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Derivative Instruments and Hedging Activities (Details 4) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized gain (loss) net | $ (272,596) | $ (164,286) | $ (138,213)
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (70,126) | (135,312) | 278,259
Total realized and unrealized (losses) gains on non-designated derivative instruments | (342,722) | (299,598) | 140,046
Interest Rate Swap Agreements [Member] |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized gain (loss) net | (132,931) | (154,098) | (127,936)
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (58,405) | (146,780) | 258,710
Interest rate swap resets and terminations [Member] |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized gain (loss) net | (149,666) |  |
Foreign currency forward contracts [Member] |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized gain (loss) net | 9,965 | (2,274) | (8,984)
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | (11,399) | 6,307 | 14,797
Forward freight agreements, bunker fuel swap contracts and other [Member] |  |  |
Realized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments realized gain (loss) net | 36 | (7,914) | (1,293)
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net |  | (108) | 4,167
Foinaven embedded derivative [Member] |  |  |
Unrealized (losses) gains relating to: |  |  |
Derivative instruments not designated as hedging instruments unrealized gain (loss) net | $ (322) | $ 5,269 | $ 585

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- Definition Derivative instruments not designated as hedging instruments realized gain loss net. + References No definition available. + Details
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- Definition Derivative instruments not designated as hedging instruments unrealized gain loss net. + References No definition available. + Details
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- Definition Net gain (loss) from the increase (decrease) in fair value of derivative instrument not designated as hedging instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959 + Details
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