Derivative Instruments (Gain (Loss) Recognized In The Consolidated Statements Of Operations Related To Its Derivative Instruments) (Details) (USD $)
In Thousands, unless otherwise specified |
0 Months Ended | 12 Months Ended | |||||||||||
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Jan. 20, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | $ 13,330 | $ (55,884) | $ 56,022 | ||||||||||
Net investment income (loss) [Member] | Interest Rate Futures [Member]
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | (1,746) | (25,256) | (9,124) | ||||||||||
Net investment income (loss) [Member] | Credit Default Swap [Member]
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | 1,074 | (1,467) | 1,265 | ||||||||||
Net foreign exchange gains (losses) [Member] | Foreign Currency Forward Contracts, Underwriting and Non-investment Operations [Member]
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | 13,804 | [1] | (5,443) | [1] | 4,242 | [1] | |||||||
Net foreign exchange gains (losses) [Member] | Foreign Currency Forward Contracts, Investment Operations [Member]
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | (3,445) | [2] | (4,335) | [2] | 20,111 | [2] | |||||||
Net foreign exchange gains (losses) [Member] | Foreign Currency Forward Contracts, Energy And Risk Operations [Member]
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | (415) | [3] | 620 | [3] | 498 | [3] | |||||||
Other income (loss) [Member] | Energy And Weather Contracts [Member]
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | 4,058 | (22,978) | 28,976 | ||||||||||
Other income (loss) [Member] | Platinum Warrant [Member]
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Derivative Instruments, Gain (Loss) [Line Items] | |||||||||||||
Amount of gain (loss) recognized on derivatives | $ 3,000 | $ 0 | $ 2,975 | $ 10,054 | |||||||||
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