Seapeak (SEAL-PB) 6-K 13 Aug 21 2021 Q2 Current report (foreign) Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2021
Document And Entity Information [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Registrant Name	Teekay LNG Partners L.P.
Entity Central Index Key	0001308106
Current Fiscal Year End Date	--12-31

Unaudited Consolidated Statemen

Unaudited Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Voyage revenues (notes 6 and 10a)	$ 148,769	$ 148,205	$ 301,571	$ 288,092
Voyage expenses	(6,360)	(5,329)	(13,543)	(7,646)
Vessel operating expenses	(32,536)	(28,407)	(62,625)	(54,511)
Time-charter hire expenses	(5,867)	(5,368)	(11,717)	(11,290)
Depreciation and amortization	(32,349)	(31,629)	(64,251)	(64,268)
General and administrative expenses	(6,921)	(7,883)	(14,088)	(14,050)
Asset Impairment Charges	0	0	0	(45,000)
Income (loss) from vessel operations	64,736	69,589	135,347	91,327
Equity income (notes 7 and 10a)	28,940	32,155	66,456	32,528
Interest expense	(30,084)	(35,143)	(59,736)	(71,847)
Interest income (note 7)	1,302	1,697	3,308	4,067
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)	(2,870)	(8,516)	3,748	(28,987)
Foreign currency exchange (loss) gain (notes 8 and 11)	(2,843)	(11,624)	4,117	(6,885)
Other expense (note 3b)	(1,088)	(679)	(4,857)	(1,040)
Net income before income tax expense	58,093	47,479	148,383	19,163
Income tax (expense) recovery (note 9)	(1,815)	1,804	(1,038)	(708)
Net income	56,278	49,283	147,345	18,455
Non-controlling interest in net income			6,466	6,515
Preferred unitholders' interest in comprehensive income	6,425	6,425	12,850	12,850
General partner's interest in net income (loss)	823	713	2,249	(76)
Limited partners’ interest in net income (loss)	$ 46,040	$ 37,796	$ 125,780	$ (834)
Limited partners’ interest in net income (loss) per common unit (note 13):
Basic (usd per unit)	$ 0.53	$ 0.46	$ 1.45	$ (0.01)
Diluted (usd per unit)	$ 0.53	$ 0.46	$ 1.44	$ (0.01)
Weighted-average number of common units outstanding (note 13):
Basic (units)	86,970,999	82,197,665	86,963,374	79,629,623
Diluted (units)	87,133,146	82,262,235	87,112,516	79,629,623

Unaudited Consolidated Statem_2

Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income	$ 56,278	$ 49,283	$ 147,345	$ 18,455
Other comprehensive (loss) income before reclassifications
Unrealized loss on qualifying cash flow hedging instruments, net of tax	(16,948)	(11,081)	21,059	(68,634)
Other comprehensive (loss) income	(11,027)	(8,172)	32,777	(62,069)
Comprehensive income (loss)	45,251	41,111	180,122	(43,614)
Non-controlling interest in comprehensive income	2,860	4,033	7,679	3,447
Preferred unitholders' interest in comprehensive income	6,425	6,425	12,850	12,850
General and Limited partners' interest in comprehensive income (loss)	35,966	30,653	159,593	(59,911)
Equity income
Other comprehensive (loss) income before reclassifications
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	5,096	2,427	10,078	5,931
Interest expense
Other comprehensive (loss) income before reclassifications
Unrealized loss on qualifying cash flow hedging instruments, net of tax	(435)	(1,055)	4,040	(10,226)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	$ 825	$ 482	$ 1,640	$ 634

Unaudited Consolidated Balance

Unaudited Consolidated Balance Sheets - USD ($) shares in Thousands, $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current
Cash and cash equivalents	$ 144,206	$ 206,762
Restricted cash – current (note 15)	8,610	8,358
Accounts Receivable, after Allowance for Credit Loss, Current	12,230	7,631
Prepaid expenses	11,948	9,259
Current portion of derivative assets (note 11)	258	0
Direct Financing Lease, Net Investment in Lease, after Allowance for Credit Loss, Current	14,285	13,969
Due from Joint Ventures, Current	8,160	10,991
Advances to affiliates (note 10b)	6,940	4,924
Other current assets	3,071	237
Total current assets	209,708	262,131
Restricted cash – long-term (note 15)	37,384	42,823
Property, Plant and Equipment, Net, Excluding Capital Leased Assets	1,197,551	1,220,355
Property, Plant and Equipment, Other, Accumulated Depreciation	780,251	744,258
Accumulated Depreciation on Finance Leases	181,165	157,386
Vessels and equipment
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	1,644,654	1,654,814
Operating lease right-of-use asset (note 5b)	13,887	20,750
Total vessels and equipment	2,856,092	2,895,919
Investments in and advances to equity-accounted joint ventures, net (notes 3b and 7)	1,117,271	1,056,792
Other assets	26,386	22,382
Derivative assets (note 11)	6,925	4,505
Intangible assets, net	30,082	34,510
Goodwill	34,841	34,841
Total assets	4,805,965	4,854,004
Current
Accounts payable	3,721	4,883
Accrued liabilities (note 11)	64,113	81,706
Unearned revenue (note 6)	17,800	30,254
Current portion of long-term debt (note 8)	355,081	250,508
Current obligations related to finance leases (note 5a)	72,925	71,932
Current portion of operating lease liabilities (note 5b)	13,887	14,003
Current portion of derivative liabilities (note 11)	26,375	56,925
Advances from affiliates (note 10b)	8,086	11,047
Total current liabilities	561,988	521,258
Long-term debt (note 8)	1,062,298	1,221,705
Long-term obligations related to finance leases (note 5a)	1,232,130	1,268,990
Long-term operating lease liabilities (note 5b)	0	6,747
Derivative liabilities (note 11)	29,131	32,971
Other long-term liabilities (note 12b)	56,104	56,063
Total liabilities	2,941,651	3,107,734
Commitments and contingencies (notes 5, 7, 8, 11 and 12)
Limited Partners' Capital Account, Units Issued	87,000	87,000
Preferred Units, Authorized	11,900	11,900
Equity
Limited Partners' Capital Account	$ 1,545,448	$ 1,465,408
Preferred Units, Preferred Partners' Capital Accounts	285,159	285,159
General partner	47,613	46,182
Accumulated other comprehensive loss	(72,272)	(103,836)
Partners' equity	1,805,948	1,692,913
Non-controlling interest	58,366	53,357
Total equity	1,864,314	1,746,270
Total liabilities and total equity	4,805,965	4,854,004
Accounts receivable, non-trade	5,800	5,411
Net investments in direct financing leases, net (notes 3b and 6)	$ 487,276	$ 500,101
Limited Partners - preferred units issued (in shares)	11,800	11,800

Unaudited Consolidated Statem_3

Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Net income	$ 147,345	$ 18,455
Non-cash and non-operating items:
Unrealized (gain) loss on non-designated derivative instruments (note 11)	(30,158)	22,173
Depreciation and amortization	64,251	64,268
Write-down of vessels (note 14)	0	45,000
Unrealized foreign currency exchange (gain) loss including the effect of the settlement of cross currency swaps (note 11)	(8,199)	3,660
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	(37,867)	(17,676)
Amortization of deferred financing issuance costs included in interest expense	2,840	3,001
Provision for Loan, Lease, and Other Losses	4,417	160
Other Non-cash items	1,786	1,663
Receipts from direct financing and sales-type leases	7,285	267,463
Expenditures for dry docking	(8,412)	(1,927)
Other non-cash operating assets and liabilities	(57,704)	17,621
Net operating cash flow	85,584	423,861
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt	212,691	446,650
Scheduled repayments of long-term debt and settlement of related swaps (note 11)	(150,528)	(194,831)
Prepayments of long-term debt	(111,543)	(525,021)
Financing issuance costs	(2,461)	(2,601)
Scheduled repayments of obligations related to finance leases	(35,867)	(34,893)
Repurchase of common units (note 13)	0	(15,635)
Payments of Ordinary Dividends	60,426	47,295
Payments of Ordinary Dividends, Noncontrolling Interest	(2,670)	0
Payments to Noncontrolling Interests	0	2,219
Net financing cash flow	(150,804)	(375,845)
INVESTING ACTIVITIES
Expenditures for vessels and equipment	(12,853)	(8,832)
Repayment of Notes Receivable from Related Parties	10,330	0
Net investing cash flow	(2,523)	(8,832)
(Decrease) increase in cash, cash equivalents and restricted cash	(67,743)	39,184
Cash, cash equivalents and restricted cash, beginning of the period	190,200	292,475
Cash, cash equivalents and restricted cash, end of the period	190,200	292,475
Proceeds from Equity Method Investment, Distribution	$ 28,589	$ 14,852

Unaudited Consolidated Statem_4

Unaudited Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Statement of Cash Flows [Abstract]
Proceeds from Equity Method Investment, Distribution	$ 28,589	$ 14,852

Unaudited Consolidated Statem_5

Unaudited Consolidated Statement of Changes in Total Equity - USD ($) shares in Thousands, $ in Thousands	Total	General Partner	Common UnitsLimited Partners	Preferred UnitsLimited Partners	Accumulated Other Comprehensive Income (Loss)	Non- controlling Interest	Preferred units Series A ($0.5625 per unit)	Preferred units Series A ($0.5625 per unit)Preferred UnitsLimited Partners	Preferred units Series B ($0.5313 per unit)	Preferred units Series B ($0.5313 per unit)Preferred UnitsLimited Partners
Beginning balance, units at Dec. 31, 2019			77,510	11,800
Beginning balance at Dec. 31, 2019	$ 1,876,975	$ 50,241	$ 1,543,598	$ 285,159	$ (57,312)	$ 55,289
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	(30,828)	(789)	(38,630)	$ 6,425		2,166
Other Comprehensive Income (Loss), Net of Tax	(53,897)				(51,145)	(2,752)
Partners' Capital Account, Distributions	15,013	300	$ 14,713				$ 2,812	$ 2,812	$ 3,613	$ 3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units			35
Partners' Capital Account, Unit-based Payment Arrangement, Amount	212	4	$ 208
Other (note 10d)	462	12	$ 629			(179)
Repurchase of common units (note 13), units			(1,373)
Partners' Capital Account, Treasury Units, Purchased	15,635	313	$ 15,322
Ending balance, units at Mar. 31, 2020			76,172	11,800
Ending balance at Mar. 31, 2020	$ 1,702,551	47,839	$ 1,425,960	$ 285,159	(108,457)	52,050
Increase (Decrease) in Partners' Capital [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.19
Preferred Stock, Dividends Per Share, Declared							$ 0.5625		$ 0.5313
Beginning balance, units at Dec. 31, 2019			77,510	11,800
Beginning balance at Dec. 31, 2019	$ 1,876,975	50,241	$ 1,543,598	$ 285,159	(57,312)	55,289
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	18,455
Other Comprehensive Income (Loss), Net of Tax	(62,069)
Ending balance, units at Jun. 30, 2020			86,928	11,800
Ending balance at Jun. 30, 2020	1,718,487	45,868	$ 1,447,690	$ 285,159	(116,313)	56,083
Beginning balance, units at Mar. 31, 2020			76,172	11,800
Beginning balance at Mar. 31, 2020	1,702,551	47,839	$ 1,425,960	$ 285,159	(108,457)	52,050
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	49,283	713	37,796	$ 6,425		4,349
Other Comprehensive Income (Loss), Net of Tax	(8,172)				(7,856)	(316)
Partners' Capital Account, Distributions	19,432	389	$ 19,043				$ 2,812	2,812	$ 3,613	3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units			6
Partners' Capital Account, Unit-based Payment Arrangement, Amount	682	13	$ 669
Partners' Capital Account, Sale of Units	0	(2,308)	$ 2,308
Repurchase of common units (note 13), units			10,750
Ending balance, units at Jun. 30, 2020			86,928	11,800
Ending balance at Jun. 30, 2020	$ 1,718,487	45,868	$ 1,447,690	$ 285,159	(116,313)	56,083
Increase (Decrease) in Partners' Capital [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.25
Preferred Stock, Dividends Per Share, Declared							$ 0.5625		$ 0.5313
Beginning balance, units at Dec. 31, 2020			86,951	11,800
Beginning balance at Dec. 31, 2020	$ 1,746,270	46,182	$ 1,465,408	$ 285,159	(103,836)	53,357
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	91,067	1,426	79,740	$ 6,425		3,476
Other Comprehensive Income (Loss), Net of Tax	43,804				42,461	1,343
Partners' Capital Account, Distributions	22,127	389	$ 21,738				$ 2,812	2,812	$ 3,613	3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units			13
Partners' Capital Account, Unit-based Payment Arrangement, Amount	342	6	$ 336
Ending balance, units at Mar. 31, 2021			86,964	11,800
Ending balance at Mar. 31, 2021	$ 1,852,931	47,225	$ 1,523,746	$ 285,159	(61,375)	58,176
Increase (Decrease) in Partners' Capital [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.25
Preferred Stock, Dividends Per Share, Declared							$ 0.5625		$ 0.5313
Beginning balance, units at Dec. 31, 2020			86,951	11,800
Beginning balance at Dec. 31, 2020	$ 1,746,270	46,182	$ 1,465,408	$ 285,159	(103,836)	53,357
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	147,345
Other Comprehensive Income (Loss), Net of Tax	32,777
Ending balance, units at Jun. 30, 2021			86,984	11,800
Ending balance at Jun. 30, 2021	1,864,314	47,613	$ 1,545,448	$ 285,159	(72,272)	58,366
Increase (Decrease) in Partners' Capital [Roll Forward]
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders	(2,670)
Beginning balance, units at Mar. 31, 2021			86,964	11,800
Beginning balance at Mar. 31, 2021	1,852,931	47,225	$ 1,523,746	$ 285,159	(61,375)	58,176
Increase (Decrease) in Partners' Capital [Roll Forward]
Net (loss) income	56,278	823	46,040	$ 6,425		2,990
Other Comprehensive Income (Loss), Net of Tax	(11,027)				(10,897)	(130)
Partners' Capital Account, Distributions	25,449	447	$ 25,002				$ 2,812	$ 2,812	$ 3,613	$ 3,613
Partners' Capital Account, Unit-based Payment Arrangement, Number of Units			20
Partners' Capital Account, Unit-based Payment Arrangement, Amount	676	12	$ 664
Ending balance, units at Jun. 30, 2021			86,984	11,800
Ending balance at Jun. 30, 2021	$ 1,864,314	$ 47,613	$ 1,545,448	$ 285,159	$ (72,272)	$ 58,366
Increase (Decrease) in Partners' Capital [Roll Forward]
Common Stock, Dividends, Per Share, Declared	$ 0.2875
Preferred Stock, Dividends Per Share, Declared							$ 0.5625		$ 0.5313

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information The following is a tabular reconciliation of the Partnership's cash, cash equivalents and restricted cash balances for the periods presented in the Partnership's consolidated statements of cash flows. June 30, 2021 December 31, 2020 June 30, 2020 December 31, 2019 $ $ $ $ Cash and cash equivalents 144,206 206,762 226,328 160,221 Restricted cash – current 8,610 8,358 11,544 53,689 Restricted cash – long-term 37,384 42,823 54,603 39,381 190,200 257,943 292,475 253,291 The Partnership maintains restricted cash deposits relating to certain term loans, collateral for cross currency swaps (see Note 11), performance bond collateral and amounts received from charterers to be used only for dry-docking expenditures and emergency repairs.

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information Schedule	6 Months Ended
	Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash and Cash Equivalents	The following is a tabular reconciliation of the Partnership's cash, cash equivalents and restricted cash balances for the periods presented in the Partnership's consolidated statements of cash flows. June 30, 2021 December 31, 2020 June 30, 2020 December 31, 2019 $ $ $ $ Cash and cash equivalents 144,206 206,762 226,328 160,221 Restricted cash – current 8,610 8,358 11,544 53,689 Restricted cash – long-term 37,384 42,823 54,603 39,381 190,200 257,943 292,475 253,291 The Partnership maintains restricted cash deposits relating to certain term loans, collateral for cross currency swaps (see Note 11), performance bond collateral and amounts received from charterers to be used only for dry-docking expenditures and emergency repairs.

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 144,206	$ 206,762	$ 226,328	$ 160,221
Restricted cash – current	8,610	8,358	11,544	53,689
Restricted cash – long-term	37,384	42,823	54,603	39,381
Total	$ 190,200	$ 257,943	$ 292,475	$ 253,291

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	The unaudited interim consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP ). These unaudited consolidated financial statements include the accounts of Teekay LNG Partners L.P. (or the Partnership ), which is a limited partnership formed under the laws of the Republic of the Marshall Islands, its wholly-owned and controlled subsidiaries and any variable interest entities (or VIEs ) of which it is the primary beneficiary. Certain information and footnote disclosures required by GAAP for complete annual financial statements have been omitted and, therefore, these unaudited interim consolidated financial statements should be read in conjunction with the Partnership’s audited consolidated financial statements for the year ended December 31, 2020, which were included in the Partnership’s Annual Report on Form 20-F for the year ended December 31, 2020 filed with the U.S. Securities and Exchange Commission (or SEC ) on April 1, 2021. In the opinion of management of Teekay GP L.L.C., the general partner of the Partnership (or the General Partner ), these unaudited interim consolidated financial statements reflect all adjustments consisting solely 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. Significant intercompany balances and transactions have been eliminated upon consolidation. The preparation of 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. It is possible that the amounts recorded as derivative liabilities could vary by material amounts prior to their settlement. In March 2020, the World Health Organization declared the outbreak of a novel coronavirus (or COVID-19 ) as a pandemic. While the Partnership has experienced some logistical challenges across its fleet due to COVID-19, the Partnership has not yet experienced any material negative financial impacts to its results of operations or financial position for the periods covered by these consolidated financial statements as a result of COVID-19, other than the COVID-19 global pandemic being a contributing factor to the write-down of six of the Partnership's multi-gas vessels during the six months ended June 30, 2020 as described in Note 14. Given the dynamic nature of the COVID-19 global pandemic, the full extent to which the COVID-19 global pandemic may have material direct or indirect impact on the Partnership's business and the related financial reporting implications cannot be reasonably estimated at this time, although it could materially affect the business, results of operations and financial condition in the future.

Accounting Pronouncements

Accounting Pronouncements	6 Months Ended
	Jun. 30, 2021
Accounting Changes and Error Corrections [Abstract]
Accounting Pronouncements	Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12 - Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes (or ASU 2019-12 ), as part of its initiative to reduce complexity in the accounting standards. The amendments in ASU 2019-12 eliminate certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences, among other changes. The Partnership adopted this update on January 1, 2021. The adoption did not have an impact on the Partnership's consolidated financial statements and related disclosures. In March 2020, the FASB issued ASU 2020-04 - Reference Rate Reform ( Topic 848 ) Facilitation of the Effects of Reference Rate Reform on Financial Reporting . This ASU provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as the London Interbank Offered Rate (or "LIBOR" ). This ASU applies only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued. This ASU is effective through December 31, 2022. The Partnership is currently evaluating the effect of adopting this new guidance.
New Accounting Pronouncements, Policy [Policy Text Block]	Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12 - Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes (or ASU 2019-12 ), as part of its initiative to reduce complexity in the accounting standards. The amendments in ASU 2019-12 eliminate certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences, among other changes. The Partnership adopted this update on January 1, 2021. The adoption did not have an impact on the Partnership's consolidated financial statements and related disclosures. In March 2020, the FASB issued ASU 2020-04 - Reference Rate Reform ( Topic 848 ) Facilitation of the Effects of Reference Rate Reform on Financial Reporting . This ASU provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as the London Interbank Offered Rate (or "LIBOR" ). This ASU applies only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued. This ASU is effective through December 31, 2022. The Partnership is currently evaluating the effect of adopting this new guidance.

Financial Instruments

Financial Instruments	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Financial Instruments	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 Item 18 – Financial Statements: Note 3 to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. 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, 2021 December 31, 2020 Fair Carrying Fair Carrying Fair Recurring: Cash and cash equivalents and restricted cash (note 15) Level 1 190,200 190,200 257,943 257,943 Derivative instruments (note 11) Interest rate swap agreements – assets Level 2 1,363 1,363 — — Interest rate swap agreements – liabilities Level 2 (40,048) (40,048) (75,468) (75,468) Cross currency swap agreements – assets Level 2 5,820 5,820 4,505 4,505 Cross currency swap agreements – liabilities Level 2 (18,524) (18,524) (20,022) (20,022) Non-recurring: Vessels and equipment Level 2 — — 40,717 40,717 Other: Loans to equity-accounted joint ventures (note 7) (i) 106,301 (i) 116,632 (i) Long-term debt – public (note 8) Level 1 (351,786) (360,319) (352,260) (359,581) Long-term debt – non-public (note 8) Level 2 (1,065,593) (1,084,437) (1,119,953) (1,137,050) Obligations related to finance leases (note 5a) Level 2 (1,305,055) (1,386,363) (1,340,922) (1,456,927) (i) The advances to equity-accounted joint ventures together with the Partnership’s equity investments in the joint ventures form the net aggregate carrying value of the Partnership’s interests in the joint ventures in these unaudited consolidated financial statements. The fair values of the individual components of such aggregate interests are not determinable. b) Credit Losses For a description of the Partnership's exposure to potential credit losses under ASC 326, see Item 18 – Financial Statements: Note 3b to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. The following table includes the amortized cost basis of the Partnership’s direct interests in financing receivables and net investment in direct financing leases by class of financing receivables and by period of origination and their associated credit quality as at June 30, 2021 and December 31, 2020. Amortized Cost Basis by Origination Year Credit Quality Grade (1) 2020 2018 2016 and prior Total As at June 30, 2021 $ $ $ $ Direct financing leases Tangguh Hiri and Tangguh Sago Performing — — 326,166 326,166 Bahrain Spirit Performing — 210,795 — 210,795 — 210,795 326,166 536,961 Loans to equity-accounted joint ventures Exmar LPG Joint Venture Performing — — 32,266 32,266 Bahrain LNG Joint Venture Performing — — 73,375 73,375 Other Performing 660 — — 660 660 — 105,641 106,301 660 210,795 431,807 643,262 As at December 31, 2020 Direct financing leases Tangguh Hiri and Tangguh Sago Performing — — 332,308 332,308 Bahrain Spirit Performing — 211,939 — 211,939 — 211,939 332,308 544,247 Loans to equity-accounted joint ventures Exmar LPG Joint Venture Performing — — 42,266 42,266 Bahrain LNG Joint Venture Performing — — 73,375 73,375 Other Performing 991 — — 991 991 — 115,641 116,632 991 211,939 447,949 660,879 (1) For a description of how the Partnership's credit quality grades are determined see Item 18 – Financial Statements: Note 3b to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. As at June 30, 2021 and December 31, 2020, all direct financing and sales-type leases held by the Partnership and the Partnership’s equity-accounted joint ventures had a credit quality grade of performing. Changes in the Partnership's allowance for credit losses for the three and six months ended June 30, 2021 and 2020 are as follows: Direct Financing Leases (1) (2) $ Direct Financing and Sales-Type Leases and Other within Equity-Accounted Joint Ventures (1) (2) $ Loans to Equity-Accounted Joint Ventures (1) $ Guarantees of Debt (1) $ Total Three and Six Months Ended June 30, 2021 As at December 31, 2020 30,177 54,937 4,726 2,080 91,920 Provision for (reversal of) potential credit losses 4,436 6,677 (981) 218 10,350 As at March 31, 2021 34,613 61,614 3,745 2,298 102,270 Provision for (reversal of) potential credit losses 787 722 255 (298) 1,466 As at June 30, 2021 35,400 62,336 4,000 2,000 103,736 Three and Six Months Ended June 30, 2020 As at January 1, 2020 11,155 36,292 3,714 2,139 53,300 (Reversal of) provision for potential credit losses (100) 8,980 — — 8,880 As at March 31, 2020 11,055 45,272 3,714 2,139 62,180 Provision for (reversal of) potential credit losses 465 (423) 83 (288) (163) As at June 30, 2020 11,520 44,849 3,797 1,851 62,017 (1) For a description of how the credit loss provision for direct financing leases, direct financing and sales-type leases and other within equity-accounted joint ventures, loans to equity-accounted joint ventures and guarantees of debt was determined for the three and six months ended June 30, 2021 and 2020, see Item 18 – Financial Statements: Note 3b to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. (2) The change in credit loss provision of $0.8 million and $5.2 million for the Partnership's consolidated vessels for the three and six months ended June 30, 2021, respectively ($0.5 million and $0.4 million for the three and six months ended June 30, 2020, respectively), was included in other expense in the Partnership's consolidated statements of income. The change in the credit loss provision for the six months ended June 30, 2021 primarily reflects a decline in the estimated charter-free valuations for certain types of its liquefied natural gas (or LNG ) carriers at the end of their time-charter contract which are accounted for as direct financing leases. These estimated future charter-free values are subject to change based on the underlying LNG shipping market fundamentals. The change in credit loss provision of $0.7 million and $7.4 million for the three and six months ended June 30, 2021, respectively ($(0.4) million and $8.6 million for the three and six months ended June 30, 2020, respectively), relating to the direct financing and sales-type leases and other within the Partnership's equity-accounted joint ventures was included in equity income in the Partnership's consolidated statements of income. The change in credit loss provision for the six months ended June 30, 2021 primarily reflects a decline in the estimated charter-free valuations for certain types of LNG carriers at the end of their time-charter contract, which are accounted for as direct financing and sales-type leases.
Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring	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 Item 18 – Financial Statements: Note 3 to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. 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, 2021 December 31, 2020 Fair Carrying Fair Carrying Fair Recurring: Cash and cash equivalents and restricted cash (note 15) Level 1 190,200 190,200 257,943 257,943 Derivative instruments (note 11) Interest rate swap agreements – assets Level 2 1,363 1,363 — — Interest rate swap agreements – liabilities Level 2 (40,048) (40,048) (75,468) (75,468) Cross currency swap agreements – assets Level 2 5,820 5,820 4,505 4,505 Cross currency swap agreements – liabilities Level 2 (18,524) (18,524) (20,022) (20,022) Non-recurring: Vessels and equipment Level 2 — — 40,717 40,717 Other: Loans to equity-accounted joint ventures (note 7) (i) 106,301 (i) 116,632 (i) Long-term debt – public (note 8) Level 1 (351,786) (360,319) (352,260) (359,581) Long-term debt – non-public (note 8) Level 2 (1,065,593) (1,084,437) (1,119,953) (1,137,050) Obligations related to finance leases (note 5a) Level 2 (1,305,055) (1,386,363) (1,340,922) (1,456,927) (i) The advances to equity-accounted joint ventures together with the Partnership’s equity investments in the joint ventures form the net aggregate carrying value of the Partnership’s interests in the joint ventures in these unaudited consolidated financial statements. The fair values of the individual components of such aggregate interests are not determinable.
Credit Loss, Financial Instrument	b) Credit Losses For a description of the Partnership's exposure to potential credit losses under ASC 326, see Item 18 – Financial Statements: Note 3b to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. The following table includes the amortized cost basis of the Partnership’s direct interests in financing receivables and net investment in direct financing leases by class of financing receivables and by period of origination and their associated credit quality as at June 30, 2021 and December 31, 2020. Amortized Cost Basis by Origination Year Credit Quality Grade (1) 2020 2018 2016 and prior Total As at June 30, 2021 $ $ $ $ Direct financing leases Tangguh Hiri and Tangguh Sago Performing — — 326,166 326,166 Bahrain Spirit Performing — 210,795 — 210,795 — 210,795 326,166 536,961 Loans to equity-accounted joint ventures Exmar LPG Joint Venture Performing — — 32,266 32,266 Bahrain LNG Joint Venture Performing — — 73,375 73,375 Other Performing 660 — — 660 660 — 105,641 106,301 660 210,795 431,807 643,262 As at December 31, 2020 Direct financing leases Tangguh Hiri and Tangguh Sago Performing — — 332,308 332,308 Bahrain Spirit Performing — 211,939 — 211,939 — 211,939 332,308 544,247 Loans to equity-accounted joint ventures Exmar LPG Joint Venture Performing — — 42,266 42,266 Bahrain LNG Joint Venture Performing — — 73,375 73,375 Other Performing 991 — — 991 991 — 115,641 116,632 991 211,939 447,949 660,879 (1) For a description of how the Partnership's credit quality grades are determined see Item 18 – Financial Statements: Note 3b to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. As at June 30, 2021 and December 31, 2020, all direct financing and sales-type leases held by the Partnership and the Partnership’s equity-accounted joint ventures had a credit quality grade of performing. Changes in the Partnership's allowance for credit losses for the three and six months ended June 30, 2021 and 2020 are as follows: Direct Financing Leases (1) (2) $ Direct Financing and Sales-Type Leases and Other within Equity-Accounted Joint Ventures (1) (2) $ Loans to Equity-Accounted Joint Ventures (1) $ Guarantees of Debt (1) $ Total Three and Six Months Ended June 30, 2021 As at December 31, 2020 30,177 54,937 4,726 2,080 91,920 Provision for (reversal of) potential credit losses 4,436 6,677 (981) 218 10,350 As at March 31, 2021 34,613 61,614 3,745 2,298 102,270 Provision for (reversal of) potential credit losses 787 722 255 (298) 1,466 As at June 30, 2021 35,400 62,336 4,000 2,000 103,736 Three and Six Months Ended June 30, 2020 As at January 1, 2020 11,155 36,292 3,714 2,139 53,300 (Reversal of) provision for potential credit losses (100) 8,980 — — 8,880 As at March 31, 2020 11,055 45,272 3,714 2,139 62,180 Provision for (reversal of) potential credit losses 465 (423) 83 (288) (163) As at June 30, 2020 11,520 44,849 3,797 1,851 62,017 (1) For a description of how the credit loss provision for direct financing leases, direct financing and sales-type leases and other within equity-accounted joint ventures, loans to equity-accounted joint ventures and guarantees of debt was determined for the three and six months ended June 30, 2021 and 2020, see Item 18 – Financial Statements: Note 3b to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. (2) The change in credit loss provision of $0.8 million and $5.2 million for the Partnership's consolidated vessels for the three and six months ended June 30, 2021, respectively ($0.5 million and $0.4 million for the three and six months ended June 30, 2020, respectively), was included in other expense in the Partnership's consolidated statements of income. The change in the credit loss provision for the six months ended June 30, 2021 primarily reflects a decline in the estimated charter-free valuations for certain types of its liquefied natural gas (or LNG ) carriers at the end of their time-charter contract which are accounted for as direct financing leases. These estimated future charter-free values are subject to change based on the underlying LNG shipping market fundamentals. The change in credit loss provision of $0.7 million and $7.4 million for the three and six months ended June 30, 2021, respectively ($(0.4) million and $8.6 million for the three and six months ended June 30, 2020, respectively), relating to the direct financing and sales-type leases and other within the Partnership's equity-accounted joint ventures was included in equity income in the Partnership's consolidated statements of income. The change in credit loss provision for the six months ended June 30, 2021 primarily reflects a decline in the estimated charter-free valuations for certain types of LNG carriers at the end of their time-charter contract, which are accounted for as direct financing and sales-type leases.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The following tables include results for the Partnership’s segments for the periods presented in these unaudited consolidated financial statements. Three Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Voyage revenues 136,764 12,005 148,769 137,822 10,383 148,205 Voyage expenses (841) (5,519) (6,360) (806) (4,523) (5,329) Vessel operating expenses (27,260) (5,276) (32,536) (24,599) (3,808) (28,407) Time-charter hire expenses (5,867) — (5,867) (5,368) — (5,368) Depreciation and amortization (30,660) (1,689) (32,349) (30,566) (1,063) (31,629) General and administrative expenses (i) (6,268) (653) (6,921) (7,251) (632) (7,883) Income (loss) from vessel operations 65,868 (1,132) 64,736 69,232 357 69,589 Equity income 26,000 2,940 28,940 27,795 4,360 32,155 Six Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Voyage revenues 278,180 23,391 301,571 270,392 17,700 288,092 Voyage expenses (2,970) (10,573) (13,543) (1,835) (5,811) (7,646) Vessel operating expenses (52,843) (9,782) (62,625) (46,691) (7,820) (54,511) Time-charter hire expenses (11,717) — (11,717) (11,290) — (11,290) Depreciation and amortization (60,892) (3,359) (64,251) (61,158) (3,110) (64,268) General and administrative expenses (i) (12,871) (1,217) (14,088) (13,004) (1,046) (14,050) Write-down of vessels — — — — (45,000) (45,000) Income (loss) from vessel operations 136,887 (1,540) 135,347 136,414 (45,087) 91,327 Equity income 58,939 7,517 66,456 27,977 4,551 32,528 (i) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources). A reconciliation of total segment assets to consolidated total assets presented in the Partnership's consolidated balance sheets is as follows: June 30, 2021 December 31, $ $ Total assets of the LNG segment 4,411,512 4,395,336 Total assets of the LPG segment 243,307 246,982 Unallocated: Cash and cash equivalents 144,206 206,762 Advances to affiliates 6,940 4,924 Consolidated total assets 4,805,965 4,854,004

Chartered-in Vessels

Chartered-in Vessels	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Lessee, Operating Leases [Text Block]	b) Operating Leases The Partnership has chartered a vessel from its 52%-owned joint venture with Marubeni Corporation (or the MALT Joint Venture ) on a time-charter-in contract, whereby the MALT Joint Venture provides use of the vessel to the Partnership and operates the vessel for the Partnership (see Note 10a). As at June 30, 2021, minimum commitments to be incurred by the Partnership relating to its time-charter-in contract with the MALT Joint Venture were approximately $12.0 million (remainder of 2021) and $11.1 million (2022). These amounts do not include commitments relating to two vessels owned by Teekay BLT Corporation (or the Tangguh Joint Venture ) which are described in Note 12b.
Lessee, Finance Leases [Text Block]	Obligations related to Finance Leases June 30, 2021 December 31, $ $ Total obligations related to finance leases 1,305,055 1,340,922 Less current portion (72,925) (71,932) Long-term obligations related to finance leases 1,232,130 1,268,990 As at June 30, 2021 and December 31, 2020, the Partnership was a party to finance leases on nine LNG carriers. These nine LNG carriers were sold by the Partnership to third parties (or Lessors ) and leased back under 7.5 to 15-year bareboat charter contracts ending in 2026 through 2034. At inception of these leases, the weighted-average interest rate implicit in these leases was 5.1%. The bareboat charter contracts are presented as obligations related to finance leases on the Partnership's consolidated balance sheets and have purchase obligations at the end of the lease terms. The obligations of the Partnership under the bareboat charter contracts for the nine LNG carriers are guaranteed by the Partnership. The guarantee agreements require the Partnership to maintain minimum levels of tangible net worth and aggregate liquidity, and not to exceed a maximum amount of leverage. As at June 30, 2021, the Partnership was in compliance with all covenants in respect of the obligations related to its finance leases. As at June 30, 2021, the remaining commitments related to the financial liabilities of these nine LNG carriers, including the amounts to be paid for the related purchase obligations, approximated $1.7 billion, including imputed interest of $366.8 million, repayable for the remainder of 2021 through 2034, as indicated below: Commitments as at Year $ Remainder of 2021 69,063 2022 136,959 2023 135,459 2024 132,011 2025 129,725 Thereafter 1,068,641

Revenues

Revenues	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue The Partnership’s primary source of revenue is from chartering its vessels to its customers. The Partnership primarily utilizes two forms of contracts consisting of time-charter contracts and voyage charter contracts. For a description of these contracts, see Item 18 – Financial Statements: Note 6 in the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. Revenue Table The following tables contain the Partnership’s revenue for the three and six months ended June 30, 2021 and 2020, by contract type and by segment. Three Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Time charters 133,908 1,687 135,595 135,761 — 135,761 Voyage charters — 10,318 10,318 — 10,383 10,383 Management fees and other income 2,856 — 2,856 2,061 — 2,061 136,764 12,005 148,769 137,822 10,383 148,205 Six Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Time charters 273,426 3,806 277,232 266,306 — 266,306 Voyage charters — 19,585 19,585 — 17,700 17,700 Management fees and other income 4,754 — 4,754 4,086 — 4,086 278,180 23,391 301,571 270,392 17,700 288,092 The following table contains the Partnership’s revenue for the three and six months ended June 30, 2021 and 2020, by contracts or components of contracts accounted for as leases and those not accounted for as leases: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 $ $ $ $ Lease revenue Lease revenue from lease payments of operating leases 126,459 127,289 258,303 246,888 Interest income on lease receivables 12,294 12,595 24,529 25,261 Variable lease payments - cost reimbursements (1) 1,700 1,263 3,145 2,320 140,453 141,147 285,977 274,469 Non-lease revenue Non-lease revenue - related to direct financing leases 5,460 4,997 10,840 9,537 Management fees and other income 2,856 2,061 4,754 4,086 8,316 7,058 15,594 13,623 Total 148,769 148,205 301,571 288,092 (1) Reimbursements for vessel operating expenditures and dry-docking expenditures received from the Partnership's customers relating to such costs incurred by the Partnership to operate the vessel for the customer pursuant to charter contracts accounted for as operating leases. Net Investments in Direct Financing Leases As at June 30, 2021 and December 31, 2020, the Partnership had three LNG carriers, excluding the vessels in its equity-accounted joint ventures, that are accounted for as direct financing leases. For a description of the Partnership's LNG carriers accounted for as direct financing leases, see Item 18 – Financial Statements: Note 6 to the Partnership's audited consolidated financial statements included in its Annual Report on Form 20-F for the year ended December 31, 2020. In January 2020, Awilco purchased two LNG carriers classified as sales-type leases, the WilForce and the WilPride , from the Partnership and paid the Partnership the associated purchase obligation amounts, deferred hire amounts and interest on deferred hire amounts, totaling $260.4 million relating to these two vessels. As at June 30, 2021, estimated lease payments to be received by the Partnership related to its direct financing leases in each of the next five years were approximately $32.3 million (remainder of 2021), $64.2 million (2022), $64.0 million (2023), $64.3 million (2024), $64.2 million (2025) and an aggregate of $446.5 million thereafter. Two leases are expected to end in 2028 and the remaining lease is scheduled to end in 2039. Operating Leases As at June 30, 2021, the minimum scheduled future rentals to be received by the Partnership in each of the next five years for the lease and non-lease elements related to charters that were accounted for as operating leases are approximately $229.1 million (remainder of 2021), $373.0 million (2022), $309.9 million (2023), $252.9 million (2024), and $197.4 million (2025). Minimum scheduled future rentals on operating lease contracts do not include rentals from vessels in the Partnership’s equity-accounted joint ventures, rentals from unexercised option periods of contracts that existed on June 30, 2021, variable or contingent rentals, or rentals from contracts which were entered into or commenced after June 30, 2021. Therefore, the minimum scheduled future rentals on operating leases should not be construed to reflect total charter hire revenues for any of these five years. Contract Liabilities As at June 30, 2021, the Partnership had $14.0 million of advanced payments recognized as contract liabilities included in unearned revenue (December 31, 2020 – $26.5 million, June 30, 2020 – $26.4 million and December 31, 2019 – $24.9 million). The Partnership recognized $19.9 million and $22.0 million of revenue for the three months ended June 30, 2021 and 2020, respectively, that was recognized as a contract liability at the beginning of such three-month periods. The Partnership recognized $26.5 million and $24.9 million of revenue for the six months ended June 30, 2021 and 2020, respectively, that was recognized as a contract liability at the beginning of such six-month periods.

Equity-Accounted Joint Ventures

Equity-Accounted Joint Ventures	6 Months Ended
	Jun. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Equity-Accounted Investments	Equity-Accounted Joint Ventures For a description of the Partnership's equity-accounted joint ventures, see Item 18 - Financial Statements: Note 7a in the Partnership's audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. The Partnership's potential credit losses associated with its equity-accounted joint ventures are described in Note 3b and are excluded from the amounts in this note. a) As of June 30, 2021, the Partnership had advanced $32.3 million to the Exmar LPG Joint Venture (December 31, 2020 – $42.3 million), in which the Partnership has a 50% ownership interest. These advances bear interest at LIBOR plus 0.50% and have no fixed repayment terms. For the three and six months ended June 30, 2021, interest earned on these loans amounted to $0.1 million and $0.2 million, respectively (three and six months ended June 30, 2020 – $0.3 million and $0.6 million, respectively), and is included in interest income in the Partnership's consolidated statements of income. As of June 30, 2021 and December 31, 2020, the interest receivable on these advances was $nil. These advances were included in current portion of advances to equity-accounted joint ventures, net and in investments in and advances to equity-accounted joint ventures, net in the Partnership’s consolidated balance sheets. b) As of June 30, 2021 and December 31, 2020, the Partnership had advanced $73.4 million to the Bahrain LNG Joint Venture, in which the Partnership has a 30% ownership interest. These advances bear interest at 6.0%. For the three and six months ended June 30, 2021, interest earned on these advances amounted to $1.2 million and $2.4 million, respectively (three and six months ended June 30, 2020 – $1.1 million and $2.2 million, respectively), and is included in interest income in the Partnership's consolidated statements of income. As of June 30, 2021 and December 31, 2020, the interest receivable on these advances was $7.5 million and $5.1 million, respectively. Both the advances and the accrued interest on these advances were included in investments in and advances to equity-accounted joint ventures, net in the Partnership’s consolidated balance sheets. c) As of June 30, 2021, the Partnership had advanced $0.7 million to the Angola Joint Venture (December 31, 2020 – $1.0 million), in which the Partnership has a 33% ownership interest. These advances bear interest at LIBOR plus 1.0%. The advances were included in current portion of advances to equity-accounted joint ventures, net in the Partnership’s consolidated balance sheets. d) The Partnership guarantees its proportionate share of certain loan facilities and obligations on interest rate swaps for certain of its equity-accounted joint ventures for which the aggregate principal amount of the loan facilities and fair value of the interest rate swaps as at June 30, 2021 was $1.3 billion. As at June 30, 2021, with the exception of debt service coverage ratio breaches for three of the vessels in the Angola Joint Venture, all of the Partnership's equity-accounted joint ventures were in compliance with all covenants relating to these loan facilities that the Partnership guarantees. The Angola Joint Venture expects to obtain a waiver for the covenant requirements that were not met at June 30, 2021 until the next compliance test at December 31, 2021, similar to the waiver obtained in March 2021.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt June 30, 2021 December 31, 2020 $ $ U.S. Dollar-denominated Revolving Credit Facilities due in 2022 105,000 100,000 U.S. Dollar-denominated Term Loans and Bonds due from 2021 to 2030 833,295 873,712 Norwegian Krone-denominated Bonds due from 2021 to 2025 354,486 355,514 Euro-denominated Term Loans due in 2023 and 2024 134,447 152,710 Total principal 1,427,228 1,481,936 Unamortized discount and debt issuance costs (9,849) (9,723) Total debt 1,417,379 1,472,213 Less current portion (355,081) (250,508) Long-term debt 1,062,298 1,221,705 As at June 30, 2021, the Partnership had two revolving credit facilities available, which, as at such date, provided for borrowings of up to $342.7 million (December 31, 2020 – $354.8 million), of which $237.7 million (December 31, 2020 – $254.8 million) was undrawn. Interest payments are based on LIBOR plus a margin, where margins ranged from 1.40% to 2.25%. The amount available under the two revolving credit facilities will be reduced by $12.3 million in 2021 and $330.4 million in 2022, when both revolving credit facilities mature. The revolving credit facilities may be used by the Partnership for general partnership purposes. One of the revolving credit facilities is unsecured, while the other revolving credit facility is collateralized by first-priority mortgages granted on two of the Partnership’s vessels, together with other related security, and includes a guarantee from two of the Partnership's subsidiaries of all outstanding amounts. As at June 30, 2021, the Partnership had six U.S. Dollar-denominated term loans and bonds outstanding which totaled $833.3 million in aggregate principal amount (December 31, 2020 – $873.7 million). Interest payments on the term loans are based on LIBOR plus a margin, where margins ranged from 1.85% to 3.25% and fixed interest payments on the bonds ranging from 4.11% to 4.41%. The six combined term loans and bonds require quarterly interest and principal payments and five have balloon or bullet repayments due at maturity. The term loans and bonds are collateralized by first-priority mortgages on the 15 Partnership vessels to which the loans relate, together with certain other related security. In addition, as at June 30, 2021, all of the outstanding term loans were guaranteed by either the Partnership or the ship-owning entities within the RasGas II Joint Venture, in which the Partnership has a 70% ownership interest. As at June 30, 2021, and December 31, 2020, the Partnership had Norwegian Krone (or NOK ) 3.1 billion of senior unsecured bonds in the Norwegian bond market that mature through 2025. As at June 30, 2021, the total amount of the bonds, which are listed on the Oslo Stock Exchange, was $354.5 million (December 31, 2020 – $355.5 million). The interest payments on the bonds are based on Norwegian Interbank Offered Rate (or NIBOR ) plus a margin, where margins ranged from 4.60% to 6.00%. The Partnership entered into cross currency rate swaps, to swap all interest and principal payments of the bonds into U.S. Dollars, with the interest payments fixed at rates ranging from 5.74% to 7.89% and the transfer of principal fixed at $360.5 million upon maturity in exchange for NOK 3.1 billion (see Note 11). The Partnership had two Euro-denominated term loans outstanding, which as at June 30, 2021, totaled 113.4 million Euros ($134.4 million) (December 31, 2020 – 125.0 million Euros ($152.7 million)). Interest payments for one of the term loans are based on the Euro Interbank Offered Rate (or EURIBOR ) plus a margin. Interest payments on the remaining term loan are based on EURIBOR where EURIBOR is limited to zero or above zero values, plus a margin. Margins on the term loans ranged from 0.60% to 1.95%. The term loans require monthly and semi-annual interest and principal payments. The term loans have varying maturities through 2024. The term loans are collateralized by first-priority mortgages on two of the Partnership vessels to which the loans relate, together with certain other related security and are guaranteed by the Partnership and one of its subsidiaries. The weighted-average interest rates for the Partnership’s long-term debt outstanding as at June 30, 2021 and December 31, 2020 were 3.22% and 3.04%, respectively. These rates do not reflect the effect of related interest rate swaps that the Partnership has used to economically hedge certain of its floating-rate debt (see Note 11). All Euro-denominated term loans and NOK-denominated bonds are revalued at the end of each period using the then-prevailing U.S. Dollar exchange rate. Due primarily to the revaluation of the Partnership’s NOK-denominated bonds, the Partnership’s Euro-denominated term loans and restricted cash, and the change in the valuation of the Partnership’s cross currency swaps, the Partnership incurred foreign exchange (losses) gains of $(2.8) million and $(11.6) million for the three months ended June 30, 2021 and 2020, respectively, and $4.1 million and $(6.9) million for the six months ended June 30, 2021 and 2020, respectively. The aggregate annual long-term debt principal repayments required under the Partnership's revolving credit facilities, loans and bonds subsequent to June 30, 2021 are $195.6 million (remainder of 2021), $213.0 million (2022), $236.4 million (2023), $125.1 million (2024), $187.4 million (2025) and $469.7 million (thereafter). Certain loan agreements require that (a) the Partnership maintains minimum levels of tangible net worth and aggregate liquidity, (b) the Partnership maintain certain ratios of vessel values related to the relevant outstanding loan principal balance, (c) the Partnership not exceed a maximum amount of leverage, and (d) certain of the Partnership’s subsidiaries maintain restricted cash deposits. As at June 30, 2021, the Partnership had five credit facilities with an aggregate outstanding loan balance of $525.4 million that require it to maintain minimum vessel-value-to-outstanding-loan-principal-balance ratios of 110%, 115%, 120%, 120% and 135%, which as at June 30, 2021, were 137%, 400%, 145%, 148% and 195%, respectively. The vessel values used in calculating these ratios are the appraised values provided by third parties, where available, or prepared by the Partnership based on second-hand sale and purchase market data. Since vessel values can be volatile, the Partnership’s estimates of market value may not be indicative of either the current or future prices that could be obtained if the Partnership sold any of the vessels. The Partnership’s ship-owning subsidiaries may not, among other things, pay dividends or distributions if the Partnership's subsidiaries are in default under their term loans and, in addition, one of the term loans in the RasGas II Joint Venture requires it to satisfy a minimum vessel value to outstanding loan principal balance ratio to pay dividends. As at June 30, 2021, the Partnership was in compliance with all covenants relating to the Partnership’s credit facilities and other long-term debt.

Income Tax

Income Tax	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Income Tax	Income Tax (Expense) Recovery The components of the provision for income tax (expense) recovery are as follows: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 $ $ $ $ Current (1,264) 1,131 (2,650) (1,381) Deferred (551) 673 1,612 673 Income tax (expense) recovery (1,815) 1,804 (1,038) (708) Included in the Partnership's current income tax (expense) recovery are provisions for uncertain tax positions relating to freight taxes. The Partnership does not presently anticipate that its provisions for these uncertain tax positions will significantly increase in the next 12 months; however, this is dependent on the jurisdictions in which vessel trading activity occurs. The Partnership reviews its freight tax obligations on a regular basis and may update its assessment of its tax positions based on available information at that time. Such information may include additional legal advice as to the applicability of freight taxes in relevant jurisdictions. Freight tax regulations are subject to change and interpretation; therefore, the amounts recorded by the Partnership may change accordingly.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions a) The following table and related footnotes provide information about certain of the Partnership's related party transactions for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 $ $ $ $ Voyage revenues (i) 10,300 9,200 19,416 18,177 Vessel operating expenses (ii) (2,886) (1,337) (5,158) (2,733) Time-charter hire expenses (iii) (5,867) (5,368) (11,717) (11,290) General and administrative expenses (iv) (4,145) (3,787) (8,992) (7,585) Equity income (v) 602 603 1,198 1,206 (i) In September 2018, the Partnership’s FSU, the Bahrain Spirit , commenced its 21-year charter contract with the Bahrain LNG Joint Venture. Voyage revenues from the charter of the Bahrain Spirit to the Bahrain LNG Joint Venture for the three and six months ended June 30, 2021 amounted to $7.4 million and $14.6 million, respectively ($7.2 million and $14.1 million for the three and six months ended June 30, 2020, respectively). In addition, the Partnership has an operation and maintenance contract with the Bahrain LNG Joint Venture relating to the LNG regasification terminal in Bahrain. Fees received in relation to the operation and maintenance contract from the Bahrain LNG Joint Venture for the three and six months ended June 30, 2021 were $2.9 million and $4.8 million, respectively ($2.0 million and $4.1 million for the three and six months ended June 30, 2020, respectively), and are included in voyage revenues in the Partnership's consolidated statements of income. (ii) The Partnership and certain of its operating subsidiaries have entered into service agreements with certain subsidiaries of Teekay Corporation pursuant to which the Teekay Corporation subsidiaries provide to the Partnership and its subsidiaries crew training and technical management services. All costs incurred by these Teekay Corporation subsidiaries related to these services are charged to the Partnership and recorded as part of vessel operating expenses. (iii) Commencing in September 2018, the Partnership entered into an agreement with the MALT Joint Venture to charter in one of the MALT Joint Venture's LNG carriers, the Magellan Spirit (see Note 5b). The time-charter hire expenses charged for the three and six months ended June 30, 2021 were $5.9 million and $11.7 million, respectively ($5.4 million and $11.3 million for the three and six months ended June 30, 2020, respectively). (iv) Includes administrative, advisory, business development, commercial and strategic consulting services charged by Teekay Corporation and reimbursements to Teekay Corporation and the Partnership's General Partner for costs incurred on the Partnership's behalf for the conduct of the Partnership's business. (v) During the three and six months ended June 30, 2021, the Partnership charged fees of $0.6 million and $1.2 million, respectively ($0.6 million and $1.2 million for the three and six months ended June 30, 2020, respectively) to the Yamal LNG Joint Venture relating to the successful bid process for the construction and chartering of six ARC7 LNG carriers. The fees are reflected in equity income in the Partnership’s consolidated statements of income. b) As at June 30, 2021 and December 31, 2020, non-interest-bearing advances to affiliates totaled $6.9 million and $4.9 million, respectively, and non-interest-bearing advances from affiliates totaled $8.1 million and $11.0 million, respectively. These advances are unsecured and have no fixed repayment terms. Affiliates are entities that are under common control with the Partnership. c) On May 11, 2020, Teekay Corporation and the Partnership eliminated all of the Partnership's incentive distribution rights, which were held by the General Partner, in exchange for 10.75 million newly-issued common units of the Partnership. This was treated as a non-cash transaction in the Partnership's consolidated statements of cash flows. d) In December 2019, as part of dissolving certain of the Partnership's controlled subsidiaries as a result of a simplification transaction, the Partnership acquired the General Partner's 1% non-controlling interest in certain of the Partnership's subsidiaries for an amount initially estimated at $2.7 million. In April 2020, the purchase price was finalized at $2.2 million. e) For other transactions with the Partnership's equity-accounted joint ventures not disclosed above, please refer to Note 7.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities The Partnership uses derivative instruments in accordance with its overall risk management policy. Foreign Exchange Risk From time to time, the Partnership economically hedges portions of its forecasted expenditures denominated in foreign currencies with foreign currency forward contracts. As at June 30, 2021, the Partnership was not committed to any foreign currency forward contracts. The Partnership entered into cross currency swaps concurrently with the issuance of its NOK-denominated senior unsecured bonds (see Note 8), and pursuant to these swaps, the Partnership receives the principal amount in NOK on maturity dates of the swaps in exchange for payments 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 of the Partnership’s NOK-denominated bonds due in 2021, 2023 and 2025, and to economically hedge the interest rate exposure. The following table reflects information relating to the cross currency swaps as at June 30, 2021. Floating Rate Receivable Principal Principal Reference Rate Margin Fixed Rate Fair Value / Weighted- 1,200,000 146,500 NIBOR 6.00% 7.72% (8,667) 0.3 850,000 102,000 NIBOR 4.60% 7.89% (9,843) 2.2 1,000,000 112,000 NIBOR 5.15% 5.74% 5,806 4.2 (12,704) 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 certain of its outstanding floating-rate debt. As at June 30, 2021, the Partnership was committed to the following interest rate swap agreements: Interest Principal Fair Weighted- Fixed Interest Rate (i) LIBOR-Based Debt: U.S. Dollar-denominated interest rate swaps (ii) LIBOR 186,745 434 4.7 0.7% U.S. Dollar-denominated interest rate swaps (iii) LIBOR 5,356 (69) 0.1 2.8% U.S. Dollar-denominated interest rate swaps (ii)(iv) LIBOR 141,386 (2,682) 3.2 1.4% U.S. Dollar-denominated interest rate swaps (ii) LIBOR 288,510 (22,915) 2.6 3.6% U.S. Dollar-denominated interest rate swaps (ii) LIBOR 153,945 (8,814) 5.5 2.3% EURIBOR-Based Debt: Euro-denominated interest rate swaps (v) EURIBOR 62,945 (4,639) 2.2 3.9% (38,685) (i) Excludes the margins the Partnership pays on its floating-rate term loans, which, at June 30, 2021, ranged from 0.60% to 3.25%. (ii) Principal amount reduces quarterly. (iii) Principal amount reduces semi-annually. (iv) These interest rate swaps are subject to mandatory early termination in 2024 whereby the swaps will be settled based on their fair value at that time. (v) Principal amount reduces monthly. As at June 30, 2021, the Partnership had multiple interest rate swaps and cross currency swaps with the same counterparty that are subject to 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 derivative instruments is presented on a gross basis in the Partnership’s consolidated balance sheets. As at June 30, 2021, these interest rate swaps and cross currency swaps had an aggregate fair value asset of $6.2 million (December 31, 2020 – $4.5 million) and an aggregate fair value liability of $57.6 million (December 31, 2020 – $73.7 million). As at June 30, 2021, the Partnership had $nil (December 31, 2020 – $3.8 million) on deposit as security for swap liabilities under certain master agreements. The deposit is presented in restricted cash – current and restricted cash – long-term on the Partnership's consolidated balance sheets. Credit Risk The Partnership is exposed to credit loss in the event of non-performance by the counterparties to 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 practical, interest rate swaps are entered into with different counterparties to reduce concentration risk. The following table presents the classification and fair value amounts of derivative instruments, segregated by type of contract, on the Partnership’s consolidated balance sheets. Current portion of derivative Derivative Accrued Current portion of derivative Derivative As at June 30, 2021 Derivatives designated as a cash flow hedge: Interest rate swap agreements — — (63) (3,077) (5,673) Derivatives not designated as a cash flow hedge: Interest rate swap agreements — 1,363 (2,247) (12,442) (16,546) Cross currency swap agreements 258 5,562 (756) (10,856) (6,912) 258 6,925 (3,066) (26,375) (29,131) As at December 31, 2020 Derivatives designated as a cash flow hedge: Interest rate swap agreements — — (70) (3,162) (9,631) Derivatives not designated as a cash flow hedge: Interest rate swap agreements — — (4,823) (42,329) (15,453) Cross currency swap agreements — 4,505 (701) (11,434) (7,887) — 4,505 (5,594) (56,925) (32,971) Realized and unrealized (losses) gains relating to non-designated interest rate swap agreements and foreign currency forward contracts are recognized in earnings and reported in realized and unrealized (loss) gain on non-designated derivative instruments in the Partnership’s consolidated statements of income. The effect of the (loss) gain on these derivatives on the Partnership’s consolidated statements of income is as follows: Three Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Interest rate swap agreements (3,925) 1,055 (2,870) (3,662) (4,854) (8,516) Six Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Interest rate swap agreements (8,398) 30,158 21,760 (6,573) (22,375) (28,948) Interest rate swap agreement (18,012) — (18,012) — — — Foreign currency forward contracts — — — (241) 202 (39) (26,410) 30,158 3,748 (6,814) (22,173) (28,987) Realized and unrealized (losses) gains relating to cross currency swap agreements are recognized in earnings and reported in foreign currency exchange (loss) gain in the Partnership’s consolidated statements of income. The effect of the (loss) gain on these derivatives on the Partnership's consolidated statements of income is as follows: Three Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Cross currency swap agreements (1,293) (2,262) (3,555) (1,430) 45,881 44,451 Cross currency swap agreements — — — (33,844) — (33,844) (1,293) (2,262) (3,555) (35,274) 45,881 10,607 Six Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Cross currency swap agreements (2,638) 2,867 229 (3,247) (3,659) (6,906) Cross currency swap agreements — — — (33,844) — (33,844) (2,638) 2,867 229 (37,091) (3,659) (40,750) For the periods indicated, the following table presents the gains or losses on interest rate swap agreements designated and qualifying as cash flow hedges and their impact on other comprehensive (loss) income (or OCI ). The following table excludes any interest rate swap agreements designated and qualifying as cash flow hedges in the Partnership’s equity-accounted joint ventures. Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Amount of Loss Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense Amount of Loss Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense (435) (825) (1,055) (482) Six Months Ended June 30, 2021 Six Months Ended June 30, 2020 Amount of Gain Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense Amount of Loss Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense 4,040 (1,640) (10,226) (634)

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies a) The Partnership’s share of commitments to fund equipment installation and other construction contract costs as at June 30, 2021 is as follows: Total Remainder of 2022 Certain consolidated LNG carriers (i) 27,866 13,012 14,854 Bahrain LNG Joint Venture (ii) 11,339 11,339 — 39,205 24,351 14,854 (i) In June 2019, the Partnership entered into an agreement with a contractor to supply reliquefaction equipment on certain of the Partnership's LNG carriers in 2021 and 2022, for an estimated installed cost of $54.8 million. As at June 30, 2021, the estimated remaining cost of these installations was $27.9 million. (ii) The Partnership has a 30% ownership interest in the Bahrain LNG Joint Venture which has an LNG receiving and regasification terminal in Bahrain. As at June 30, 2021, the Partnership's proportionate share of the estimated remaining cost of $11.3 million relates to the final construction installment on the LNG terminal. The Bahrain LNG Joint Venture has remaining undrawn debt financing of $24 million, of which $7 million relates to the Partnership's proportionate share of the construction commitments included in the table above. b) The Partnership owns 70% of the Tangguh Joint Venture, which is a party to operating leases whereby the Tangguh Joint Venture is leasing the Tangguh Hiri and Tangguh Sago LNG carriers (or the Tangguh LNG Carriers ) to a third party, which is in turn leasing the vessels back to the joint venture. The amounts referenced in Note 5b do not include the Partnership’s minimum charter hire payments to be paid and received under these leases, which are described in more detail in Item 18 – Financial Statements: Note 14d to the Partnership’s audited consolidated financial statements filed with its Annual Report on Form 20-F for the year ended December 31, 2020. Under the terms of the leasing arrangement for the Tangguh LNG Carriers, whereby the Tangguh Joint Venture is the lessee, the lessor claims tax depreciation on its lease of these vessels. As is typical in these types of leasing arrangements, tax and change of law risks are assumed by the lessee. Lease payments under the lease arrangements are based on certain tax and financial assumptions at the commencement of the leases. If an assumption proves to be incorrect, the lessor is entitled to increase the lease payments to maintain its agreed after-tax margin. As at June 30, 2021, the carrying amount of this estimated tax indemnification obligation relating to the leasing arrangement through the Tangguh Joint Venture was $5.4 million (December 31, 2020 – $5.7 million) and was included as part of other long-term liabilities in the consolidated balance sheets of the Partnership. c) Management is required to assess whether the Partnership will have sufficient liquidity to continue as a going concern for the one-year period following the issuance of its consolidated financial statements. The Partnership had a working capital deficit of $352.3 million as at June 30, 2021. This working capital deficit includes $355.1 million related to scheduled maturities and repayments of long-term debt in the 12 months following June 30, 2021. Based on the Partnership’s liquidity at the date these unaudited consolidated financial statements were issued, the liquidity it expects to generate from operations over the following year, the cash distributions it expects to receive from its equity-accounted joint ventures, and an expected debt refinancing which the Partnership considers probable based on its history of refinancing similar debt, the Partnership estimates that it will have sufficient liquidity to continue as a going concern for at least the one-year period following the issuance of these unaudited consolidated financial statements.

Total Capital and Net Income Pe

Total Capital and Net Income Per Unit	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Total Capital and Net (Loss) Income Per Unit	and Net Income (Loss) Per Common Unit As at June 30, 2021, approximately 58.7% of the Partnership’s common units outstanding were held by the public. The remaining common units, as well as the 1.8% general partner interest, were held by subsidiaries of Teekay Corporation. All of the Partnership's outstanding Series A Cumulative Redeemable Perpetual Preferred Units (or the Series A Preferred Units ) and Series B Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units (or the Series B Preferred Units ) are held by the public. On May 11, 2020, Teekay Corporation and the Partnership agreed to eliminate all of the Partnership's incentive distribution rights, which were held by the General Partner, in exchange for the issuance to a Teekay Corporation subsidiary of 10.75 million newly-issued common units of the Partnership. The common units were valued at $122.6 million, based on the prevailing unit price at the time of issuance. This transaction has decreased the General Partner’s equity by $2.3 million representing its 1.8% proportionate share of the cost to eliminate the incentive distribution rights. This transaction has increased the limited partners’ equity by $2.3 million, representing the excess value of the common units issued over its 98.2% share of the cost to eliminate the incentive distribution rights. Subsequent to the elimination of the Partnership’s incentive distribution rights, the amount of net income attributable to the limited partners and General Partner is based on the limited partners' and General Partner’s respective ownership percentages. Net Income (Loss) Per Common Unit Limited partners' interest in net income (loss) per common unit is determined by dividing net income (loss), 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 and Series B Preferred Units, by the weighted-average number of common units outstanding during the period. The distributions payable on the Series A and Series B Preferred Units for the three and six months ended June 30, 2021 and 2020 were $6.4 million and $12.9 million, respectively. Three Months Ended June 30, 2021 2020 $ $ Limited partners' interest in net income for basic net income per common unit 46,040 37,796 Weighted average number of common units 86,970,999 82,197,665 Dilutive effect of unit-based compensation 162,147 64,570 Weighted average number of common units and common unit equivalents 87,133,146 82,262,235 Limited partner's interest in net income per common unit: Basic 0.53 0.46 Diluted 0.53 0.46 Six Months Ended June 30, 2021 2020 $ $ Limited partners' interest in net income (loss) for basic net income (loss) per common unit 125,780 (834) Weighted average number of common units 86,963,374 79,629,623 Dilutive effect of unit-based compensation 149,142 — Weighted average number of common units and common unit equivalents 87,112,516 79,629,623 Limited partner's interest in net income (loss) per common unit: Basic 1.45 (0.01) Diluted 1.44 (0.01) Common Unit Repurchases

Write-down of Vessels

Write-down of Vessels	6 Months Ended
	Jun. 30, 2021
Property, Plant and Equipment [Abstract]
Write-down and Sale of Vessels	Write-down of Vessels In March 2020, the carrying values for six of the Partnership's seven wholly-owned multi-gas carriers (the Unikum Spirit , Vision Spirit , Pan Spirit, Cathinka Spirit , Camilla Spirit and Sonoma Spirit ), were written down to their estimated fair values at that time, using appraised values, primarily due to the lower near-term outlook for these types of vessels partly as a result of the economic environment at that time (including the economic impact of the COVID-19 global pandemic), as well as the Partnership receiving notification that the Partnership's then-existing commercial management agreement with a third-party commercial manager would be terminated and replaced by a new commercial management agreement in September 2020. The total impairment charge of $45.0 million was included in write-down of vessels for the six months ended June 30, 2020 in the Partnership's consolidated statements of income.

Accounting Pronouncements (Poli

Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2021
Accounting Changes and Error Corrections [Abstract]
New accounting pronouncements	Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12 - Income Taxes (Topic 740) Simplifying the Accounting for Income Taxes (or ASU 2019-12 ), as part of its initiative to reduce complexity in the accounting standards. The amendments in ASU 2019-12 eliminate certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences, among other changes. The Partnership adopted this update on January 1, 2021. The adoption did not have an impact on the Partnership's consolidated financial statements and related disclosures. In March 2020, the FASB issued ASU 2020-04 - Reference Rate Reform ( Topic 848 ) Facilitation of the Effects of Reference Rate Reform on Financial Reporting . This ASU provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as the London Interbank Offered Rate (or "LIBOR" ). This ASU applies only to contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued. This ASU is effective through December 31, 2022. The Partnership is currently evaluating the effect of adopting this new guidance.

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2021
Fair Value Disclosures [Abstract]
Summary of Partnership's Financing receivables and Direct financing leases	The following table includes the amortized cost basis of the Partnership’s direct interests in financing receivables and net investment in direct financing leases by class of financing receivables and by period of origination and their associated credit quality as at June 30, 2021 and December 31, 2020. Amortized Cost Basis by Origination Year Credit Quality Grade (1) 2020 2018 2016 and prior Total As at June 30, 2021 $ $ $ $ Direct financing leases Tangguh Hiri and Tangguh Sago Performing — — 326,166 326,166 Bahrain Spirit Performing — 210,795 — 210,795 — 210,795 326,166 536,961 Loans to equity-accounted joint ventures Exmar LPG Joint Venture Performing — — 32,266 32,266 Bahrain LNG Joint Venture Performing — — 73,375 73,375 Other Performing 660 — — 660 660 — 105,641 106,301 660 210,795 431,807 643,262 As at December 31, 2020 Direct financing leases Tangguh Hiri and Tangguh Sago Performing — — 332,308 332,308 Bahrain Spirit Performing — 211,939 — 211,939 — 211,939 332,308 544,247 Loans to equity-accounted joint ventures Exmar LPG Joint Venture Performing — — 42,266 42,266 Bahrain LNG Joint Venture Performing — — 73,375 73,375 Other Performing 991 — — 991 991 — 115,641 116,632 991 211,939 447,949 660,879
Financing Receivable, Allowance for Credit Loss	Changes in the Partnership's allowance for credit losses for the three and six months ended June 30, 2021 and 2020 are as follows: Direct Financing Leases (1) (2) $ Direct Financing and Sales-Type Leases and Other within Equity-Accounted Joint Ventures (1) (2) $ Loans to Equity-Accounted Joint Ventures (1) $ Guarantees of Debt (1) $ Total Three and Six Months Ended June 30, 2021 As at December 31, 2020 30,177 54,937 4,726 2,080 91,920 Provision for (reversal of) potential credit losses 4,436 6,677 (981) 218 10,350 As at March 31, 2021 34,613 61,614 3,745 2,298 102,270 Provision for (reversal of) potential credit losses 787 722 255 (298) 1,466 As at June 30, 2021 35,400 62,336 4,000 2,000 103,736 Three and Six Months Ended June 30, 2020 As at January 1, 2020 11,155 36,292 3,714 2,139 53,300 (Reversal of) provision for potential credit losses (100) 8,980 — — 8,880 As at March 31, 2020 11,055 45,272 3,714 2,139 62,180 Provision for (reversal of) potential credit losses 465 (423) 83 (288) (163) As at June 30, 2020 11,520 44,849 3,797 1,851 62,017
Fair Value Measurements, Recurring and Nonrecurring	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, 2021 December 31, 2020 Fair Carrying Fair Carrying Fair Recurring: Cash and cash equivalents and restricted cash (note 15) Level 1 190,200 190,200 257,943 257,943 Derivative instruments (note 11) Interest rate swap agreements – assets Level 2 1,363 1,363 — — Interest rate swap agreements – liabilities Level 2 (40,048) (40,048) (75,468) (75,468) Cross currency swap agreements – assets Level 2 5,820 5,820 4,505 4,505 Cross currency swap agreements – liabilities Level 2 (18,524) (18,524) (20,022) (20,022) Non-recurring: Vessels and equipment Level 2 — — 40,717 40,717 Other: Loans to equity-accounted joint ventures (note 7) (i) 106,301 (i) 116,632 (i) Long-term debt – public (note 8) Level 1 (351,786) (360,319) (352,260) (359,581) Long-term debt – non-public (note 8) Level 2 (1,065,593) (1,084,437) (1,119,953) (1,137,050) Obligations related to finance leases (note 5a) Level 2 (1,305,055) (1,386,363) (1,340,922) (1,456,927) (i) The advances to equity-accounted joint ventures together with the Partnership’s equity investments in the joint ventures form the net aggregate carrying value of the Partnership’s interests in the joint ventures in these unaudited consolidated financial statements. The fair values of the individual components of such aggregate interests are not determinable.

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2021
Segment Reporting [Abstract]
Segment Reporting Information	The following tables include results for the Partnership’s segments for the periods presented in these unaudited consolidated financial statements. Three Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Voyage revenues 136,764 12,005 148,769 137,822 10,383 148,205 Voyage expenses (841) (5,519) (6,360) (806) (4,523) (5,329) Vessel operating expenses (27,260) (5,276) (32,536) (24,599) (3,808) (28,407) Time-charter hire expenses (5,867) — (5,867) (5,368) — (5,368) Depreciation and amortization (30,660) (1,689) (32,349) (30,566) (1,063) (31,629) General and administrative expenses (i) (6,268) (653) (6,921) (7,251) (632) (7,883) Income (loss) from vessel operations 65,868 (1,132) 64,736 69,232 357 69,589 Equity income 26,000 2,940 28,940 27,795 4,360 32,155 Six Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Voyage revenues 278,180 23,391 301,571 270,392 17,700 288,092 Voyage expenses (2,970) (10,573) (13,543) (1,835) (5,811) (7,646) Vessel operating expenses (52,843) (9,782) (62,625) (46,691) (7,820) (54,511) Time-charter hire expenses (11,717) — (11,717) (11,290) — (11,290) Depreciation and amortization (60,892) (3,359) (64,251) (61,158) (3,110) (64,268) General and administrative expenses (i) (12,871) (1,217) (14,088) (13,004) (1,046) (14,050) Write-down of vessels — — — — (45,000) (45,000) Income (loss) from vessel operations 136,887 (1,540) 135,347 136,414 (45,087) 91,327 Equity income 58,939 7,517 66,456 27,977 4,551 32,528 (i) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources).
Reconciliation of Total Segment Assets	June 30, 2021 December 31, $ $ Total assets of the LNG segment 4,411,512 4,395,336 Total assets of the LPG segment 243,307 246,982 Unallocated: Cash and cash equivalents 144,206 206,762 Advances to affiliates 6,940 4,924 Consolidated total assets 4,805,965 4,854,004

Chartered-in Vessels (Tables)

Chartered-in Vessels (Tables)	6 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Obligations related to Finance Leases	Obligations related to Finance Leases June 30, 2021 December 31, $ $ Total obligations related to finance leases 1,305,055 1,340,922 Less current portion (72,925) (71,932) Long-term obligations related to finance leases 1,232,130 1,268,990
Commitments related to Finance Leases	As at June 30, 2021, the remaining commitments related to the financial liabilities of these nine LNG carriers, including the amounts to be paid for the related purchase obligations, approximated $1.7 billion, including imputed interest of $366.8 million, repayable for the remainder of 2021 through 2034, as indicated below: Commitments as at Year $ Remainder of 2021 69,063 2022 136,959 2023 135,459 2024 132,011 2025 129,725 Thereafter 1,068,641

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following tables contain the Partnership’s revenue for the three and six months ended June 30, 2021 and 2020, by contract type and by segment. Three Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Time charters 133,908 1,687 135,595 135,761 — 135,761 Voyage charters — 10,318 10,318 — 10,383 10,383 Management fees and other income 2,856 — 2,856 2,061 — 2,061 136,764 12,005 148,769 137,822 10,383 148,205 Six Months Ended June 30, 2021 2020 LNG LPG Total LNG LPG Total Time charters 273,426 3,806 277,232 266,306 — 266,306 Voyage charters — 19,585 19,585 — 17,700 17,700 Management fees and other income 4,754 — 4,754 4,086 — 4,086 278,180 23,391 301,571 270,392 17,700 288,092 The following table contains the Partnership’s revenue for the three and six months ended June 30, 2021 and 2020, by contracts or components of contracts accounted for as leases and those not accounted for as leases: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 $ $ $ $ Lease revenue Lease revenue from lease payments of operating leases 126,459 127,289 258,303 246,888 Interest income on lease receivables 12,294 12,595 24,529 25,261 Variable lease payments - cost reimbursements (1) 1,700 1,263 3,145 2,320 140,453 141,147 285,977 274,469 Non-lease revenue Non-lease revenue - related to direct financing leases 5,460 4,997 10,840 9,537 Management fees and other income 2,856 2,061 4,754 4,086 8,316 7,058 15,594 13,623 Total 148,769 148,205 301,571 288,092 (1) Reimbursements for vessel operating expenditures and dry-docking expenditures received from the Partnership's customers relating to such costs incurred by the Partnership to operate the vessel for the customer pursuant to charter contracts accounted for as operating leases.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2021
Debt Disclosure [Abstract]
Components of Long-Term Debt	June 30, 2021 December 31, 2020 $ $ U.S. Dollar-denominated Revolving Credit Facilities due in 2022 105,000 100,000 U.S. Dollar-denominated Term Loans and Bonds due from 2021 to 2030 833,295 873,712 Norwegian Krone-denominated Bonds due from 2021 to 2025 354,486 355,514 Euro-denominated Term Loans due in 2023 and 2024 134,447 152,710 Total principal 1,427,228 1,481,936 Unamortized discount and debt issuance costs (9,849) (9,723) Total debt 1,417,379 1,472,213 Less current portion (355,081) (250,508) Long-term debt 1,062,298 1,221,705

Income Tax (Tables)

Income Tax (Tables)	6 Months Ended
	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Components of Provision for Income Taxes	The components of the provision for income tax (expense) recovery are as follows: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 $ $ $ $ Current (1,264) 1,131 (2,650) (1,381) Deferred (551) 673 1,612 673 Income tax (expense) recovery (1,815) 1,804 (1,038) (708)

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2021
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	The following table and related footnotes provide information about certain of the Partnership's related party transactions for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 $ $ $ $ Voyage revenues (i) 10,300 9,200 19,416 18,177 Vessel operating expenses (ii) (2,886) (1,337) (5,158) (2,733) Time-charter hire expenses (iii) (5,867) (5,368) (11,717) (11,290) General and administrative expenses (iv) (4,145) (3,787) (8,992) (7,585) Equity income (v) 602 603 1,198 1,206

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Cross Currency Swap Agreements	Foreign Exchange Risk From time to time, the Partnership economically hedges portions of its forecasted expenditures denominated in foreign currencies with foreign currency forward contracts. As at June 30, 2021, the Partnership was not committed to any foreign currency forward contracts. The Partnership entered into cross currency swaps concurrently with the issuance of its NOK-denominated senior unsecured bonds (see Note 8), and pursuant to these swaps, the Partnership receives the principal amount in NOK on maturity dates of the swaps in exchange for payments 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 of the Partnership’s NOK-denominated bonds due in 2021, 2023 and 2025, and to economically hedge the interest rate exposure. The following table reflects information relating to the cross currency swaps as at June 30, 2021. Floating Rate Receivable Principal Principal Reference Rate Margin Fixed Rate Fair Value / Weighted- 1,200,000 146,500 NIBOR 6.00% 7.72% (8,667) 0.3 850,000 102,000 NIBOR 4.60% 7.89% (9,843) 2.2 1,000,000 112,000 NIBOR 5.15% 5.74% 5,806 4.2 (12,704)
Interest Rate Swap Agreements	As at June 30, 2021, the Partnership was committed to the following interest rate swap agreements: Interest Principal Fair Weighted- Fixed Interest Rate (i) LIBOR-Based Debt: U.S. Dollar-denominated interest rate swaps (ii) LIBOR 186,745 434 4.7 0.7% U.S. Dollar-denominated interest rate swaps (iii) LIBOR 5,356 (69) 0.1 2.8% U.S. Dollar-denominated interest rate swaps (ii)(iv) LIBOR 141,386 (2,682) 3.2 1.4% U.S. Dollar-denominated interest rate swaps (ii) LIBOR 288,510 (22,915) 2.6 3.6% U.S. Dollar-denominated interest rate swaps (ii) LIBOR 153,945 (8,814) 5.5 2.3% EURIBOR-Based Debt: Euro-denominated interest rate swaps (v) EURIBOR 62,945 (4,639) 2.2 3.9% (38,685) (i) Excludes the margins the Partnership pays on its floating-rate term loans, which, at June 30, 2021, ranged from 0.60% to 3.25%. (ii) Principal amount reduces quarterly. (iii) Principal amount reduces semi-annually. (iv) These interest rate swaps are subject to mandatory early termination in 2024 whereby the swaps will be settled based on their fair value at that time. (v) Principal amount reduces monthly.
Classification and Fair Value Amounts of Derivative Instruments	The following table presents the classification and fair value amounts of derivative instruments, segregated by type of contract, on the Partnership’s consolidated balance sheets. Current portion of derivative Derivative Accrued Current portion of derivative Derivative As at June 30, 2021 Derivatives designated as a cash flow hedge: Interest rate swap agreements — — (63) (3,077) (5,673) Derivatives not designated as a cash flow hedge: Interest rate swap agreements — 1,363 (2,247) (12,442) (16,546) Cross currency swap agreements 258 5,562 (756) (10,856) (6,912) 258 6,925 (3,066) (26,375) (29,131) As at December 31, 2020 Derivatives designated as a cash flow hedge: Interest rate swap agreements — — (70) (3,162) (9,631) Derivatives not designated as a cash flow hedge: Interest rate swap agreements — — (4,823) (42,329) (15,453) Cross currency swap agreements — 4,505 (701) (11,434) (7,887) — 4,505 (5,594) (56,925) (32,971)
Gain (Loss) for Derivative Instruments Not Designated or Qualifying as Hedging Instruments	Three Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Interest rate swap agreements (3,925) 1,055 (2,870) (3,662) (4,854) (8,516) Six Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Interest rate swap agreements (8,398) 30,158 21,760 (6,573) (22,375) (28,948) Interest rate swap agreement (18,012) — (18,012) — — — Foreign currency forward contracts — — — (241) 202 (39) (26,410) 30,158 3,748 (6,814) (22,173) (28,987) Three Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Cross currency swap agreements (1,293) (2,262) (3,555) (1,430) 45,881 44,451 Cross currency swap agreements — — — (33,844) — (33,844) (1,293) (2,262) (3,555) (35,274) 45,881 10,607 Six Months Ended June 30, 2021 2020 Realized Unrealized Total Realized Unrealized Total $ $ $ $ $ $ Cross currency swap agreements (2,638) 2,867 229 (3,247) (3,659) (6,906) Cross currency swap agreements — — — (33,844) — (33,844) (2,638) 2,867 229 (37,091) (3,659) (40,750)
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)	The following table excludes any interest rate swap agreements designated and qualifying as cash flow hedges in the Partnership’s equity-accounted joint ventures. Three Months Ended June 30, 2021 Three Months Ended June 30, 2020 Amount of Loss Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense Amount of Loss Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense (435) (825) (1,055) (482) Six Months Ended June 30, 2021 Six Months Ended June 30, 2020 Amount of Gain Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense Amount of Loss Recognized in OCI Amount of Loss Reclassified from Accumulated OCI to Interest Expense 4,040 (1,640) (10,226) (634)

Commitments and Contingencies C

Commitments and Contingencies Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Unrecorded Unconditional Purchase Obligations Disclosure	The Partnership’s share of commitments to fund equipment installation and other construction contract costs as at June 30, 2021 is as follows: Total Remainder of 2022 Certain consolidated LNG carriers (i) 27,866 13,012 14,854 Bahrain LNG Joint Venture (ii) 11,339 11,339 — 39,205 24,351 14,854 (i) In June 2019, the Partnership entered into an agreement with a contractor to supply reliquefaction equipment on certain of the Partnership's LNG carriers in 2021 and 2022, for an estimated installed cost of $54.8 million. As at June 30, 2021, the estimated remaining cost of these installations was $27.9 million. (ii) The Partnership has a 30% ownership interest in the Bahrain LNG Joint Venture which has an LNG receiving and regasification terminal in Bahrain. As at June 30, 2021, the Partnership's proportionate share of the estimated remaining cost of $11.3 million relates to the final construction installment on the LNG terminal. The Bahrain LNG Joint Venture has remaining undrawn debt financing of $24 million, of which $7 million relates to the Partnership's proportionate share of the construction commitments included in the table above.

Total Capital and Net Income _2

Total Capital and Net Income Per Unit Total Capital and Net Income Per Unit (Tables)	6 Months Ended
	Jun. 30, 2021
Equity [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three Months Ended June 30, 2021 2020 $ $ Limited partners' interest in net income for basic net income per common unit 46,040 37,796 Weighted average number of common units 86,970,999 82,197,665 Dilutive effect of unit-based compensation 162,147 64,570 Weighted average number of common units and common unit equivalents 87,133,146 82,262,235 Limited partner's interest in net income per common unit: Basic 0.53 0.46 Diluted 0.53 0.46 Six Months Ended June 30, 2021 2020 $ $ Limited partners' interest in net income (loss) for basic net income (loss) per common unit 125,780 (834) Weighted average number of common units 86,963,374 79,629,623 Dilutive effect of unit-based compensation 149,142 — Weighted average number of common units and common unit equivalents 87,112,516 79,629,623 Limited partner's interest in net income (loss) per common unit: Basic 1.45 (0.01) Diluted 1.44 (0.01)

Basis of Presentation Narrative

Basis of Presentation Narrative (Details)	Mar. 31, 2020vessel
LPG Carriers [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number Of Vessels	6

Financial Instruments - Schedul

Financial Instruments - Schedule of Estimated Fair Value and Carrying Value of Partnership's Financial Instruments on Recurring and Non-Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents and restricted cash (note 15)	$ 190,200	$ 257,943	$ 292,475	$ 253,291
Long-term debt	(1,417,379)	(1,472,213)
Obligations related to finance leases (note 5a)	1,305,055	1,340,922
Property, Plant and Equipment, Net, Excluding Capital Leased Assets	1,197,551	1,220,355
Carrying Amount Asset (Liability)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans to equity-accounted joint ventures (note 7)	106,301	116,632
Carrying Amount Asset (Liability) | Level 1 | Public
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	(351,786)	(352,260)
Carrying Amount Asset (Liability) | Level 1 | Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents and restricted cash (note 15)	190,200	257,943
Carrying Amount Asset (Liability) | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Obligations related to finance leases (note 5a)	1,305,055	1,340,922
Carrying Amount Asset (Liability) | Level 2 | Non-public
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	(1,065,593)	(1,119,953)
Carrying Amount Asset (Liability) | Level 2 | Recurring | LPG Carriers [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Property, Plant and Equipment, Net, Excluding Capital Leased Assets	0	40,717
Carrying Amount Asset (Liability) | Level 2 | Recurring | Interest rate swap agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap agreements – assets	1,363	0
Interest rate swap agreements – liabilities	(40,048)	(75,468)
Carrying Amount Asset (Liability) | Level 2 | Recurring | Cross-currency swap agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	5,820	4,505
Cross currency swap agreements – liabilities	(18,524)	(20,022)
Fair Value Asset (Liability) | Level 1 | Public
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	(360,319)	(359,581)
Fair Value Asset (Liability) | Level 1 | Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents and restricted cash (note 15)	190,200	257,943
Fair Value Asset (Liability) | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Obligations related to finance leases (note 5a)	1,386,363	1,456,927
Fair Value Asset (Liability) | Level 2 | Non-public
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	(1,084,437)	(1,137,050)
Fair Value Asset (Liability) | Level 2 | Recurring | LPG Carriers [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Property, Plant and Equipment, Net, Excluding Capital Leased Assets	0	40,717
Fair Value Asset (Liability) | Level 2 | Recurring | Interest rate swap agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap agreements – assets	1,363	0
Interest rate swap agreements – liabilities	(40,048)	(75,468)
Fair Value Asset (Liability) | Level 2 | Recurring | Cross-currency swap agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	5,820	4,505
Cross currency swap agreements – liabilities	$ (18,524)	$ (20,022)

Financial Instruments - Summary

Financial Instruments - Summary of Partnership's Financing receivables and Direct financing leases (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items]
Total Lease and Financing Lease Receivable Originated three years prior to the latest fiscal year	$ 210,795
Total Lease and Financing Lease Receivable Originated one year prior to the latest fiscal year	660
Total Lease and Financing Lease Receivable	643,262	$ 660,879
Total Lease and Financing Lease Receivable Originated five or more years prior to the latest fiscal year	431,807
Total Lease and Financing Lease Receivable Originated four years prior to the latest fiscal year		447,949
Total Lease and Financing Lease Receivable Originated two years prior to the latest fiscal year		211,939
Total Lease and Financing Lease Receivable Current year		991
Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Net Investment in Lease, Originated Four Years before Latest Fiscal Year		332,308
Net Investment in Lease, Originated Five or More Years before Latest Fiscal Year	326,166
Net Investment in Lease	536,961	544,247
Direct Financing Lease, Net Investment in Lease, Originated Two Years before Latest Fiscal Year		211,939
Direct Financing Lease, Net Investment in Lease, Year One, Originated, Current Fiscal Year		0
Direct Financing Lease, Net Investment in Lease, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Direct Financing Lease, Net Investment in Lease, Year Four, Originated, Three Years before Current Fiscal Year	210,795
Performing Financial Instruments [Member] | Corporate Joint Venture [Member]
Financing Receivable, Recorded Investment [Line Items]
Net Investment in Lease, Originated Four Years before Latest Fiscal Year		332,308
Net Investment in Lease, Originated Five or More Years before Latest Fiscal Year	326,166
Net Investment in Lease	326,166	332,308
Direct Financing Lease, Net Investment in Lease, Originated Two Years before Latest Fiscal Year		0
Direct Financing Lease, Net Investment in Lease, Year One, Originated, Current Fiscal Year		0
Direct Financing Lease, Net Investment in Lease, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Direct Financing Lease, Net Investment in Lease, Year Four, Originated, Three Years before Current Fiscal Year	0
Performing Financial Instruments [Member] | Subsidiaries
Financing Receivable, Recorded Investment [Line Items]
Net Investment in Lease, Originated Four Years before Latest Fiscal Year		0
Net Investment in Lease, Originated Five or More Years before Latest Fiscal Year	0
Net Investment in Lease	210,795	211,939
Direct Financing Lease, Net Investment in Lease, Originated Two Years before Latest Fiscal Year		211,939
Direct Financing Lease, Net Investment in Lease, Year One, Originated, Current Fiscal Year		0
Direct Financing Lease, Net Investment in Lease, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Direct Financing Lease, Net Investment in Lease, Year Four, Originated, Three Years before Current Fiscal Year	210,795
Loans Receivable [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated Two Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		115,641
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	105,641
Financing Receivable, before Allowance for Credit Loss	106,301	116,632
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	660
Financing Receivable, Year One, Originated, Current Fiscal Year		991
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Loans Receivable [Member] | Exmar Lpg Bvba [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated Two Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		42,266
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	32,266
Financing Receivable, before Allowance for Credit Loss	32,266	42,266
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Loans Receivable [Member] | Bahrain LNG Joint Venture [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated Two Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		73,375
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	73,375
Financing Receivable, before Allowance for Credit Loss	73,375	73,375
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Loans Receivable [Member] | Angola LNG Joint Venture | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Originated Two Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0
Financing Receivable, before Allowance for Credit Loss	660	991
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	660
Financing Receivable, Year One, Originated, Current Fiscal Year		$ 991
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	$ 0

Financial Instruments Financial

Financial Instruments Financial Instruments - Financing Receivables, allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Direct Financing Lease, Net Investment in Lease, Allowance for Credit Loss	$ 35,400	$ 34,613	$ 11,520	$ 11,055	$ 35,400	$ 11,520	$ 30,177	$ 11,155
Total credit loss provision	103,736	102,270	62,017	62,180	103,736	62,017	91,920	53,300
Net Investment in Lease, Allowance for Credit Loss			(423)
Direct Financing Lease, Net Investment in Lease, Credit Loss Expense (Reversal)	787	4,436	465	(100)	5,200	400
Total credit loss expense (reversal)	1,466	10,350	(163)	8,880
LNG Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Direct Financing Lease, Net Investment in Lease, Credit Loss Expense (Reversal)	800		500
Financial Guarantee [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Off-Balance Sheet, Credit Loss, Liability	2,000	2,298	1,851	2,139	2,000	1,851	2,080	2,139
Off-Balance Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal)	(298)	218	(288)	0
Loans Receivable [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans to equity-accounted joint ventures	4,000	3,745	3,797	3,714	4,000	3,797	4,726	3,714
Financing Receivable, Credit Loss, Expense (Reversal)	255	(981)	83	0
Equity Method Investments [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Net Investment in Lease, Allowance for Credit Loss	62,336	61,614	44,849	45,272	62,336	44,849	$ 54,937	$ 36,292
Net Investment in Lease, Allowance for Credit Loss	$ 722	$ 6,677	$ (400)	$ 8,980	$ 7,400	$ 8,600

Segment Reporting - Segment Rep

Segment Reporting - Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Voyage revenues	$ 148,769	$ 148,205	$ 301,571	$ 288,092
Voyage expenses	(6,360)	(5,329)	(13,543)	(7,646)
Vessel operating expenses	(32,536)	(28,407)	(62,625)	(54,511)
Time-charter hire expenses	(5,867)	(5,368)	(11,717)	(11,290)
Depreciation and amortization	(32,349)	(31,629)	(64,251)	(64,268)
General and administrative expenses	(6,921)	(7,883)	(14,088)	(14,050)
Income (loss) from vessel operations	64,736	69,589	135,347	91,327
Equity income (loss)	28,940	32,155	66,456	32,528
Asset Impairment Charges	0	0	0	(45,000)
LNG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	136,764	137,822	278,180	270,392
Voyage expenses	(841)	(806)	(2,970)	(1,835)
Vessel operating expenses	(27,260)	(24,599)	(52,843)	(46,691)
Time-charter hire expenses	(5,867)	(5,368)	(11,717)	(11,290)
Depreciation and amortization	(30,660)	(30,566)	(60,892)	(61,158)
General and administrative expenses	(6,268)	(7,251)	(12,871)	(13,004)
Income (loss) from vessel operations	65,868	69,232	136,887	136,414
Equity income (loss)	26,000	27,795	58,939	27,977
Asset Impairment Charges			0	0
LPG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	12,005	10,383	23,391	17,700
Voyage expenses	(5,519)	(4,523)	(10,573)	(5,811)
Vessel operating expenses	(5,276)	(3,808)	(9,782)	(7,820)
Time-charter hire expenses	0	0	0	0
Depreciation and amortization	(1,689)	(1,063)	(3,359)	(3,110)
General and administrative expenses	(653)	(632)	(1,217)	(1,046)
Income (loss) from vessel operations	(1,132)	357	(1,540)	(45,087)
Equity income (loss)	2,940	4,360	7,517	4,551
Asset Impairment Charges			0	(45,000)
Operating Segments
Segment Reporting Information [Line Items]
Voyage revenues	148,769	148,205	301,571	288,092
Voyage expenses	(6,360)	(5,329)	(13,543)	(7,646)
Vessel operating expenses	(32,536)	(28,407)	(62,625)	(54,511)
Time-charter hire expenses	(5,867)	(5,368)	(11,717)	(11,290)
Depreciation and amortization	(32,349)	(31,629)	(64,251)	(64,268)
General and administrative expenses	(6,921)	(7,883)	(14,088)	(14,050)
Income (loss) from vessel operations	64,736	69,589	135,347	91,327
Equity income (loss)	$ 28,940	$ 32,155	66,456	32,528
Asset Impairment Charges			$ 0	$ (45,000)

Segment Reporting - Reconciliat

Segment Reporting - Reconciliation of Total Segment Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 4,805,965	$ 4,854,004
Unallocated:
Cash and cash equivalents	144,206	206,762	$ 226,328	$ 160,221
Advances to affiliates	6,940	4,924
LNG Segment [Member]
Segment Reporting Information [Line Items]
Total assets	4,411,512	4,395,336
LPG Segment [Member]
Segment Reporting Information [Line Items]
Total assets	243,307	246,982
Cash and Cash Equivalents [Member]
Unallocated:
Cash and cash equivalents	144,206	206,762
Affiliated Entity [Member]
Unallocated:
Advances to affiliates	$ 6,940	$ 4,924

Chartered-in Vessels - Obligati

Chartered-in Vessels - Obligations related to Finance Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Obligations relating to Finance Leases [Line Items]
Finance lease liability	$ 1,305,055	$ 1,340,922
Current obligations related to finance leases (note 5a)	72,925	71,932
Long-term obligations related to finance leases (note 5a)	$ 1,232,130	$ 1,268,990

Chartered-in Vessels Chartered-

Chartered-in Vessels Chartered-in Vessels - Commitments Related to Finance Leases (Details) - Jun. 30, 2021 - LNG Carriers [Member] $ in Thousands	vessel	lease	USD ($)
Obligations relating to Finance Leases [Line Items]
Number Of Vessels	9	9
Finance Lease, Liability, Payment, Due			$ 1,700,000
Finance Lease, Interest Payment on Liability			366,800
Finance Lease, Liability, Payments, Remainder of Fiscal Year			69,063
Finance Lease, Liability, Payments, Due Year Two			136,959
Finance Lease, Liability, Payments, Due Year Three			135,459
Finance Lease, Liability, Payments, Due Year Four			132,011
Finance Lease, Liability, Payments, Due Year Five			129,725
Finance Lease, Liability, Payments, Due after Year Five			$ 1,068,641

Chartered-in Vessels - Operatin

Chartered-in Vessels - Operating Leases (Details) $ in Millions	Jun. 30, 2021USD ($)vessel
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 12
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 11.1
Teekay Tangguh Joint Venture [Member]
Lessee, Lease, Description [Line Items]
Number Of Vessels | vessel	2
Teekay Lng Marubeni Joint Venture [Member]
Lessee, Lease, Description [Line Items]
Equity Method Investment, Ownership Percentage	52.00%

Chartered-in Vessels Obligation

Chartered-in Vessels Obligations related to Finance Leases - Additional Information (Details) - LNG Carriers [Member]	36 Months Ended
	Jan. 31, 2019	Jun. 30, 2021vessel	Jun. 30, 2021lease
Obligations relating to Finance Leases [Line Items]
Number Of Vessels		9	9
Sale Leaseback Transaction, Imputed Interest Rate	5.10%
Minimum [Member]
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Lease Terms	7.5
Maximum [Member]
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Lease Terms	15

Revenue - Disaggregation (Detai

Revenue - Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Voyage revenues	$ 148,769	$ 148,205	$ 301,571	$ 288,092
LNG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	136,764	137,822	278,180	270,392
LPG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	12,005	10,383	23,391	17,700
Time charters
Segment Reporting Information [Line Items]
Voyage revenues	135,595	135,761	277,232	266,306
Time charters | LNG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	133,908	135,761	273,426	266,306
Time charters | LPG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	1,687	0	3,806	0
Voyage charters
Segment Reporting Information [Line Items]
Voyage revenues	10,318	10,383	19,585	17,700
Voyage charters | LNG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	0	0	0	0
Voyage charters | LPG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	10,318	10,383	19,585	17,700
Management fees and other
Segment Reporting Information [Line Items]
Voyage revenues	2,856	2,061	4,754	4,086
Management fees and other | LNG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	2,856	2,061	4,754	4,086
Management fees and other | LPG Segment [Member]
Segment Reporting Information [Line Items]
Voyage revenues	0	0	0	0
Non-lease revenue
Segment Reporting Information [Line Items]
Voyage revenues	5,460	4,997	10,840	9,537
Lease revenue
Segment Reporting Information [Line Items]
Voyage revenues	140,453	141,147	285,977	274,469
Operating Lease, Variable Lease Income	1,700	1,263	3,145	2,320
Operating Lease, Lease Income	126,459	127,289	258,303	246,888
Direct Financing Lease, Interest Income	12,294	12,595	24,529	25,261
Non Lease Component [Member]
Segment Reporting Information [Line Items]
Voyage revenues	$ 8,316	$ 7,058	$ 15,594	$ 13,623

Revenue - Net Investments in Di

Revenue - Net Investments in Direct Financing Leases (Details) $ in Millions	Jun. 30, 2021vessel	Jun. 30, 2021lease	Jun. 30, 2021USD ($)	Dec. 31, 2020lease	Jan. 07, 2020vessel	Jan. 07, 2020lease	Jan. 07, 2020USD ($)
Lessor, Lease, Description [Line Items]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Remainder of Fiscal Year			$ 32.3
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years			64
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years			64.3
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years			64.2
Purchase Obligation And Deferred Hire Amounts							$ 260.4
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, Year One			64.2
Sales-Type and Direct Financing Leases, Lease Receivable, to be Received, after Year Four			$ 446.5
LNG Carriers [Member]
Lessor, Lease, Description [Line Items]
Number Of Vessels	9	9
LNG Carriers [Member] | Direct Financing Lease [Member]
Lessor, Lease, Description [Line Items]
Number Of Vessels | lease		3		3
Awilco Lng Carrier
Lessor, Lease, Description [Line Items]
Number Of Vessels					2	2

Revenue - Narrative (Details)

Revenue - Narrative (Details)	6 Months Ended
	Jun. 30, 2021contract
Leases [Abstract]
Number of Forms of Contracts	2

Revenue - Operating leases (Det

Revenue - Operating leases (Details) $ in Millions	Jun. 30, 2021USD ($)
Leases [Abstract]
Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year	$ 229.1
Lessor, Operating Lease, Payments to be Received, Two Years	309.9
Lessor, Operating Lease, Payments to be Received, Three Years	252.9
Lessor, Operating Lease, Payment to be Received, Year One	373
Lessor, Operating Lease, Payment to be Received, after Year Four	$ 197.4

Revenue - Contract costs (Detai

Revenue - Contract costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Contract with Customer, Liability	$ 14	$ 26.4	$ 14	$ 26.4	$ 26.5	$ 24.9
Contract with Customer, Liability, Revenue Recognized	$ 19.9	$ 22	$ 26.5	$ 24.9

Equity-Accounted Joint Ventur_2

Equity-Accounted Joint Ventures Equity-Accounted Joint Ventures (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)vessel	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)vessel	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Schedule of Equity Method Investments [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,300,000		$ 1,300,000
Due from Joint Ventures, Current	$ 8,160		$ 8,160		$ 10,991
Angola LNG Joint Venture
Schedule of Equity Method Investments [Line Items]
Number Of Vessels | vessel	3		3
Bahrain LNG Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Advances to equity-accounted joint ventures, current and long-term (note 7)	$ 73,400		$ 73,400
Ownership percentage	30.00%		30.00%
Debt Instrument, Interest Rate During Period			6.00%
Interest receivable on advances to equity accounted joint ventures	$ 7,500		$ 7,500		5,100
Interest Income, Related Party	$ 1,200	$ 1,100	$ 2,400	$ 2,200
Exmar LPG Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%		50.00%
Interest receivable on advances to equity accounted joint ventures	$ 0		$ 0
Interest Income, Related Party	100	$ 300	200	$ 600
Due from Joint Ventures	$ 32,300		$ 32,300		42,300
Exmar LPG Joint Venture [Member] | LIBOR
Schedule of Equity Method Investments [Line Items]
Variable interest rate on debt			0.50%
Angola LNG Joint Venture
Schedule of Equity Method Investments [Line Items]
Ownership percentage	33.00%		33.00%
Due from Joint Ventures, Current	$ 700		$ 700		$ 1,000
Angola LNG Joint Venture | LIBOR
Schedule of Equity Method Investments [Line Items]
Variable interest rate on debt			1.00%

Long-Term Debt - Components of

Long-Term Debt - Components of Long-Term Debt (Details) $ in Thousands, € in Millions	Jun. 30, 2021USD ($)	Jun. 30, 2021EUR (€)	Dec. 31, 2020USD ($)	Dec. 31, 2020EUR (€)
Debt Instrument [Line Items]
Total principal	$ 1,427,228		$ 1,481,936
Unamortized discount and debt issuance costs	(9,849)		(9,723)
Total debt	1,417,379		1,472,213
Less current portion	(355,081)		(250,508)
Long-term debt	1,062,298		1,221,705
U.S. Dollar-denominated Revolving Credit Facilities due in 2022
Debt Instrument [Line Items]
Total principal	105,000		100,000
Norwegian Krone-denominated Bonds due from 2021 to 2025
Debt Instrument [Line Items]
Total principal	354,486		355,514
Euro-denominated Term Loans due in 2023 and 2024
Debt Instrument [Line Items]
Total principal	134,400	€ 113.4	152,710	€ 125
Secured Debt
Debt Instrument [Line Items]
Total principal			873,712
US Dollar Denominated Term Loans Due through Two Thousand Thirty
Debt Instrument [Line Items]
Total principal	$ 833,295		$ 873,700

Long-Term Debt - Revolvers - Ad

Long-Term Debt - Revolvers - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021USD ($)credit_facilityvessel	Dec. 31, 2020USD ($)
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity, reduction for remainder of year	$ 195.6
Line of credit facility, borrowing capacity, reduction in year two	236.4
Line of credit facility, borrowing capacity, reduction in year three	$ 125.1
Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	0.60%
Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	3.25%
Line of Credit
Debt Instrument [Line Items]
Number Of Vessels | vessel	2
Unsecured Debt
Debt Instrument [Line Items]
Number of credit facilities | credit_facility	1
Revolving Credit Facilities
Debt Instrument [Line Items]
Line Of Credit Reduction Of Available Borrowing Capacity Remainder Of Fiscal Year	$ 12.3
Line Of Credit Reduction Of Available Borrowing Capacity in Year One	$ 330.4
Revolving Credit Facilities | Line of Credit
Debt Instrument [Line Items]
Number of credit facilities | credit_facility	2
Line of credit facility, maximum borrowing capacity	$ 342.7	$ 354.8
Undrawn amount of revolving credit facilities	$ 237.7	$ 254.8
Revolving Credit Facilities | Line of Credit | LIBOR | Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	1.40%
Revolving Credit Facilities | Line of Credit | LIBOR | Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	2.25%

Long-Term Debt - USD Term Loans

Long-Term Debt - USD Term Loans - Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)term_loanvessel	Dec. 31, 2020USD ($)
Debt Instrument [Line Items]
Number of Term Loans | term_loan	6
Aggregate principal amount	$ 1,427,228	$ 1,481,936
Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	0.60%
Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	3.25%
Line of Credit
Debt Instrument [Line Items]
Number Of Vessels | vessel	2
Secured Debt
Debt Instrument [Line Items]
Aggregate principal amount		873,712
US Dollar Denominated Term Loans Due through Two Thousand Thirty
Debt Instrument [Line Items]
Aggregate principal amount	$ 833,295	$ 873,700
US Dollar Denominated Term Loans Due through Two Thousand Thirty | Asset Pledged as Collateral [Member]
Debt Instrument [Line Items]
Number Of Vessels | vessel	15
US Dollar Denominated Term Loans Due through Two Thousand Thirty | Minimum [Member]
Debt Instrument [Line Items]
Fixed interest rate on debt	4.11%
US Dollar Denominated Term Loans Due through Two Thousand Thirty | Maximum [Member]
Debt Instrument [Line Items]
Fixed interest rate on debt	4.41%
US Dollar Denominated Term Loans Due through Two Thousand Thirty | LIBOR | Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	1.85%
US Dollar Denominated Term Loans Due through Two Thousand Thirty | LIBOR | Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt	3.25%
Teekay Nakilat Joint Venture | Teekay Lng [Member]
Debt Instrument [Line Items]
Percentage of ownership interest	70.00%

Long-Term Debt - NOK Bonds - Ad

Long-Term Debt - NOK Bonds - Additional Information (Details) $ in Thousands, kr in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021NOK (kr)	Dec. 31, 2020USD ($)	Dec. 31, 2020NOK (kr)
Debt Instrument [Line Items]
Carrying amount of debt	$ 1,427,228		$ 1,427,228			$ 1,481,936
Foreign exchange gains (losses)	(2,843)	$ (11,624)	$ 4,117	$ (6,885)
Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			0.60%
Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			3.25%
Unsecured Debt
Debt Instrument [Line Items]
Senior unsecured bonds issued | kr					kr 3,100		kr 3,100
Carrying amount of debt	354,486		$ 354,486			$ 355,514
Unsecured Debt | Cross-currency swap agreements
Debt Instrument [Line Items]
Derivative, Notional Amount	$ 360,500		$ 360,500
Unsecured Debt | Minimum [Member] | Cross-currency swap agreements
Debt Instrument [Line Items]
Fixed Rate Payable	5.74%		5.74%		5.74%
Unsecured Debt | Maximum [Member] | Cross-currency swap agreements
Debt Instrument [Line Items]
Fixed Rate Payable	7.89%		7.89%		7.89%
Unsecured Debt | NIBOR | Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			4.60%
Unsecured Debt | NIBOR | Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			6.00%

Long-Term Debt - Euro-denominat

Long-Term Debt - Euro-denominated Term Loans- Additional Information (Details) $ in Thousands, € in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)subsidiaryterm_loanvessel	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)subsidiaryterm_loanvessel	Jun. 30, 2020USD ($)	Jun. 30, 2021EUR (€)subsidiaryterm_loanvessel	Dec. 31, 2020USD ($)	Dec. 31, 2020EUR (€)
Debt Instrument [Line Items]
Number of Term Loans	6		6		6
Carrying amount of debt | $	$ 1,427,228		$ 1,427,228			$ 1,481,936
Foreign currency exchange (loss) gain (notes 8 and 11) | $	$ (2,843)	$ (11,624)	$ 4,117	$ (6,885)
Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			0.60%
Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			3.25%
Line of Credit
Debt Instrument [Line Items]
Number Of Vessels | vessel	2		2		2
Line of Credit | Financial Guarantee [Member]
Debt Instrument [Line Items]
Number of subsidiaries that guaranteed the term loans | subsidiary	2		2		2
Euro-denominated Term Loans due in 2023 and 2024
Debt Instrument [Line Items]
Number of Term Loans	2		2		2
Carrying amount of debt	$ 134,400		$ 134,400		€ 113.4	$ 152,710	€ 125
Euro-denominated Term Loans due in 2023 and 2024 | Asset Pledged as Collateral [Member]
Debt Instrument [Line Items]
Number Of Vessels | vessel	2		2		2
Euro-denominated Term Loans due in 2023 and 2024 | Financial Guarantee [Member]
Debt Instrument [Line Items]
Number of subsidiaries that guaranteed the term loans | subsidiary	1		1		1
Euro-denominated Term Loans due in 2023 and 2024 | EURIBOR
Debt Instrument [Line Items]
Number of Term Loans	1		1		1
Euro-denominated Term Loans due in 2023 and 2024 | EURIBOR | Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			0.60%
Euro-denominated Term Loans due in 2023 and 2024 | EURIBOR | Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			1.95%

Long-Term Debt - Other - Additi

Long-Term Debt - Other - Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)term_loancredit_facility	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)term_loancredit_facility	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Debt Instrument [Line Items]
Carrying amount of debt	$ 1,427,228		$ 1,427,228		$ 1,481,936
Weighted-average interest rate for the Partnership's long-term debt outstanding	3.22%		3.22%		3.04%
Foreign exchange gains (losses)	$ (2,843)	$ (11,624)	$ 4,117	$ (6,885)
Aggregate annual long-term debt principal repayments, for remainder of year	195,600		195,600
Aggregate annual long-term debt principal repayments, year two	236,400		236,400
Aggregate annual long-term debt principal repayments, year three	125,100		125,100
Aggregate annual long-term debt principal repayments, year four	$ 187,400		$ 187,400
Number of loan facilities | term_loan	6		6
Long-term debt	$ 1,417,379		$ 1,417,379		$ 1,472,213
Long-Term Debt, Maturity, Year One	213,000		213,000
Long-Term Debt, Maturity, after Year Four	$ 469,700		$ 469,700
Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Number of loan facilities | credit_facility	5		5
Long-term debt	$ 525,400		$ 525,400
Minimum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			0.60%
Maximum [Member]
Debt Instrument [Line Items]
Variable interest rate on debt			3.25%
Long Term Debt1 [Member] | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	115.00%		115.00%
Long Term Debt1 [Member] | Vessel | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	400.00%		400.00%
Long Term Debt2 [Member] | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	120.00%		120.00%
Long Term Debt2 [Member] | Vessel | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	145.00%		145.00%
Long Term Debt3 [Member] | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	135.00%		135.00%
Long Term Debt3 [Member] | Vessel | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	195.00%		195.00%
Long Term Debt4 | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	110.00%		110.00%
Long Term Debt4 | Vessel | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	137.00%		137.00%
Long Term Debt5 Member | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	120.00%		120.00%
Long Term Debt5 Member | Vessel | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Percentage of vessel value to outstanding loan Principal balance	148.00%		148.00%
Teekay Nakilat Joint Venture | Fair Value Guarantee [Member]
Debt Instrument [Line Items]
Number of loan facilities | term_loan	1		1

Income Tax Income Tax (Details)

Income Tax Income Tax (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Current	$ (1,264)	$ 1,131	$ (2,650)	$ (1,381)
Deferred	(551)	673	1,612	673
Income tax (expense) recovery	$ (1,815)	$ 1,804	$ (1,038)	$ (708)

Related Party Transactions - Sc

Related Party Transactions - Schedule of Related Party Transactions (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)vessel	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)vessel	Jun. 30, 2020USD ($)	Jun. 30, 2021lease	Jun. 30, 2019
Related Party Transaction [Line Items]
Voyage revenues	$ 148,769	$ 148,205	$ 301,571	$ 288,092
Vessel operating expenses	(32,536)	(28,407)	(62,625)	(54,511)
Time-charter hire expenses	5,867	5,368	11,717	11,290
General and administrative expenses	(6,921)	(7,883)	(14,088)	(14,050)
Equity income (loss)	28,940	32,155	66,456	32,528
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Voyage revenues	10,300	9,200	19,416	18,177
Vessel operating expenses	(2,886)	(1,337)	(5,158)	(2,733)
Time-charter hire expenses	5,867	5,368	11,717	11,290
General and administrative expenses	(4,145)	(3,787)	(8,992)	(7,585)
Equity income (loss)	$ 602	603	$ 1,198	1,206
LNG Carriers [Member]
Related Party Transaction [Line Items]
Number Of Vessels	9		9		9
LNG Carriers [Member] | Affiliated Entity [Member] | Yamal Lng Joint Venture [Member]
Related Party Transaction [Line Items]
Number Of Vessels | vessel	6		6
Bahrain LNG Joint Venture [Member] | Affiliated Entity [Member] | Management Service [Member]
Related Party Transaction [Line Items]
Voyage revenues	$ 2,900	2,000	$ 4,800	4,100
Bahrain LNG Joint Venture [Member] | Affiliated Entity [Member] | Cargo and Freight [Member]
Related Party Transaction [Line Items]
Voyage revenues	$ 7,400	$ 7,200	$ 14,600	$ 14,100
Bahrain Spirit [Member]
Related Party Transaction [Line Items]
Lessor, Direct financing lease, Term of contract						21 years

Related Party Transactions - No

Related Party Transactions - Non-interest Bearing Advances - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Advances to affiliates	$ 6,940	$ 4,924
Advances from affiliates	8,086	11,047
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Advances to affiliates	6,900	4,900
Advances from affiliates	$ 8,100	$ 11,000

Related Party Transactions Rela

Related Party Transactions Related Party Transactions - Additional Information (Details) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended
	Apr. 30, 2020	Dec. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Dec. 31, 2020	May 11, 2020
Related Party Transaction [Line Items]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	$ 2,200		$ (462)	$ 2,700
Limited Partners' Capital Account, Units Issued					87,000	87,000	10,750
Subsidiaries of Teekay LNG [Member]
Related Party Transaction [Line Items]
Subsidiary of Limited Liability Company or Limited Partnership, Ownership Interest		1.00%

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Summary of Cross Currency Swap Agreements (Details) - Cross-currency swap agreements kr in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2021NOK (kr)
Derivative [Line Items]
Fair Value / Carrying Amount of Asset (Liability) $	$ (12,704)
NIBOR | 6.00%
Derivative [Line Items]
Derivative, Notional Amount	$ 146,500	kr 1,200,000
Derivative, Basis Spread on Variable Rate	6.00%	6.00%
Fixed Rate Payable	7.72%	7.72%
Fair Value / Carrying Amount of Asset (Liability) $	$ (8,667)
Weighted- Average Remaining Term (Years)	3 months 18 days
NIBOR | 4.60%
Derivative [Line Items]
Derivative, Notional Amount	$ 102,000	kr 850,000
Derivative, Basis Spread on Variable Rate	4.60%	4.60%
Fixed Rate Payable	7.89%	7.89%
Fair Value / Carrying Amount of Asset (Liability) $	$ (9,843)
Weighted- Average Remaining Term (Years)	2 years 2 months 12 days
NIBOR | 5.15%
Derivative [Line Items]
Derivative, Notional Amount	$ 112,000	kr 1,000,000
Derivative, Basis Spread on Variable Rate	5.15%	5.15%
Fixed Rate Payable	5.74%	5.74%
Fair Value / Carrying Amount of Asset (Liability) $	$ 5,806
Weighted- Average Remaining Term (Years)	4 years 2 months 12 days

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)
Minimum [Member]
Derivative [Line Items]
Variable interest rate on debt	0.60%
Maximum [Member]
Derivative [Line Items]
Variable interest rate on debt	3.25%
Interest rate swap agreements
Derivative [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	$ (38,685)
U.S. Dollar-denominated interest rate swaps 1 | LIBOR
Derivative [Line Items]
Derivative, Notional Amount	186,745
Fair Value / Carrying Amount of (Liability)	$ 434
Weighted- Average Remaining Term (Years)	4 years 8 months 12 days
Fixed Rate Payable	0.70%
U.S. Dollar-denominated interest rate swaps 2 | LIBOR
Derivative [Line Items]
Derivative, Notional Amount	$ 5,356
Fair Value / Carrying Amount of (Liability)	$ (69)
Weighted- Average Remaining Term (Years)	1 month 6 days
Fixed Rate Payable	2.80%
U.S. Dollar-denominated interest rate swaps 3 | LIBOR
Derivative [Line Items]
Derivative, Notional Amount	$ 141,386
Fair Value / Carrying Amount of (Liability)	$ (2,682)
Weighted- Average Remaining Term (Years)	3 years 2 months 12 days
Fixed Rate Payable	1.40%
U.S. Dollar-denominated interest rate swaps 4 | LIBOR
Derivative [Line Items]
Derivative, Notional Amount	$ 288,510
Fair Value / Carrying Amount of (Liability)	$ (22,915)
Weighted- Average Remaining Term (Years)	2 years 7 months 6 days
Fixed Rate Payable	3.60%
U.S. Dollar-denominated interest rate swaps 5 | LIBOR
Derivative [Line Items]
Derivative, Notional Amount	$ 153,945
Interest Rate Fair Value Hedge Derivative at Fair Value, Net	$ (8,814)
Weighted- Average Remaining Term (Years)	5 years 6 months
Fixed Rate Payable	2.30%
Euro-denominated interest rate swaps | EURIBOR
Derivative [Line Items]
Derivative, Notional Amount	$ 62,945
Fair Value / Carrying Amount of (Liability)	$ (4,639)
Weighted- Average Remaining Term (Years)	2 years 2 months 12 days
Fixed Rate Payable	3.90%

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Interest rate swaps and cross currency swaps agreement
Derivative [Line Items]
Fair value of derivative asset	$ 6.2	$ 4.5
Derivative Liability, Fair Value, Gross Liability	57.6	73.7
Derivative
Derivative [Line Items]
Deposit as security for swap liabilities	$ 0	$ 3.8

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities -Classification and Fair Value Amounts of Derivative Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Current portion of derivative assets	$ 258	$ 0
Derivative assets	6,925	4,505
Accrued liabilities	(64,113)	(81,706)
Current portion of derivative liabilities	(26,375)	(56,925)
Derivative liabilities (note 11)	29,131	32,971
Cross currency swap agreements
Derivatives, Fair Value [Line Items]
Current portion of derivative assets	258	0
Derivative assets	5,562	4,505
Accrued liabilities	(756)	(701)
Current portion of derivative liabilities	(10,856)	(11,434)
Derivative liabilities (note 11)	6,912	7,887
Derivative
Derivatives, Fair Value [Line Items]
Current portion of derivative assets	258	0
Derivative assets	6,925	4,505
Accrued liabilities	(3,066)	(5,594)
Current portion of derivative liabilities	(26,375)	(56,925)
Derivative liabilities (note 11)	29,131	32,971
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Current portion of derivative assets	0	0
Derivative assets	1,363	0
Accrued liabilities	(2,247)	(4,823)
Current portion of derivative liabilities	(12,442)	(42,329)
Derivative liabilities (note 11)	16,546	15,453
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Current portion of derivative assets	0	0
Derivative assets	0	0
Accrued liabilities	(63)	(70)
Current portion of derivative liabilities	(3,077)	(3,162)
Derivative liabilities (note 11)	$ 5,673	$ 9,631

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Gain (Loss) for Derivative Instruments Not Designated or Qualifying as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized gains (losses)			$ 30,158	$ (22,173)
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)	$ (2,870)	$ (8,516)	3,748	(28,987)
Foreign currency exchange (loss) gain (notes 8 and 11)	(2,843)	(11,624)	4,117	(6,885)
Unrealized gains (losses)			8,199	(3,660)
Foreign Currency Gain (Loss) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)	(3,555)	10,607
Realized gains (losses)	(1,293)	(35,274)		(37,091)
Unrealized gains (losses)	(2,262)	45,881
Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized gains (losses)			(26,410)	(6,814)
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)			3,748	(28,987)
Derivative Instruments Not Designated As Hedging Instruments Unrealized Gain (Loss) Net			30,158	(22,173)
Interest rate swap agreements | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized gains (losses)	(3,925)	(3,662)	(8,398)	(6,573)
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)	(2,870)	(8,516)	21,760	(28,948)
Derivative Instruments Not Designated As Hedging Instruments Unrealized Gain (Loss) Net	1,055	(4,854)	30,158	(22,375)
Foreign Exchange Forward [Member] | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized gains (losses)			0	(241)
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)			0	(39)
Derivative Instruments Not Designated As Hedging Instruments Unrealized Gain (Loss) Net			0	202
Cross currency swap agreements | Foreign Currency Gain (Loss) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized gains (losses)	(1,293)	(1,430)
Unrealized gains (losses)	(2,262)	45,881
Cross-currency swap agreements termination | Foreign Currency Gain (Loss) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Foreign currency exchange (loss) gain (notes 8 and 11)	0	(33,844)	0	(33,844)
Realized gains (losses)	0	(33,844)	0	(33,844)
Unrealized gains (losses)	0	0	0	0
Cross-currency swap agreements | Foreign Currency Gain (Loss) [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)			229	(40,750)
Foreign currency exchange (loss) gain (notes 8 and 11)	$ (3,555)	$ 44,451	229	(6,906)
Realized gains (losses)			(2,638)	(3,247)
Unrealized gains (losses)			2,867	(3,659)
Interest rate swaps terminated | Gain (Loss) on Derivative Instruments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Realized gains (losses)			(18,012)	0
Realized and unrealized (loss) gain on non-designated derivative instruments (note 11)			(18,012)	0
Derivative Instruments Not Designated As Hedging Instruments Unrealized Gain (Loss) Net			$ 0	$ 0

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities - Effective Portion of Gains (Losses) on Interest Rate Swap Agreements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Derivative [Line Items]
Amount of Loss Recognized in OCI	$ (16,948)	$ (11,081)	$ 21,059	$ (68,634)
Interest expense
Derivative [Line Items]
Amount of Loss Recognized in OCI	(435)	(1,055)	4,040	(10,226)
Amount of Loss Reclassified from Accumulated OCI to Interest Expense	$ (825)	$ (482)	$ (1,640)	$ (634)

Commitments and Contingencies -

Commitments and Contingencies - Commitments to Fund Newbuilding and Other Construction Contract Costs (Details) - USD ($) $ in Thousands	1 Months Ended
	Jun. 30, 2019	Jun. 30, 2021
Unrecorded Unconditional Purchase Obligation [Line Items]
Total estimated remaining costs		$ 39,205
Estimated Costs Remainder of 2020		24,351
Unrecorded Unconditional Purchase Obligation, to be Paid, Year One		14,854
Equity Method Investments [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Total estimated remaining costs		11,339
Estimated Costs Remainder of 2020		11,339
Unrecorded Unconditional Purchase Obligation, to be Paid, Year One		0
Consolidated Entities [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Total estimated remaining costs		27,866
Estimated Costs Remainder of 2020		13,012
Long-term Purchase Commitment, Amount	$ 54,800
Unrecorded Unconditional Purchase Obligation, to be Paid, Year One		$ 14,854
Bahrain LNG Joint Venture [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Equity Method Investment, Ownership Percentage		30.00%
Bahrain LNG Joint Venture [Member] | Building
Unrecorded Unconditional Purchase Obligation [Line Items]
Line of credit facility, maximum borrowing capacity		$ 24,000
Line of Credit Facility, Remaining Borrowing Capacity		7,000
Bahrain LNG Joint Venture [Member] | Construction [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Total estimated remaining costs		$ 11,300

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Loss Contingencies [Line Items]
Working Capital Surplus (Deficit)	$ (352,300)
Long-term Debt, Current Maturities	355,081	$ 250,508
Teekay Tangguh Joint Venture [Member]
Loss Contingencies [Line Items]
Estimated Tax Indemnification	$ 5,400	$ 5,700
Teekay Lng [Member] | Teekay Tangguh Joint Venture [Member]
Loss Contingencies [Line Items]
Percentage of ownership interest	70.00%

Total Capital and Net Income _3

Total Capital and Net Income Per Unit Partnership Units and Net Income Per Common Unit (Details) - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	May 11, 2020
Capital Unit [Line Items]
Limited Partners' Capital Account, Units Issued	87,000		87,000	10,750
Common Unit, Issuance Value				$ 122,600
General partner	$ (47,613)		$ (46,182)	(2,300)
Limited Partners' Capital Account	$ 1,545,448		$ 1,465,408	$ 2,300
Public | Teekay Lng [Member]
Capital Unit [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest	58.70%
Limited Partners | Teekay Lng [Member]
Capital Unit [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest		98.20%
Parent Company [Member] | Teekay Lng [Member]
Capital Unit [Line Items]
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	1.80%	1.80%

Total Capital and Net Income _4

Total Capital and Net Income Per Unit Net Income (Loss) Per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Class of Stock [Line Items]
Limited partners’ interest in net income (loss)	$ 46,040	$ 37,796	$ 125,780	$ (834)
Weighted average number of common units	86,970,999	82,197,665	86,963,374	79,629,623
Dilutive effect of unit-based compensation	162,147	64,570	149,142	0
Weighted average number of common units and common unit equivalents (in units)	87,133,146	82,262,235	87,112,516	79,629,623
Basic (usd per unit)	$ 0.53	$ 0.46	$ 1.45	$ (0.01)
Diluted (usd per unit)	$ 0.53	$ 0.46	$ 1.44	$ (0.01)
Limited Partners | Preferred Units
Class of Stock [Line Items]
Dividends, Preferred Stock, Cash	$ 6,400	$ 6,400	$ 12,900	$ 12,900

Total Capital and Net Income _5

Total Capital and Net Income Per Unit Common Unit Repurchases (Details) - USD ($)	3 Months Ended		6 Months Ended	31 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Jun. 30, 2021
Accelerated Share Repurchases [Line Items]
Partners' Capital Account, Treasury Units, Purchased		$ 15,635,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 55,800,000
Repurchase Agreements [Member] | Common Units
Accelerated Share Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount				$ 100,000,000
Partners' Capital Account, Units, Treasury Units Purchased			1,400,000
General Partner
Accelerated Share Repurchases [Line Items]
Partners' Capital Account, Treasury Units, Purchased		$ 313,000
General Partner | Repurchase Agreements [Member] | Common Units
Accelerated Share Repurchases [Line Items]
Partners' Capital Account, Treasury Units, Purchased			$ 300,000
Limited Partners | Common Units
Accelerated Share Repurchases [Line Items]
Partners' Capital Account, Units, Treasury Units Purchased	10,750,000	(1,373,000)
Partners' Capital Account, Treasury Units, Purchased		$ 15,322,000
Limited Partners | Repurchase Agreements [Member] | Common Units
Accelerated Share Repurchases [Line Items]
Partners' Capital Account, Units, Treasury Units Purchased				3,600,000
Partners' Capital Account, Treasury Units, Purchased			$ 15,300,000	$ 44,200,000

Write-down of Vessels Write-Dow

Write-down of Vessels Write-Down of Vessels (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020vessel	Mar. 31, 2020vessel
Property, Plant and Equipment [Line Items]
Asset Impairment Charges	$ 0	$ 0	$ 0	$ 45,000
Asset Impairment Charges	$ 0	$ 0	$ 0	45,000
Write-down and Sale of Vessels			Write-down of Vessels In March 2020, the carrying values for six of the Partnership's seven wholly-owned multi-gas carriers (the Unikum Spirit , Vision Spirit , Pan Spirit, Cathinka Spirit , Camilla Spirit and Sonoma Spirit ), were written down to their estimated fair values at that time, using appraised values, primarily due to the lower near-term outlook for these types of vessels partly as a result of the economic environment at that time (including the economic impact of the COVID-19 global pandemic), as well as the Partnership receiving notification that the Partnership's then-existing commercial management agreement with a third-party commercial manager would be terminated and replaced by a new commercial management agreement in September 2020. The total impairment charge of $45.0 million was included in write-down of vessels for the six months ended June 30, 2020 in the Partnership's consolidated statements of income.
LPG Carriers [Member]
Property, Plant and Equipment [Line Items]
Number Of Vessels | vessel					7
LPG Carriers [Member]
Property, Plant and Equipment [Line Items]
Number Of Vessels | vessel						6
Asset Impairment Charges				45,000
Asset Impairment Charges				$ 45,000

Uncategorized Items - tgp-20210

Label	Element	Value
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings (Accumulated Deficit)	us-gaap_RetainedEarningsAccumulatedDeficit	$ (53,300,000)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Limited Partner [Member]
Retained Earnings (Accumulated Deficit)	us-gaap_RetainedEarningsAccumulatedDeficit	(49,810,000)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | General Partner [Member]
Retained Earnings (Accumulated Deficit)	us-gaap_RetainedEarningsAccumulatedDeficit	(1,016,000)
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Noncontrolling Interest [Member]
Retained Earnings (Accumulated Deficit)	us-gaap_RetainedEarningsAccumulatedDeficit	$ (2,474,000)