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Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Interest rate swap agreements
Fair value of cross currency swap agreement	$ (144,463)
United states dollar-denominated interest rate swaps 1 [Member]
Interest rate swap agreements
Interest Rate Index	LIBOR
Principal Amount	423,748
Fair value of cross currency swap agreement	(119,895)
Weighted-Average Remaining Term (Years)	25.1
Fixed Interest Rate (%)	4.90%
United states dollar denominated interest rate swaps 2 [Member]
Interest rate swap agreements
Interest Rate Index	LIBOR
Principal Amount	209,812
Fair value of cross currency swap agreement	(60,441)
Weighted-Average Remaining Term (Years)	7.2
Fixed Interest Rate (%)	6.20%
United states dollar denominated interest rate swaps 3 [Member]
Interest rate swap agreements
Interest Rate Index	LIBOR
Principal Amount	90,000
Fair value of cross currency swap agreement	(18,183)
Weighted-Average Remaining Term (Years)	6.7
Fixed Interest Rate (%)	4.90%
United states dollar denominated interest rate swaps 4 [Member]
Interest rate swap agreements
Interest Rate Index	LIBOR
Principal Amount	100,000
Fair value of cross currency swap agreement	(21,755)
Weighted-Average Remaining Term (Years)	5.0
Fixed Interest Rate (%)	5.30%
United states dollar denominated interest rate swaps 5 [Member]
Interest rate swap agreements
Interest Rate Index	LIBOR
Principal Amount	218,750
Fair value of cross currency swap agreement	(57,996)
Weighted-Average Remaining Term (Years)	17.0
Fixed Interest Rate (%)	5.20%
United states dollar denominated interest rate swaps 6 [Member]
Interest rate swap agreements
Interest Rate Index	LIBOR
Principal Amount	470,199
Fair value of cross currency swap agreement	159,603
Weighted-Average Remaining Term (Years)	25.1
Fixed Interest Rate (%)	4.80%
Euro denominated interest rate swaps [Member]
Interest rate swap agreements
Interest Rate Index	EURIBOR
Principal Amount	348,905
Fair value of cross currency swap agreement	$ (25,796)
Weighted-Average Remaining Term (Years)	12.5
Fixed Interest Rate (%)	3.10%

X

- Definition

Monetary amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

+ Details

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Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Interest rate index

+ References

No definition available.

+ Details

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Namespace Prefix:	tgp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The average time remaining until maturity on the group of derivatives identified.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	us-types:durationStringItemType
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X

- Definition

Fair value as of the balance sheet date of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13495-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

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X

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Details

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