reduces in semi-annual payments while the other tranche correspondingly is drawn up every six months with final bullet payments of $29.0 million due in 2022 and $29.1 million due in 2023, respectively. The other term loans reduce over time with quarterly or semi-annual payments. These term loans have varying maturities through 2025 and are collateralized by first-priority mortgages on the vessels to which the loans relate, together with other related security. As at June 30, 2015, the Partnership had guaranteed $768.4 million of these term loans and Teekay Corporation had guaranteed $308.4 million.

In February 2015, the Partnership issued $30.0 million in senior  bonds that mature in June 2024 in a U.S. private placement. As of June 30, 2015, the carrying amount of the bonds was $28.9 million. The interest payments on the bonds are fixed at a rate of 4.27%. The bonds are collateralized by first-priority mortgage on the Dampier Spirit FSO unit to which the bonds relate, together with other related security.

In August 2014, the Partnership assumed Logitel’s obligations under a bond agreement from Sevan Marine ASA (or Sevan) as part of the Logitel acquisition. The bonds are retractable at par at any time by the Partnership. As of June 30, 2015, the carrying amount of the bonds was $28.2 million.

In September 2013 and November 2013, the Partnership issued a total of $174.2 million of ten-year senior unsecured bonds that mature in December 2023 and that were issued in a U.S. private placement to finance the Bossa Nova Spirit and the Sertanejo Spirit shuttle tankers. The bonds accrue interest at a fixed combined rate of 4.96%. The bonds are collateralized by first-priority mortgages on the two vessels to which the bonds relate, together with other related security. The Partnership makes semi-annual repayments on the bonds and as of June 30, 2015, the carrying amount of the bonds was $160.8 million.

In May 2014, the Partnership issued $300.0 million in five-year senior unsecured bonds that mature in July 2019 in the U.S. bond market. As of June 30, 2015, the carrying amount of the bonds was $300.0 million. The bonds are listed on the New York Stock Exchange. The interest payments on the bonds are fixed at a rate of 6.0%.

Interest payments on the revolving credit facilities and the term loans are based on LIBOR plus margins. At June 30, 2015 and December 31, 2014, the margins ranged between 0.3% and 3.25%. The weighted-average effective interest rate on the Partnership’s variable rate long-term debt as at June 30, 2015 was 3.3% (December 31, 2014 - 3.5%). This rate does not include the effect of the Partnership’s interest rate swaps (see note 7).

The aggregate annual long-term debt principal repayments required to be made subsequent to June 30, 2015 are $164.0 million (remainder of 2015), $441.3 million (2016), $457.0 million (2017), $476.1 million (2018), $602.0 million (2019), and $521.6 million (thereafter).

The Partnership and a subsidiary of Teekay Corporation are borrowers under a loan arrangement and are jointly and severally liable for the obligations to the lender. The obligations resulting from long-term debt joint and several liability arrangements are measured at the sum of the amount the Partnership agreed to pay, on the basis of its arrangement with the co-obligor, and any additional amount the Partnership expects to pay on behalf of the co-obligor. As of June 30, 2015, this loan arrangement had an outstanding balance of $86.6 million, of which $51.6 million was the Partnership’s obligation. Teekay Corporation has indemnified the Partnership in respect of any losses and expenses arising from any breach by the co-obligor of the terms and conditions of the loan facility.

Obligations under the Partnership’s credit facilities are secured by certain vessels, and if the Partnership is unable to repay debt under the credit facilities, the lenders could seek to foreclose on those assets. The Partnership has two revolving credit facilities and two term loans that require the Partnership to maintain vessel values to drawn principal balance ratios of a minimum range of 105% to 125%. As at June 30, 2015, these ratios ranged from 133% to 204%. The vessel values used in these ratios are appraised values provided by third parties where available, or are prepared by the Partnership based on second-hand sale and purchase market data. Changes in the conventional or shuttle tanker, towing or UMS markets could negatively affect these ratios.

As at June 30, 2015, the Partnership and Teekay Corporation were in compliance with all covenants related to the credit facilities and long-term debt.

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Segment Reporting

6 Months Ended

Jun. 30, 2015

Segment Reporting [Abstract]

Segment Reporting

4. Segment Reporting

The following table includes results for the Partnership’s shuttle tanker segment; floating production, storage and off-loading (or FPSO) unit segment; floating storage and off-take (or FSO) unit segment; conventional tanker segment; towage segment; and UMS segment for the periods presented in these consolidated financial statements.

Three months ended June 30, 2015	Shuttle Tanker Segment			FPSO Segment			FSO Segment			Conventional Tanker Segment			Towage Segment			UMS Segment (1)			Total
Revenues		132,899			86,246			14,165			8,245			10,517			3,686			255,758
Voyage expenses		(18,976	)		—			(89	)		(647	)		(1,004	)		—			(20,716	)
Vessel operating expenses		(31,120	)		(33,557	)		(6,921	)		(1,514	)		(3,697	)		(1,126	)		(77,935	)
Time-charter hire expense		(10,762	)		—			—			—			—			—			(10,762	)
Depreciation and amortization		(26,795	)		(19,844	)		(2,975	)		(1,675	)		(2,174	)		(401	)		(53,864	)
General and administrative (2)		(6,788	)		(5,011	)		(420	)		(507	)		(837	)		(639	)		(14,202	)
Write down of vessel		—			—			—			—			—			(500	)		(500	)
Restructuring charge		(135	)		—			—			—			—			—			(135	)
Income from vessel operations		38,323			27,834			3,760			3,902			2,805			1,020			77,644
Three months ended June 30, 2014	Shuttle Tanker Segment			FPSO Segment			FSO Segment			Conventional Tanker Segment			Towage Segment			Total
Revenues		137,042			83,984			11,673			8,600			103			241,402
Voyage expenses		(24,913	)		—			(149	)		(1,188	)		(6	)		(26,256	)
Vessel operating expenses		(39,715	)		(39,472	)		(7,532	)		(1,465	)		—			(88,184	)
Time-charter hire expense		(4,975	)		—			—			—			—			(4,975	)
Depreciation and amortization		(27,378	)		(18,186	)		(1,298	)		(1,612	)		—			(48,474	)
General and administrative (2)		(6,532	)		(7,989	)		(1,027	)		(312	)		(2,194	)		(18,054	)
Restructuring recovery (3)		821			—			—			—			—			821
Income (loss) from vessel operations		34,350			18,337			1,667			4,023			(2,097	)		56,280
Six months ended June 30, 2015	Shuttle Tanker Segment			FPSO Segment			FSO Segment			Conventional Tanker Segment			Towage Segment			UMS Segment (1)			Total
Revenues		270,989			170,449			28,651			16,307			16,587			3,686			506,669
Voyage expenses		(38,505	)		—			(221	)		(1,215	)		(3,292	)		—			(43,233	)
Vessel operating expenses		(65,437	)		(64,790	)		(13,280	)		(2,888	)		(4,448	)		(1,126	)		(151,969	)
Time-charter hire expense		(17,083	)		—			—			—			(662	)		—			(17,745	)
Depreciation and amortization		(55,162	)		(39,939	)		(5,895	)		(3,349	)		(2,722	)		(401	)		(107,468	)
General and administrative (2)		(15,187	)		(9,813	)		(1,030	)		(759	)		(1,147	)		(1,146	)		(29,082	)
(Write down) and gain on sale of vessel		(13,853	)		—			—			—			—			(500	)		(14,353	)
Restructuring charge		(135	)		—			—			—			—			—			(135	)
Income from vessel operations		65,627			55,907			8,225			8,096			4,316			513			142,684
Six months ended June 30, 2014	Shuttle Tanker Segment			FPSO Segment (5)			FSO Segment			Conventional Tanker Segment			Towage Segment			Total
Revenues		290,222			167,121			25,962			17,228			103			500,636
Voyage expenses		(56,619	)		—			(172	)		(2,913	)		(6	)		(59,710	)
Vessel operating expenses		(80,121	)		(79,863	)		(13,405	)		(2,925	)		—			(176,314	)
Time-charter hire expense		(16,387	)		—			—			—			—			(16,387	)
Depreciation and amortization		(54,659	)		(36,089	)		(2,991	)		(3,223	)		—			(96,962	)
General and administrative (2)(4)		(13,142	)		(13,747	)		(1,886	)		(845	)		(3,283	)		(32,903	)
Restructuring recovery (3)		262			—			—			—			—			262
Income (loss) from vessel operations		69,556			37,422			7,508			7,322			(3,186	)		118,622

(1) The Partnership acquired 100% of the outstanding shares of Logitel during the third quarter of 2014 (see notes 3a and 12b).

(2) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources).

(3) Restructuring recovery of $0.8 million for the three and six months ended June 30, 2014 related to a reimbursement received during the second quarter of 2014, for the reorganization of the Partnership’s shuttle tanker marine operations, which were completed during 2013. Restructuring charge of $0.6 million for the six months ended June 30, 2014 related to the reflagging of one shuttle tanker which commenced in January 2014 and was completed in March 2014.

(4) Includes a $1.6 million business development fee to Teekay Corporation in connection with the acquisition of ALP Maritime Services B.V. (or ALP), for the six months ended June 30, 2014 in the towage segment (see notes 6b and 12a ).

(5) Income from vessel operations for the six months ended June 30, 2014 excludes $3.1 million of the Voyageur Spirit FPSO unit indemnification payments received by the Partnership from Teekay Corporation relating to the production shortfall during the period January 1, 2014 through February 21, 2014 and a further $0.4 million relating to unreimbursed vessel operating expenses incurred before the unit was declared on-hire as of February 22, 2014. These indemnification payments received by the Partnership from Teekay Corporation have effectively been treated as a reduction to the purchase price of the Voyageur Spirit (see note 6f).

A reconciliation of total segment assets to total assets presented in the accompanying consolidated balance sheets is as follows:

	June 30, 2015		December 31, 2014
	$		$
Shuttle tanker segment		1,827,194		1,936,809
FPSO segment		1,259,634		1,267,076
FSO segment		267,157		133,925
Conventional tanker segment		138,235		150,109
Towage segment		260,047		61,795
UMS segment		287,930		62,017
Unallocated:
Cash and cash equivalents and restricted cash		316,464		298,898
Other assets		10,185		34,635
Consolidated total assets		4,366,846		3,945,264

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Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation

The unaudited interim consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP). These financial statements include the accounts of Teekay Offshore Partners L.P., which is a limited partnership organized under the laws of the Republic of The Marshall Islands, and its wholly owned or controlled subsidiaries (collectively, the Partnership).

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Certain information and footnote disclosures required by GAAP for complete annual financial statements have been omitted and, therefore, these interim financial statements should be read in conjunction with the Partnership’s audited consolidated financial statements for the year ended December 31, 2014, which are included in the Partnership’s Annual Report on Form 20-F, filed with the U.S. Securities and Exchange Commission (or SEC) on April 2, 2015. In the opinion of management of the Partnership’s general partner, Teekay Offshore GP L.L.C. (or the General Partner), these interim unaudited consolidated financial statements reflect all adjustments, which are of a normal recurring nature, necessary to present fairly, in all material respects, the Partnership’s consolidated financial position, results of operations, changes in total equity and cash flows for the interim periods presented. The results of operations for the interim periods presented are not necessarily indicative of those for a full fiscal year. Historically, the utilization of shuttle tankers in the North Sea is higher in the winter months as favorable weather conditions in the summer months provide opportunities for repairs and maintenance to our vessels and the offshore oil platforms. Downtime for repairs and maintenance generally reduces oil production and, thus, transportation requirements. Significant intercompany balances and transactions have been eliminated upon consolidation.

The Partnership presents non-controlling ownership interests in subsidiaries in the consolidated financial statements within the equity section, but separate from the Partners’ equity. However, the holder of the non-controlling interest of one of the Partnership’s subsidiaries holds a put option which, if exercised, would obligate the Partnership to purchase the non-controlling interest (see note 9a). As a result, the non-controlling interest that is subject to this redemption feature is not included on the Partnership’s consolidated balance sheet as part of the total equity and is presented as redeemable non-controlling interest above the equity section but below the liabilities section on the Partnership’s consolidated balance sheet.

Accounting Pronouncements

Accounting Pronouncements

In April 2014, the Financial Accounting Standards Board (or FASB) issued Accounting Standards Update 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity (or ASU 2014-08), which raises the threshold for disposals to qualify as discontinued operations. A discontinued operation is now defined as: (i) a component of an entity or group of components that has been disposed of or classified as held for sale and represents a strategic shift that has or will have a major effect on an entity’s operations and financial results; or (ii) an acquired business that is classified as held for sale on the acquisition date. ASU 2014-08 also requires additional disclosures regarding discontinued operations, as well as material disposals that do not meet the definition of discontinued operations. ASU 2014-08 was adopted on January 1, 2015. The impact, if any, of adopting ASU 2014-08 on the Partnership’s financial statements will depend on the occurrence and nature of disposals that occur after ASU 2014-08 is adopted.

In May 2014, the FASB issued Accounting Standards Update 2014-09, Revenue from Contracts with Customers (or ASU 2014-09). ASU 2014-09 will require an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This update creates a five-step model that requires entities to exercise judgment when considering the terms of the contract(s) which include (i) identifying the contract(s) with the customer, (ii) identifying the separate performance obligations in the contract, (iii) determining the transaction price, (iv) allocating the transaction price to the separate performance obligations, and (v) recognizing revenue as each performance obligation is satisfied. ASU 2014-09 is effective for interim and annual periods beginning after December 15, 2016 and shall be applied, at the Partnership’s option, retrospectively to each period presented or as a cumulative-effect adjustment as of the date of adoption. Early adoption is not permitted. The Partnership is evaluating the effect of adopting this new accounting guidance.

In February 2015, the FASB issued Accounting Standards Update 2015-02, Amendments to the Consolidation Analysis (or ASU 2015-02) which eliminates the deferral of certain consolidation standards for entities considered to be investment companies, modifies the consolidation analysis performed on limited partnerships and modifies the impact of fee arrangements and related parties on the determination of the primary beneficiary of a variable interest entity. ASU 2015-02 is effective for interim and annual periods beginning after December 15, 2015. ASU 2015-02 may be applied using a modified retrospective approach by recording a cumulative-effect adjustment to equity as of the beginning of the fiscal year of adoption. A reporting entity also may apply ASU 2015-02 retrospectively. The Partnership is evaluating the effect of adopting this new accounting guidance.

In April 2015, the FASB issued Accounting Standards Update 2015-03, Simplifying the Presentation of Debt Issuance Costs (or ASU 2015-03) which require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. ASU 2015-03 is effective for interim and annual periods beginning after December 15, 2015 and is to be applied on a retrospective basis. The Partnership is evaluating the effect of adopting this new accounting guidance.

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Acquisitions

6 Months Ended

Jun. 30, 2015

Business Combinations [Abstract]

Acquisitions

12. Acquisitions

a) Acquisition of ALP Maritime Services B.V.

On March 14, 2014, the Partnership acquired 100% of the shares of ALP. Concurrently with this transaction, the Partnership and ALP entered into an agreement with Niigata Shipbuilding & Repair of Japan for the construction of four state-of-the-art SX-157 Ulstein Design ultra-long distance towing and offshore installation vessel newbuildings. These vessels will be equipped with dynamic positioning capability and are scheduled for delivery in 2016. The Partnership is committed to acquire these newbuildings for a total cost of approximately $258 million (see note 9c).

The Partnership acquired ALP for a purchase price of $2.6 million, which was paid in cash, and also entered into an arrangement to pay additional compensation to three former shareholders of ALP if certain requirements are satisfied. This contingent compensation consists of $2.4 million, which is payable upon the delivery and employment of ALP’s four newbuildings, which are scheduled for delivery throughout 2016, and a further amount of up to $2.6 million, which is payable if ALP’s annual operating results from 2017 to 2021 meet certain targets. The Partnership has the option to pay up to 50% of this compensation through the issuance of common units of the Partnership. Each of the contingent compensation amounts are payable only if the three shareholders are employed by ALP at the time performance conditions are met. These contingent compensation costs were $0.2 million and $0.2 million, for the three months ended June 30, 2015 and 2014, respectively, and $0.3 million and $0.2 million, for the six months ended June 30, 2015 and 2014, respectively, and were recorded in general and administrative expenses in the Partnership’s consolidated statements of income (loss). The Partnership also incurred a $1.0 million fee to a third party associated with the acquisition of ALP in the first quarter of 2014 and a $1.6 million business development fee to Teekay Corporation in the second quarter of 2014 for assistance with the acquisition, which were recognized in general and administrative expenses during 2014.

The acquisition of ALP was accounted for using the purchase method of accounting, based upon finalized estimates of fair value.

The following table summarizes the finalized estimates of fair values of the ALP assets acquired and liabilities assumed by the Partnership on the acquisition date.

	As at March 14, 2014 $
ASSETS
Cash and cash equivalents		294
Other current assets		404
Advances on newbuilding contracts		164
Other assets - long-term		395
Goodwill (towage segment)		2,032
Total assets acquired		3,289
LIABILITIES
Current liabilities		387
Other long-term liabilities		286
Total liabilities assumed		673
Net assets acquired		2,616
Consideration		2,616

The goodwill recognized in connection with the ALP acquisition is attributable primarily to the assembled workforce of ALP, including the employees’ experience, skills and abilities. Operating results of ALP are reflected in the Partnership’s financial statements commencing March 14, 2014, the effective date of the acquisition. From the date of acquisition to June 30, 2014, the Partnership recognized $0.2 million of revenue and $1.7 million of net loss resulting from this acquisition. The following table shows summarized consolidated pro forma financial information for the Partnership for the six months ended June 30, 2014, solely giving effect to the Partnership’s acquisition of ALP as if it had taken place on January 1, 2013:

	Pro Forma Six Months ended June 30, 2014 $
Revenues		500,771
Net income		5,061
Limited partners’ interest in net income per common unit:
- Basic		(0.13	)
- Diluted		(0.13	)

b) Acquisition of Logitel Offshore Holding AS

On August 11, 2014, the Partnership acquired 100% of the outstanding shares of Logitel. The purchase price for the shares of Logitel consisted of $4.0 million in cash paid at closing and a potential additional cash amount of $27.6 million, subject to reductions of some or all of this potential additional amount if certain performance criteria are not met, primarily relating to the construction of the three UMS ordered from COSCO in China (see note 3a).

The Partnership committed to acquire three UMS ordered from COSCO for a total cost of approximately $580 million, including estimated site supervision costs and license fees to be paid to Sevan to allow for use of its cylindrical hull design in these UMS (see note 9d), and $30.0 million from the Partnership’s assumption of Logitel’s obligations under a bond agreement from Sevan. Prior to the acquisition, Logitel secured a three-year fixed-rate charter contract, plus extension options, with Petrobras in Brazil for the first UMS, the Arendal Spirit, which delivered in February 2015 and commenced its contract with Petrobras during the second quarter of 2015. The second UMS is currently under construction and in August 2014, the Partnership exercised one of its existing six options with COSCO to construct a third UMS. During the second quarter of 2015, the Partnership exercised its option to defer the delivery of its second UMS newbuilding by up to one year. During this period, COSCO will maintain and preserve this unit for the account of the Partnership, including the Partnership incurring interest at 5.0% per annum on the unpaid balance of the final yard installment. In addition, the Partnership exercised its option to defer the delivery and all related construction work of its third UMS by 120 days. The Partnership expects to secure charter contracts for the remaining two UMS newbuildings prior to their respective deferred deliveries in the third quarter of 2016 and the second quarter of 2017.

The Partnership has assumed Logitel’s obligations under a bond agreement from Sevan as part of this acquisition. The bond is non-interest bearing and is repayable in amounts of $10.0 million within six months of delivery of each of the three UMS ordered from COSCO, for a total of $30.0 million. If Logitel orders additional UMS with the Sevan cylindrical design, Logitel will be required to pay Sevan up to $11.9 million for each of the next three UMS ordered. If the fourth of six options with COSCO is not exercised by its option expiry date on November 30, 2016, Sevan has a one-time option to receive the remaining two options with COSCO.

The acquisition of Logitel was accounted for using the purchase method of accounting, based upon finalized estimates of fair value.

The following table summarizes the preliminary and finalized valuations of the Logitel assets and liabilities on the acquisition date. The estimates of fair values of the Logitel assets acquired and liabilities assumed by the Partnership were finalized during the second quarter of 2015.

(in thousands of U.S. dollars)	Preliminary Valuation August 11, 2014 $		Adjustments $			Final Valuation August 11, 2014 $
ASSETS
Cash and cash equivalents		8,089		—			8,089
Prepaid expenses		640		—			640
Advances on newbuilding contracts		46,809		(2,239	)		44,570
Intangible assets		—		1,000			1,000
Total assets acquired		55,538		(1,239	)		54,299
LIABILITIES
Accrued liabilities		4,098		—			4,098
Long-term debt		26,270		1,330			27,600
Total liabilities assumed		30,368		1,330			31,698
Net assets acquired		25,170		(2,569	)		22,601
Cash consideration		4,000		—			4,000
Contingent consideration		21,170		(2,569	)		18,601

Operating results of Logitel are reflected in the Partnership’s financial statements commencing August 11, 2014, the effective date of acquisition. The following table shows summarized consolidated pro forma financial information for the Partnership for the six months ended June 30, 2014, solely giving effect to the Partnership’s acquisition of Logitel as if it had taken place on January 1, 2013:

	Pro Forma Six Months ended June 30, 2014 $
Revenues		500,636
Net income		4,460
Limited partners’ interest in net income per common unit:
- Basic		(0.14	)
- Diluted		(0.14	)

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Income Tax

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Income Tax

8. Income Tax

The components of the provision for income tax are as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Current		(271	)		(415	)		(627	)		(1,668	)
Deferred		(82	)		233			(571	)		223
Income tax expense		(353	)		(182	)		(1,198	)		(1,445	)

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Commitments and Contingencies - Additional Information - Odebrecht (Detail) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Oct. 31, 2014	Jun. 30, 2015	Jul. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Payments made towards commitments		$ 34,503		$ 30,211
Odebrecht Oil And Gas Sa [Member]
Loss Contingencies [Line Items]
Percentage of interest in joint venture arrangement	50.00%
Operating lease arrangement period, lessor		12 years
Expected cost of project	$ 1,000,000
Payments made towards commitments		$ 129,700
Purchase obligation due (remainder of 2015)		356,200
Purchase obligation due in 2016		497,800
Purchase obligation due in 2017		25,500
Short-term loan secured by joint venture		$ 248,000
Subsequent Event [Member] | Odebrecht Oil And Gas Sa [Member]
Loss Contingencies [Line Items]
Secured short-term loan refinanced with long-term debt facility			$ 804,000

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Related Party Transactions and Balances

6 Months Ended

Jun. 30, 2015

Related Party Transactions [Abstract]

Related Party Transactions and Balances

6. Related Party Transactions and Balances

a) During the three and six months ended June 30, 2015, four conventional tankers, two shuttle tankers and three FSO units of the Partnership were employed on long-term time-charter-out or bareboat contracts with subsidiaries of Teekay Corporation.

b) Teekay Corporation and its wholly-owned subsidiaries provide substantially all of the Partnership’s commercial, technical, crew training, strategic, business development and administrative service needs. In addition, the Partnership reimburses the general partner for expenses incurred by the general partner that are necessary or appropriate for the conduct of the Partnership’s business. Such related party transactions were as follows for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Revenues (1)		17,490			16,427			34,819			33,757
Vessel operating expenses (2)		(10,412	)		(10,182	)		(19,850	)		(19,830	)
General and administrative (3)(4)		(8,235	)		(10,252	)		(16,062	)		(18,540	)
Interest expense (5)		(112	)		(112	)		(223	)		(223	)

(1) Includes revenue from time-charter-out or bareboat contracts with subsidiaries or affiliates of Teekay Corporation, including management fees from ship management services provided by the Partnership to a subsidiary of Teekay Corporation.

(2) Includes ship management and crew training services provided by Teekay Corporation.

(3) Includes commercial, technical, strategic, business development and administrative management fees charged by Teekay Corporation and reimbursements to Teekay Corporation and our general partner for costs incurred on the Partnership’s behalf.

(4) Includes a $1.6 million business development fee paid to Teekay Corporation in connection with the acquisition of ALP during the three and six months ended June 30, 2014.

(5) Includes a guarantee fee related to the final bullet payment of the Piranema Spirit FPSO debt facility guaranteed by Teekay Corporation and interest expense incurred on due to affiliates balances.

c) At June 30, 2015, due from affiliates totaled $37.9 million (December 31, 2014 - $44.2 million) and due to affiliates totaled $143.7 million (December 31, 2014 - $108.9 million). Due to and from affiliates are non-interest bearing and unsecured, and are expected to be settled within the next fiscal year in the normal course of operations.

d) In May 2013, the Partnership entered into a ten-year charter contract, plus extension options, with Salamander Energy plc (or Salamander) to supply an FSO unit in Asia. The Partnership converted its 1993-built shuttle tanker, the Navion Clipper, into an FSO unit, which commenced its charter contract with Salamander in August 2014. The Partnership received project management and execution services from certain subsidiaries of Teekay Corporation relating to the FSO conversion. These costs were capitalized and are included in vessels and equipment. Project management and execution costs paid to Teekay Corporation subsidiaries amounted to $3.5 million.

e) In May 2013, the Partnership entered into an agreement with Statoil ASA (or Statoil), on behalf of the field license partners, to provide an FSO unit for the Gina Krog oil and gas field located in the North Sea. The contract will be serviced by a new FSO unit that is being converted from the Randgrid shuttle tanker, which the Partnership currently owns through a 67%-owned subsidiary and which the Partnership intends to acquire full ownership (note 9a) prior to its conversion. The Partnership received project management and engineering services from certain subsidiaries of Teekay Corporation relating to this FSO unit conversion. These costs are capitalized and included as part of advances on newbuilding contracts and will be reclassified to vessels and equipment upon completion of the conversion in early-2017. Project management and engineering costs paid to Teekay Corporation subsidiaries amounted to $3.7 million as of June 30, 2015.

f) On May 2, 2013, the Partnership acquired from Teekay Corporation its 100% interest in Voyageur LLC, which owns the Voyageur Spirit FPSO unit, which operates on the Huntington Field in the North Sea under a five-year contract, plus up to 10 one-year extension options, with E.ON Ruhrgas UK GP Limited (or E.ON), for an original purchase price of $540.0 million. Due to a defect encountered in one of its two gas compressors, the FPSO unit was unable to achieve final acceptance by E.ON within the allowable timeframe, resulting in the FPSO unit being declared off-hire by the charterer retroactive to April 13, 2013.

On September 30, 2013, the Partnership entered into an interim agreement with E.ON whereby the Partnership was compensated for production beginning August 27, 2013 until the receipt of final acceptance by E.ON. Until receipt of final acceptance, Teekay Corporation agreed to indemnify the Partnership for certain production shortfalls and unreimbursed vessel operating expenses. For the period from April 13, 2013 to December 31, 2013, Teekay Corporation indemnified the Partnership a total of $34.9 million for production shortfalls and unreimbursed repair costs. During 2014, Teekay Corporation indemnified the Partnership for a further $3.5 million for production shortfalls and unrecovered repair costs to address the compressor issues, and paid another $2.7 million in late-2014 relating to a final settlement of pre-acquisition capital expenditures for the Voyageur Spirit FPSO unit. On April 4, 2014, the Partnership received the certificate of final acceptance from the charterer, which declared the unit on-hire retroactive to February 22, 2014.

Amounts paid as indemnification from Teekay Corporation to the Partnership were effectively treated as a reduction in the purchase price paid by the Partnership for the FPSO unit. The original purchase price of $540.0 million has effectively been reduced to $503.1 million ($273.1 million net of assumed debt of $230.0 million) to reflect total indemnification payments from Teekay Corporation of $41.1 million, partially offset by the excess value of $4.3 million relating to the 1.4 million common units the Partnership issued as part of the purchase price to Teekay Corporation on the date of closing of the transaction in May 2013 compared to the value of the common units at the date Teekay Corporation offered to sell the FPSO unit to the Partnership. The excess of the purchase price (net of assumed debt) over the book value of the net assets of $201.8 million has been accounted for as an equity distribution to Teekay Corporation of $71.4 million.

g) On June 10, 2013, the Partnership acquired Teekay Corporation’s 50% interest in OOG-TKP FPSO GmbH & Co KG, a joint venture with Odebrecht Oil & Gas S.A (or Odebrecht), which owns the Cidade de Itajai (or Itajai) FPSO unit, for a cash purchase price of $53.8 million. The Partnership’s investment in the Itajai FPSO unit is accounted for using the equity method.

The purchase price was based on an estimate of the fully built-up cost of the Itajai FPSO unit, including certain outstanding contractual items. During 2014, the joint venture received in connection with the resolution of these contractual items an aggregate of $6.1 million in reimbursements from the charterer and insurer, which was originally deducted from the Partnership’s purchase price of the Itajai FPSO unit. Accordingly, the Partnership remitted this reimbursed amount to Teekay Corporation.

h) The long-term bareboat contracts relating to two conventional tankers of the Partnership with a joint venture in which Teekay Corporation has a 50% interest were novated under the same terms to a subsidiary of Teekay Corporation in January 2014 and March 2014, respectively. The excess of the contractual rates over the market rates at the time of the novations were $0.3 million and $0.6 million, respectively, for the three and six months ended June 30, 2015, and $0.3 million and $0.4 million, respectively, for the three and six months ended June 30, 2014, and are accounted for as an equity contributions from Teekay Corporation.

i) In December 2014, the Partnership entered into an agreement with a consortium led by Queiroz Galvão Exploração e Produção SA (or QGEP) to provide an FPSO unit for the Atlanta field located in the Santos Basin offshore Brazil. In connection with the contract with QGEP, the Partnership acquired the Petrojarl I FPSO from Teekay Corporation for a purchase price of $57 million. The purchase price was financed by means of an intercompany loan payable to a subsidiary of Teekay Corporation, which was repaid in July, 2015. Interest payments on the loan are based on a fixed rate of 6.5%. The Petrojarl I is currently undergoing upgrades at the Damen Shipyard Group’s DSR Schiedam Shipyard in the Netherlands for an estimated cost of approximately $231 million, which includes the cost of acquiring the Petrojarl I. The excess of the purchase price over Teekay Corporation’s carrying value of the Petrojarl I FPSO unit has been accounted for as an equity distribution to Teekay Corporation of $12.4 million in 2014.

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Derivative Instruments and Hedging Activities

6 Months Ended

Jun. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

7. Derivative Instruments and Hedging Activities

The Partnership uses derivatives to manage certain risks in accordance with its overall risk management policies.

Foreign Exchange Risk

The Partnership economically hedges portions of its forecasted expenditures denominated in foreign currencies with foreign currency forward contracts. The Partnership has not designated, for accounting purposes, any of the foreign currency forward contracts held during the six months ended June 30, 2015 as cash flow hedges.

As at June 30, 2015, the Partnership was committed to the following foreign currency forward contracts:

	Contract Amount		Fair Value / Carrying
	in Foreign		Amount of Asset (Liability)			Average		Expected Maturity
	Currency		(in thousands of U.S. Dollars)			Forward		2015		2016		2017
	(thousands)		Non-hedge			Rate (1)		(in thousands of U.S. Dollars)
Norwegian Kroner		608,500		(9,610	)		7.01		35,217		46,632		4,905
Euro		23,137		(593	)		0.88		24,011		2,413		—
Singapore Dollar		22,442		53			1.35		—		16,537		—
				(10,150	)

(1) Average forward rate represents the contracted amount of foreign currency one U.S. Dollar will buy.

In connection with its issuance of NOK bonds, the Partnership has entered into cross currency swaps pursuant to which it receives the principal amount in NOK on the maturity date of the swap, in exchange for payment of a fixed U.S. Dollar amount. In addition, the cross currency swaps exchange a receipt of floating interest in NOK based on NIBOR plus a margin for a payment of U.S. Dollar fixed interest. The purpose of the cross currency swaps is to economically hedge the foreign currency exposure on the payment of interest and principal at maturity of the Partnership’s NOK bonds due from 2016 through 2019. In addition, the cross currency swaps due from 2016 through 2019 economically hedge the interest rate exposure on the NOK bonds due from 2016 through 2019. The Partnership has not designated, for accounting purposes, these cross currency swaps as cash flow hedges of its NOK bonds due from 2016 through 2019. As at June 30, 2015, the Partnership was committed to the following cross currency swaps:

											Fair Value /			Remaining Term (years)
Notional Amount		Principal Amount		Floating Rate Receivable				Fixed Rate Payable			Carrying Amount of
NOK		USD		Reference Rate	Margin						Asset (Liability)
(thousands)		(thousands)									$
	600,000		101,351	NIBOR		5.75	%		7.49	%		(28,252	)		1.6
	500,000		89,710	NIBOR		4.00	%		4.94	%		(26,776	)		0.6
	800,000		143,536	NIBOR		4.75	%		6.07	%		(44,925	)		2.6
	1,000,000		162,200	NIBOR		4.25	%		6.42	%		(40,604	)		3.6
												(140,557	)

Interest Rate Risk

The Partnership enters into interest rate swaps, which exchange a receipt of floating interest for a payment of fixed interest to reduce the Partnership’s exposure to interest rate variability on its outstanding floating-rate debt. The Partnership has not designated, for accounting purposes, its interest rate swaps as cash flow hedges of its U.S. Dollar LIBOR-denominated borrowings.

As at June 30, 2015, the Partnership was committed to the following interest rate swap agreements:

	Interest Rate Index	Notional Amount $		Fair Value / Carrying Amount of Asset (Liability) $			Weighted- Average Remaining Term (years)		Fixed Interest Rate (%) (1)
U.S. Dollar-denominated interest rate swaps (2)	LIBOR		600,000		(142,385	)		10.3		4.8
U.S. Dollar-denominated interest rate swaps (3)	LIBOR		879,709		(42,431	)		5.9		2.5
U.S. Dollar-denominated interest rate swaps (4)	LIBOR		180,000		(9,436	)		0.1		3.4
			1,659,709		(194,252	)

(1) Excludes the margin the Partnership pays on its variable-rate debt, which as at June 30, 2015, ranged between 0.30% and 3.25%

(2) Notional amount remains constant over the term of the swap.

(3) Principal amount reduces quarterly or semi-annually.

(4) The interest rate swap is being used to economically hedge expected interest payments on new debt that is planned to be outstanding from 2016 to 2028. The interest rate swap is subject to mandatory early termination in July 2015 whereby the swap will be settled based on its fair value at that time. Subsequent to June 30, 2015, $90.0 million of this interest rate swap was terminated in July 2015 and the remaining $90.0 million was rolled over until August 21, 2015.

As at June 30, 2015, the Partnership had multiple interest rate swaps and cross currency swaps governed by the same master agreement. Each of these master agreements provides for the net settlement of all swaps subject to that master agreement through a single payment in the event of default or termination of any one swap. The fair value of these interest rate swaps are presented on a gross basis in the Partnership’s consolidated balance sheets. As at June 30, 2015, these interest rate swaps and cross currency swaps had an aggregate fair value liability amount of $304.0 million. As at June 30, 2015, the Partnership had $31.6 million on deposit with the relevant counterparties as security for swap liabilities under certain master agreements. The deposit is presented in restricted cash and restricted cash - long-term on the consolidated balance sheets.

Tabular disclosure

The following table presents the location and fair value amounts of the assets (liabilities) of the Partnership’s derivative instruments, segregated by type of contract, on the Partnership’s balance sheets.

	Derivative Assets $		Accrued Liabilities $			Current Portion of Derivative Liabilities $			Derivative Liabilities $
As at June 30, 2015
Foreign currency contracts		430		—			(9,067	)		(1,513	)
Cross currency swaps		—		(1,483	)		(33,648	)		(105,426	)
Interest rate swaps		4,810		(5,920	)		(63,873	)		(129,269	)
		5,240		(7,403	)		(106,588	)		(236,208	)

As at December 31, 2014
Foreign currency contracts	—	—		(8,490	)	(2,778	)
Cross currency swaps	—	(1,105	)	(6,496	)	(112,902	)
Interest rate swaps	4,660	(8,742	)	(70,332	)	(142,074	)
	4,660	(9,847	)	(85,318	)	(257,754	)

Realized and unrealized gains (losses) of interest rate swaps and foreign currency forward contracts that are not designated for accounting purposes as cash flow hedges are recognized in earnings and reported in realized and unrealized gains (losses) on derivative instruments in the consolidated statements of income (loss). The effect of the losses on these derivatives on the consolidated statements of income (loss) is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Realized (losses) gains relating to:
Interest rate swaps		(11,775	)		(13,997	)		(24,073	)		(28,060	)
Foreign currency forward contracts		(2,571	)		196			(5,824	)		(302	)
		(14,346	)		(13,801	)		(29,897	)		(28,362	)
Unrealized gains (losses) relating to:
Interest rate swaps		50,415			(22,985	)		19,414			(47,093	)
Foreign currency forward contracts		6,213			(1,358	)		1,117			679
		56,628			(24,343	)		20,531			(46,414	)
Total realized and unrealized gains (losses) on derivative instruments		42,282			(38,144	)		(9,366	)		(74,776	)

Realized and unrealized gains (losses) of the cross currency swaps are recognized in earnings and reported in foreign currency exchange gain (loss) in the consolidated statements of income (loss). The effect of the gain (loss) on cross currency swaps on the consolidated statements of income (loss) is as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Realized losses		(1,953	)		(38	)		(4,333	)		(22	)
Unrealized gains (losses)		12,525			(14,267	)		(19,676	)		(6,692	)
Total realized and unrealized gains (losses) on currency swaps		10,572			(14,305	)		(24,009	)		(6,714	)

The Partnership is exposed to credit loss in the event of non-performance by the counterparties, all of which are financial institutions, to the foreign currency forward contracts and the interest rate swap agreements. In order to minimize counterparty risk, the Partnership only enters into derivative transactions with counterparties that are rated A- or better by Standard & Poor’s or A3 or better by Moody’s at the time of the transactions. In addition, to the extent possible and practical, interest rate swaps are entered into with different counterparties to reduce concentration risk.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

9. Commitments and Contingencies

a) During 2010, an unrelated party contributed a 1995-built shuttle tanker, the Randgrid, to a subsidiary of the Partnership for a 33% equity interest in the subsidiary. The non-controlling interest owner in the subsidiary holds a put option which, if exercised, would obligate the Partnership to purchase the non-controlling interest owner’s 33% share in the entity for cash in accordance with a defined formula. This redeemable non-controlling interest is subject to remeasurement if the formulaic redemption amount exceeds the carrying value. No remeasurement was required as at June 30, 2015.

b) In May 2013, the Partnership entered into an agreement with Statoil, on behalf of the field license partners, to provide an FSO unit for the Gina Krog oil and gas field located in the North Sea. The contract will be serviced by a new FSO unit that will be converted from the Randgrid shuttle tanker, which the Partnership currently owns through a 67%-owned subsidiary and of which the Partnership intends to acquire full ownership prior to its conversion, which is expected to occur during the third quarter of 2015. The FSO conversion project is expected to cost approximately $273 million, including amounts reimbursable upon delivery of the unit relating to installation and mobilization. As at June 30, 2015, payments made towards this commitment totaled $84.6 million and the remaining payments required to be made are $76.4 million (remainder of 2015), $110.4 million (2016) and $1.4 million (2017). Following scheduled completion of the conversion in early-2017, the FSO unit will commence operations under a three-year time-charter contract to Statoil, which includes 12 additional one-year extension options.

c) In March 2014, the Partnership acquired 100% of the shares of ALP, a Netherlands-based provider of long-distance ocean towing and offshore installation services to the global offshore oil and gas industry. Concurrently with this transaction, the Partnership and ALP entered into an agreement with Niigata Shipbuilding & Repair of Japan for the construction of four state-of-the-art SX-157 Ulstein Design ultra-long distance towing and offshore installation vessel newbuildings. These vessels will be equipped with dynamic positioning capability and are scheduled for delivery in 2016. The Partnership has agreed to acquire these newbuildings for a total cost of approximately $258 million. As at June 30, 2015, payments made towards these commitments totaled $71.9 million and the remaining payments required to be made under these newbuilding contracts are $50.8 million (remainder of 2015) and $135.6 million (2016). The Partnership intends to finance the newbuilding installments primarily from long-term debt financing of $177 million secured for these vessels in July 2015, and to a lesser extent, through existing liquidity and proceeds from equity issuances.

In October 2014, the Partnership, through its wholly-owned subsidiary ALP, agreed to acquire six on-the-water, long-distance towing and offshore installation vessels for approximately $222 million. The vessels were built between 2006 and 2010 and are all equipped with dynamic positioning capabilities. The Partnership took delivery of five vessels during the six months ended June 30, 2015 for a total price of $183.5 million, of which $126.4 million was debt financed and $57.1 million was financed through existing liquidity. The seller is currently in dispute with the previous management company of these vessels. To avoid disruption to the charters of these vessels, the seller has agreed to place $42.1 million of the purchase price, as security, in escrow accounts to cover any potential liability that the seller may incur resulting from settling this dispute. This has no impact on the Partnership. As at June 30, 2015, the Partnership recorded a restricted cash balance and a corresponding liability of $42.1 million relating to these five vessels. As at June 30, 2015, payments made towards these commitments totaled $183.5 million and the amount of the remaining payments required to be made is $38.5 million (remainder of 2015) for the one additional vessel. In July 2015, the Partnership took delivery of the remaining vessel.

d) In August 2014, the Partnership acquired 100% of the outstanding shares of Logitel, a Norway-based company focused on high-end UMS. Concurrently with this transaction, the Partnership acquired three UMS newbuildings ordered from COSCO (Nantong) Shipyard (COSCO) in China that are expected to cost a total of approximately $550 million, including estimated site supervision costs and license fees to be paid to Sevan to allow for use of its cylindrical hull design in these UMS. As at June 30, 2015, payments made towards these commitments totaled $170.2 million and the remaining payments required to be made under these newbuilding contracts were $5.7 million (remainder of 2015), $188.1 million (2016), $173.8 million (2017) and $11.8 million (2018). During the second quarter of 2015, the Partnership exercised its options to defer the delivery of its second UMS newbuilding by up to one year, and the delivery and all related construction work of its third UMS by 120 days. The Partnership took delivery of one UMS, the Arendal Spirit, in February 2015 and, subsequent to the options exercised, the remaining two units are scheduled to deliver in the third quarter of 2016 and the second quarter of 2017. The Partnership financed the Arendal Spirit through long-term debt financing and its existing liquidity and it intends to finance the remaining two UMS newbuilding payments primarily from expected long-term debt financing prior to their scheduled deliveries, and to a lesser extent, through existing liquidity and proceeds from equity issuances.

e) In October 2014, the Partnership sold a 1995-built shuttle tanker, the Navion Norvegia, to a 50/50 joint venture with Odebrecht. The vessel is committed to a new FPSO conversion for the Libra field located in the Santos Basin offshore Brazil. The conversion project will be completed at Sembcorp Marine’s Jurong Shipyard in Singapore and the FPSO unit is scheduled to commence operations in early-2017 under a 12-year fixed-rate contract with a consortium led by Petroleo Brasileiro SA (Petrobras). The FPSO conversion is expected to cost approximately $1.0 billion. As at June 30, 2015, payments made by the joint venture towards these commitments totaled $129.7 million and the remaining payments required to be made by the joint venture are $356.2 million (remainder of 2015), $497.8 million (2016) and $25.5 million (2017). The Partnership intends to finance its share of the conversion through its existing liquidity, proceeds from equity issuances and through long-term debt financing within the joint venture. The joint venture secured a $248 million short-term loan in late-2014, which was refinanced in July 2015 with a long-term debt facility of $804 million for the FPSO unit.

f) In December 2014, the Partnership acquired the Petrojarl I FPSO unit from Teekay Corporation for $57 million (see note 6i) in an asset acquisition. The Petrojarl I is undergoing upgrades at the Damen Shipyard Group’s DSR Schiedam Shipyard in the Netherlands with an estimated cost of approximately $231 million, which includes the cost of acquiring the Petrojarl I. The FPSO is scheduled to commence operations in the third quarter of 2016 under a five-year fixed-rate charter contract with QGEP. As at June 30, 2015, payments made towards these commitments, excluding the acquisition of the Petrojarl I FPSO unit from Teekay Corporation, totaled $30.3 million and the remaining payments required to be made were $116.3 million (remainder of 2015) and $27.5 million (2016). The Partnership intends to finance the remaining upgrade payments through its existing liquidity, proceeds from equity issuances and long-term debt financing for the FPSO unit. The Partnership secured a $180 million long-term loan in June 2015 and made a partial draw down on the facility in July 2015 to finance the Petrojarl I upgrade payments.

g) In June 2015, the Partnership entered into 15-year contracts, plus extension options, with a group of oil companies to provide shuttle tanker services for oil production on the east coast of Canada. These contracts are initially being serviced by three third party-owned shuttle tankers currently operating on the east coast of Canada, which are chartered-in to the Partnership, of which one vessel is expected to be replaced by one of the Partnership’s existing shuttle tankers, the Navion Hispania, during the third quarter of 2015. The Partnership has entered into contracts to construct three Suezmax DP2 shuttle tanker newbuildings for a fully built-up cost of approximately $368 million, with an option to order one additional vessel. These vessels will replace the existing vessels servicing the east coast of Canada. The three newbuildings are expected to be delivered in the fourth quarter of 2017 through the first half of 2018. As at June 30, 2015, payments made towards these commitments totaled $33.2 million and the remaining payments required to be made under these newbuilding contracts are $3.2 million (remainder of 2015), $55.2 million (2016), $207.5 million (2017), and $68.6 million (2018). The Partnership intends to finance the newbuilding installments through its existing liquidity and expects to secure long-term debt financing for these vessels prior to their scheduled deliveries.

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Unit Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash settled restricted unit-based compensation awards			$ 120,438		$ 120,438		$ 68,013
Non-management directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units, granted					14,603
Common units aggregate value, granted					$ 300
Restricted Unit-based Compensation Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted	$ 2,100	$ 2,100
Common units, granted	101,543	67,569
Share-based Compensation Arrangement by Share-based Payment Award, Description					Each award represents the specified number of the Partnership's common units plus reinvested distributions from the grant date to the vesting date.
Vesting period from grant date					3 years
Common units, vested					48,488	20,988
Common units, value					$ 1,500	$ 600
Common units issued to grantees					12,612	6,584
Amount paid to grantees in cash					$ 500	$ 300
Unit based compensation expense			200	$ 500	1,300	$ 1,900
Cash settled restricted unit-based compensation awards			1,000		1,000		$ 1,000
Non-vested awards not yet recognized			$ 1,500		$ 1,500
Expected weighted average period of non-vested awards not yet recognized					1 year 3 months 18 days

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Acquisitions - Fair Values of Assets Acquired and Liabilities Assumed by Partnership (Detail) - USD ($) $ in Thousands			1 Months Ended
	Aug. 11, 2014	Mar. 14, 2014	Aug. 31, 2014	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Goodwill (towage segment)				$ 129,145	$ 129,145
LIABILITIES
Other long-term liabilities				$ 69,450	$ 75,805
ALP Maritime Services B.V. [Member]
ASSETS
Cash and cash equivalents		$ 294
Other current assets		404
Advances on newbuilding contracts		164
Other assets - long-term		395
Goodwill (towage segment)		2,032
Total assets acquired		3,289
LIABILITIES
Current liabilities		387
Other long-term liabilities		286
Total liabilities assumed		673
Net assets acquired		2,616
Cash consideration		$ 2,616
Logitel Offshore Holding [Member]
ASSETS
Cash and cash equivalents	$ 8,089
Prepaid expenses	640
Advances on newbuilding contracts	44,570
Intangible assets	1,000
Total assets acquired	54,299
LIABILITIES
Accrued liabilities	4,098
Long-term debt	27,600
Total liabilities assumed	31,698
Net assets acquired	22,601
Cash consideration	4,000		$ 4,000
Contingent consideration	18,601
Logitel Offshore Holding [Member] | Preliminary Valuation [Member]
ASSETS
Cash and cash equivalents	8,089
Prepaid expenses	640
Advances on newbuilding contracts	46,809
Total assets acquired	55,538
LIABILITIES
Accrued liabilities	4,098
Long-term debt	26,270
Total liabilities assumed	30,368
Net assets acquired	25,170
Cash consideration	4,000
Contingent consideration	21,170
Logitel Offshore Holding [Member] | Adjustments [Member]
ASSETS
Advances on newbuilding contracts	(2,239)
Intangible assets	1,000
Total assets acquired	(1,239)
LIABILITIES
Long-term debt	1,330
Total liabilities assumed	1,330
Net assets acquired	(2,569)
Contingent consideration	$ (2,569)

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Total Capital and Net Income Per Common Unit - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Limited Partners' Capital Account [Line Items]
Percentage of limited partner units outstanding held by public		74.20%		74.20%
General partner's interest				2.00%
Distributions payable and paid on the preferred units		$ 4,791	$ 2,719	$ 7,510	$ 5,438
Exceeded cash distributions per unit		$ 0.4025	$ 0.4025
Net proceeds from public offering				$ 120,813
Redemption of Preferred Units		$ 25.00		$ 25.00
Series B Preferred Stock [Member]
Limited Partners' Capital Account [Line Items]
Public offering made by Partnership	5.0
Preferred units dividend rate	8.50%
Net proceeds from public offering	$ 120,813

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Financial Instruments - Summary of Partnership's Financing Receivables (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Payment activity [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Direct financing leases	$ 20,100	$ 22,458

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Derivative Instruments and Hedging Activities - Additional Information (Detail) - Interest rate swaps and cross currency swaps [Member] $ in Millions	Jun. 30, 2015 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate fair value liability	$ 304.0
Restricted cash	$ 31.6

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Investment in Equity Accounted Joint Ventures and Advances to Joint Venture

6 Months Ended

Jun. 30, 2015

Equity Method Investments and Joint Ventures [Abstract]

Investment in Equity Accounted Joint Ventures and Advances to Joint Venture

14. Investment in Equity Accounted Joint Ventures and Advances to Joint Venture

In October 2014, the Partnership sold a 1995-built shuttle tanker, the Navion Norvegia, to the OOG-TK Libra GmbH & Co KG (or Libra Joint Venture), a 50/50 joint venture with Odebrecht. The vessel is committed to a new FPSO unit conversion for the Libra field. The FPSO unit is scheduled to commence operations in early-2017 (see note 9e). In conjunction with the conversion project, the Libra Joint Venture entered into a $248 million loan facility. The interest payments of the loan facility are based on LIBOR, plus margins which range between 2.00% to 2.65%. The final payment under the loan facility is due October 2015. The Partnership has guaranteed its 50% share of the loan facility.

In June 2013, the Partnership acquired Teekay Corporation’s 50% interest in OOG-TKP FPSO GmbH & Co KG, a joint venture with Odebrecht, which owns the Itajai FPSO unit (see note 6g). As at December 31, 2014, the Partnership advanced $5.2 million to the joint venture, which was repaid during the six months ended June 30, 2015.

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Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Long-Term Debt

	June 30, 2015		December 31, 2014
	$		$
U.S. Dollar-denominated Revolving Credit Facilities due through 2019		560,504		544,969
Norwegian Kroner Bonds due through 2019		369,277		389,157
U.S. Dollar-denominated Term Loans due through 2018		137,378		158,547
U.S. Dollar-denominated Term Loans due through 2025		1,076,820		850,433
U.S. Dollar Non-Public Bond due through 2024		217,983		192,917
U.S. Dollar Bonds due through 2019		300,000		300,000
Total		2,661,962		2,436,023
Less current portion		466,952		258,014
Long-term portion		2,195,010		2,178,009

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Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Detail) - Jun. 30, 2015 - Interest Rate Swaps [Member] - USD ($)	Total
Derivative [Line Items]
Notional Amount	$ 1,659,709,000
Fair Value / Carrying Amount of Assets (Liability)	$ (194,252,000)
Swap Agreement One [Member]
Derivative [Line Items]
Interest Rate Index	LIBOR
Notional Amount	$ 600,000,000
Fair Value / Carrying Amount of Assets (Liability)	$ (142,385,000)
Weighted-Average Remaining Term (years)	10 years 3 months 18 days
Fixed Interest Rate	4.80%
Swap Agreement Two [Member]
Derivative [Line Items]
Interest Rate Index	LIBOR
Notional Amount	$ 879,709,000
Fair Value / Carrying Amount of Assets (Liability)	$ (42,431,000)
Weighted-Average Remaining Term (years)	5 years 10 months 24 days
Fixed Interest Rate	2.50%
Swap Agreement Three [Member]
Derivative [Line Items]
Interest Rate Index	LIBOR
Notional Amount	$ 180,000,000
Fair Value / Carrying Amount of Assets (Liability)	$ (9,436,000)
Weighted-Average Remaining Term (years)	1 month 6 days
Fixed Interest Rate	3.40%

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Long-Term Debt - Additional Information - USD Term Loans (Detail)	6 Months Ended
	Jun. 30, 2015 USD ($) Subsidiary	Feb. 28, 2015 USD ($)	Dec. 31, 2014 USD ($)
Debt Instrument [Line Items]
Number of subsidiaries with outstanding term loans guaranteed | Subsidiary	3
Partnership's interest owned in subsidiaries	50.00%
Carrying amount of debt	$ 2,661,962,000		$ 2,436,023,000
U.S. Dollar-denominated Term Loans due through 2018 [Member]
Debt Instrument [Line Items]
Carrying amount of debt	$ 137,378,000		$ 158,547,000
Debt instrument collateral, description	These term loans are collateralized by first-priority mortgages on the three shuttle tankers to which the loans relate, together with other related security.
Frequency of paying U.S. Dollar-denominated Term Loans	Quarterly and semi-annual payments
U.S. Dollar-denominated Term Loans due through 2018 [Member] | Guarantee of Indebtedness of Others [Member] | Teekay Corporation [Member]
Debt Instrument [Line Items]
Guaranteed term loans	$ 34,800,000
U.S. Dollar-denominated Term Loans due through 2018 [Member] | Guarantee of Indebtedness of Others [Member] | JV Partner [Member]
Debt Instrument [Line Items]
Guaranteed term loans	$ 68,700,000
U.S. Dollar-denominated Term Loans due through 2018 [Member] | Guarantee of Indebtedness of Others [Member] | Partnership [Member]
Debt Instrument [Line Items]
Number of subsidiaries with outstanding term loans guaranteed | Subsidiary	2
Guaranteed term loans	$ 33,900,000
Percent share of the outstanding term loans	50.00%
U.S. Dollar-denominated Term Loans due through 2025 [Member]
Debt Instrument [Line Items]
Carrying amount of debt	$ 1,100,000,000
Debt instrument collateral, description	These term loans have varying maturities through 2025 and are collateralized by first-priority mortgages on the vessels to which the loans relate, together with other related security.
Frequency of paying U.S. Dollar-denominated Term Loans	Quarterly or semi-annual payments
U.S. Dollar-denominated Term Loans due through 2025 [Member] | Guarantee of Indebtedness of Others [Member] | Teekay Corporation [Member]
Debt Instrument [Line Items]
Guaranteed term loans	$ 308,400,000
U.S. Dollar-denominated Term Loans due through 2025 [Member] | Guarantee of Indebtedness of Others [Member] | Partnership [Member]
Debt Instrument [Line Items]
Guaranteed term loans	768,400,000
Term Loans Due 2022 [Member]
Debt Instrument [Line Items]
Final bullet payments	29,000,000
U.S. Dollar-denominated Term Loans due through 2023 [Member]
Debt Instrument [Line Items]
Final bullet payments	29,100,000
Senior bonds mature in June 2024 [Member]
Debt Instrument [Line Items]
Carrying amount of debt	$ 28,900,000
Debt instrument collateral, description	The bonds are collateralized by first-priority mortgage on the Dampier Spirit FSO unit to which the bonds relate, together with other related security.
Fixed interest rate of bonds	4.27%
Senior bonds issued face amount		$ 30,000,000

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Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
OPERATING ACTIVITIES
Net income	$ 94,636	$ 5,222
Non-cash items:
Unrealized (gain) loss on derivative instruments (note 7)	(855)	53,106
Equity income	(13,811)	(6,091)
Depreciation and amortization	107,468	96,962
Write-down and (gain) on sale of vessel (note 13)	14,353
Deferred income tax expense (recovery) (note 8)	571	(223)
Amortization of in-process revenue contracts	(6,320)	(6,320)
Foreign currency exchange (gain) loss and other	(39,269)	371
Change in non-cash working capital items related to operating activities	15,192	(96,617)
Expenditures for dry docking	(5,145)	(9,468)
Net operating cash flow	166,820	36,942
FINANCING ACTIVITIES
Proceeds from long-term debt (note 5)	410,374	720,443
Scheduled repayments of long-term debt (note 5)	(150,949)	(241,223)
Prepayments of long-term debt (note 5)	(13,606)	(302,413)
Debt issuance costs	(4,554)	(10,094)
Decrease in restricted cash (note 7)	15,140
Proceeds from issuance of common units		7,784
Proceeds from issuance of preferred units	125,000
Expenses relating to equity offerings	(4,187)	(153)
Cash distributions paid by the Partnership	(115,460)	(107,197)
Settlement of contingent consideration liability (note 3)	(3,303)
Cash distributions paid by subsidiaries to non-controlling interests	(5,720)	(5,718)
Equity contribution from joint venture partners	5,500	22,017
Indemnification on Voyageur Spirit FPSO from Teekay Corporation (note 6f)		3,474
Other	579	397
Net financing cash flow	258,814	87,317
INVESTING ACTIVITIES
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs	(404,033)	(92,084)
Increase in restricted cash (note 9c)	(42,080)
Proceeds from sale of vessel and equipment (note 13)	8,918
Repayment from joint ventures (note 14)	5,225
Direct financing lease payments received	2,358	2,582
Investment in equity accounted joint ventures (note 14)	(5,396)
Net investing cash flow	(435,008)	(91,824)
(Decrease) Increase in cash and cash equivalents	(9,374)	32,435
Cash and cash equivalents, beginning of the period	252,138	219,126
Cash and cash equivalents, end of the period	$ 242,764	251,561
ALP Maritime Services B.V. [Member]
INVESTING ACTIVITIES
Acquisition of subsidiary, Net of cash acquired		$ (2,322)

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Financial Instruments

6 Months Ended

Jun. 30, 2015

Investments, All Other Investments [Abstract]

Financial Instruments

3. Financial Instruments

a) Fair Value Measurements

For a description of how the Partnership estimates fair value and for a description of the fair value hierarchy levels, see Note 4 in the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2014. The following table includes the estimated fair value and carrying value of those assets and liabilities that are measured at fair value on a recurring and non-recurring basis, as well as the estimated fair value of the Partnership’s financial instruments that are not accounted for at fair value on a recurring basis.

		June 30, 2015						December 31, 2014
	Fair Value Hierarchy Level	Carrying Amount Asset (Liability) $			Fair Value Asset (Liability) $			Carrying Amount Asset (Liability) $			Fair Value Asset (Liability) $
Recurring:
Cash and cash equivalents and restricted cash	Level 1		316,464			316,464			298,898			298,898
Logitel contingent consideration (see below)	Level 3		(15,292	)		(15,292	)		(21,448	)		(21,448	)
Derivative instruments (note 7)
Interest rate swap agreements	Level 2		(194,252	)		(194,252	)		(216,488	)		(216,488	)
Cross currency swap agreements	Level 2		(140,557	)		(140,557	)		(120,503	)		(120,503	)
Foreign currency forward contracts	Level 2		(10,150	)		(10,150	)		(11,268	)		(11,268	)
Other:
Long-term debt - public (note 5)	Level 1		(669,277	)		(637,129	)		(689,157	)		(656,899	)
Long-term debt - non-public (note 5)	Level 2		(1,992,685	)		(1,974,978	)		(1,746,866	)		(1,743,378	)

Contingent consideration liability – In August 2014, the Partnership acquired 100% of the outstanding shares of Logitel Offshore Holding AS (Logitel), a Norway-based company focused on high-end Units for Maintenance and Safety (or UMS), from Cefront Technology AS (Cefront) for $4 million, which was paid in cash at closing, plus a potential additional amount of up to $27.6 million, depending on certain performance criteria, which is payable from mid-2015 to early-2018 (see note 12b).

The Partnership will owe an additional amount of up to $27.6 million if there are no yard cost overruns and no charterer late delivery penalties; the two unchartered UMS under construction are chartered above specified rates; and no material defects from construction are identified within one year after the delivery of each UMS. To the extent such events occur, the potential additional amount of $27.6 million will be reduced in accordance with the terms of the purchase agreement. The estimated fair value of the contingent consideration liability of $15.3 million at June 30, 2015 is the amount the Partnership expects to pay to Cefront discounted to its present value using a weighted average cost of capital rate of 11.5%. As of June 30, 2015, the amount of the expected payments for each UMS was based upon the status of the construction project for the remaining two UMS newbuildings, the state of the charter market for the remaining two UMS newbuildings, the expectation of potential material defects for each UMS, and, to a lesser extent, the timing of delivery of the remaining two UMS newbuildings. An increase (decrease) in the Partnership’s estimates of yard cost overruns, charterer late delivery penalties, material defects and the discount rate, as well as a decrease (increase) in the Partnership’s estimates of day rates at which it expects to charter the two unchartered UMS, will decrease (increase) the estimated fair value of the contingent consideration liability.

Changes in the estimated fair value of the Partnership’s contingent consideration liability relating to the acquisition of Logitel, which is measured at fair value on a recurring basis using significant unobservable inputs (Level 3), during the three and six months ended June 30, 2015 and 2014 are as follows:

	Three months ended					Six months ended
	June 30,					June 30,
	2015			2014		2015			2014
	Asset (Liability)					Asset (Liability)
	$			$		$			$
Balance at beginning of period		(21,562	)		—		(21,448	)		—
Settlement of liability		3,540			—		3,540			—
Adjustment to liability (note 12b)		2,569			—		2,569			—
Unrealized gain included in Other income - net		161			—		47			—
Balance at end of period		(15,292	)		—		(15,292	)		—

b) Financing Receivables

The following table contains a summary of the Partnership’s financing receivables by type of borrower and the method by which the Partnership monitors the credit quality of its financing receivables on a quarterly basis:

	Credit Quality Indicator		Grade		June 30, 2015		December 31, 2014
					$		$
Direct financing leases		Payment activity		Performing		20,100		22,458

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Commitments and Contingencies - Additional Information - ALP (Detail) $ in Thousands		1 Months Ended			6 Months Ended
	Mar. 14, 2014 USD ($) Vessel	Jul. 31, 2015 USD ($) Vessel	Oct. 31, 2014 USD ($) Vessel	Mar. 31, 2014 USD ($) Vessel	Jun. 30, 2015 USD ($) Vessel	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)
Loss Contingencies [Line Items]
Payments made towards commitments					$ 34,503	$ 30,211
Escrow liabilities					120,438	$ 68,013
ALP Maritime Services B.V. [Member]
Loss Contingencies [Line Items]
Percentage of shares acquired	100.00%			100.00%
Number of vessels | Vessel			6
Expected cost of newbuildings	$ 258,000			$ 258,000
Payments made towards commitments							$ 71,900
Payments due in the remainder of 2015					38,500		50,800
Payments due in the year 2016							$ 135,600
Business acquisition, purchase price			$ 222,000
Cash payment on acquisition of vessels					183,500
Escrow liabilities					42,100
Restricted cash					42,100
ALP Maritime Services B.V. [Member] | Debt Financing [Member]
Loss Contingencies [Line Items]
Cash payment on acquisition of vessels					126,400
ALP Maritime Services B.V. [Member] | Liquidity [Member]
Loss Contingencies [Line Items]
Cash payment on acquisition of vessels					$ 57,100
ALP Maritime Services B.V. [Member] | Delivered [Member]
Loss Contingencies [Line Items]
Number of vessels | Vessel					5
ALP Maritime Services B.V. [Member] | Newbuildings [Member]
Loss Contingencies [Line Items]
Number of vessels | Vessel	4			4
ALP Maritime Services B.V. [Member] | Subsequent Event [Member] | Delivered [Member]
Loss Contingencies [Line Items]
Number of vessels | Vessel		1
ALP Maritime Services B.V. [Member] | Subsequent Event [Member] | Newbuildings [Member]
Loss Contingencies [Line Items]
Secured long-term debt financing		$ 177,000

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(Write-down) and Gain on Sale of Vessels and Vessel Held for Sale - Additional Information (Detail) - Jun. 30, 2015 $ in Thousands	USD ($)	USD ($) Vessel
Property, Plant and Equipment [Line Items]
Write down and gain (loss) on sale of vessels	$ (500)	$ (14,353)
Proceeds from sale of vessels		8,918
Shuttle Tanker [Member]
Property, Plant and Equipment [Line Items]
Write down and gain (loss) on sale of vessels		$ (13,853)
1992-built shuttle tankers [Member]
Property, Plant and Equipment [Line Items]
Write down and gain (loss) on sale of vessels, description		During the six months ended June 30, 2015, the carrying value of one of the Partnership's 1992-built shuttle tankers was written down to its estimated fair value, using an appraised value. The write down was a result of the expected sale of the vessel.
Write down and gain (loss) on sale of vessels		$ (1,700)
1992-built shuttle tankers [Member] | Shuttle Tanker [Member] | Impaired Asset [Member] | Cost Approach Valuation Technique [Member]
Property, Plant and Equipment [Line Items]
Number of vessels | Vessel		1
1999-built shuttle tankers [Member]
Property, Plant and Equipment [Line Items]
Write down and gain (loss) on sale of vessels, description		During the six months ended June 30, 2015, the carrying value of one of the Partnership’s 1999-built shuttle tankers was written down to its estimated fair value, using an appraised value. The write down was a result of a recent change in the operating plan of the vessel.
Write down and gain (loss) on sale of vessels		$ (13,800)
1999-built shuttle tankers [Member] | Shuttle Tanker [Member] | Impaired Asset [Member] | Cost Approach Valuation Technique [Member]
Property, Plant and Equipment [Line Items]
Number of vessels | Vessel		1
1997-built shuttle tankers [Member]
Property, Plant and Equipment [Line Items]
Write down and gain (loss) on sale of vessels		$ 1,600
Proceeds from sale of vessels		$ 8,600

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Related Party Transactions and Balances (Tables)

6 Months Ended

Jun. 30, 2015

Related Party Transactions [Abstract]

Revenues (Expenses) from Related Party Transactions

 Such related party transactions were as follows for the periods indicated:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015 $			2014 $			2015 $			2014 $
Revenues (1)		17,490			16,427			34,819			33,757
Vessel operating expenses (2)		(10,412	)		(10,182	)		(19,850	)		(19,830	)
General and administrative (3)(4)		(8,235	)		(10,252	)		(16,062	)		(18,540	)
Interest expense (5)		(112	)		(112	)		(223	)		(223	)

(1) Includes revenue from time-charter-out or bareboat contracts with subsidiaries or affiliates of Teekay Corporation, including management fees from ship management services provided by the Partnership to a subsidiary of Teekay Corporation.

(2) Includes ship management and crew training services provided by Teekay Corporation.

(3) Includes commercial, technical, strategic, business development and administrative management fees charged by Teekay Corporation and reimbursements to Teekay Corporation and our general partner for costs incurred on the Partnership’s behalf.

(4) Includes a $1.6 million business development fee paid to Teekay Corporation in connection with the acquisition of ALP during the three and six months ended June 30, 2014.

(5) Includes a guarantee fee related to the final bullet payment of the Piranema Spirit FPSO debt facility guaranteed by Teekay Corporation and interest expense incurred on due to affiliates balances.

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Long-Term Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt	$ 2,661,962	$ 2,436,023
Less current portion	466,952	258,014
Long-term portion	2,195,010	2,178,009
Long-term debt	2,661,962	2,436,023
U.S. Dollar-denominated Revolving Credit Facilities due through 2019 [Member]
Debt Instrument [Line Items]
Long-term debt	560,504	544,969
Long-term debt	560,504	544,969
Norwegian Kroner Bonds due through 2019 [Member]
Debt Instrument [Line Items]
Long-term debt	369,277	389,157
Long-term debt	369,277	389,157
U.S. Dollar-denominated Term Loans due through 2018 [Member]
Debt Instrument [Line Items]
Long-term debt	137,378	158,547
Long-term debt	137,378	158,547
U.S. Dollar denominated Term Loans due through 2025 [Member]
Debt Instrument [Line Items]
Long-term debt	1,076,820	850,433
Long-term debt	1,076,820	850,433
U.S. Dollar Non-Public Bond due through 2024 [Member]
Debt Instrument [Line Items]
Long-term debt	217,983	192,917
Long-term debt	217,983	192,917
U.S. Dollar Bonds due through 2019 [Member]
Debt Instrument [Line Items]
Long-term debt	300,000	300,000
Long-term debt	$ 300,000	$ 300,000

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(Write-down) and Gain on Sale of Vessels and Vessel Held for Sale

6 Months Ended

Jun. 30, 2015

Discontinued Operations and Disposal Groups [Abstract]

(Write-down) and Gain on Sale of Vessels and Vessel Held for Sale

13. (Write-down) and Gain on Sale of Vessels and Vessel Held for Sale

During the six months ended June 30, 2015, the carrying value of one of the Partnership’s 1992-built shuttle tankers was written down to its estimated fair value, using an appraised value. The write down was a result of the expected sale of the vessel. The Partnership’s consolidated statement of income (loss) for the six months ended June 30, 2015, includes a $1.7 million write-down related to this vessel. The write-down is included in the Partnership’s shuttle tanker segment. As at June 30, 2015, the Partnership has classified this vessel as held for sale on its consolidated balance sheet.

During the six months ended June 30, 2015, the carrying value of one of the Partnership’s 1999-built shuttle tankers was written down to its estimated fair value, using an appraised value. The write down was a result of a recent change in the operating plan of the vessel. The Partnership’s consolidated statement of income (loss) for the six months ended June 30, 2015, includes a $13.8 million write-down related to this vessel. The write-down is included in the Partnership’s shuttle tanker segment.

During the six months ended June 30, 2015, the Partnership sold a 1997-built shuttle tanker, the Navion Svenita, for net proceeds of $8.6 million. The Partnership’s consolidated statement of income (loss) for the six months ended June 30, 2015 includes a $1.6 million gain related to the sale of this vessel. This gain is included in the Partnership’s shuttle tanker segment.