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Financial Instruments (Details Textual) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financial Instruments (Details) (Textual) [Abstract]
Average daily tanker rate over the remaining duration of the contract	$ 29,564	$ 29,498
Discount rate over the remaining duration of contract	8.91%	8.68%

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- Definition

Average daily tanker rate.

+ References

No definition available.

+ Details

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

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- Definition

Discount rate over the remaining duration of contract

+ References

No definition available.

+ Details

Name:	tgp_DiscountRateOverRemainingDurationOfContract
Namespace Prefix:	tgp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- Details

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