Financial Instruments and Other Inventory Positions Owned and Financial Instruments and Other Inventory Positions Sold, but Not Yet Purchased - Gross Fair Market Value of Derivative Instruments (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2012
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Derivative [Line Items] | ||||
Fair value of derivative assets, gross | $ 596,313 | [1] | ||
Fair value of derivative liabilities, gross | 574,982 | [1] | ||
Financial instruments and other inventory positions owned | Interest rate derivative contract
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Derivative [Line Items] | ||||
Fair value of derivative assets, gross | 593,627 | [1] | ||
Financial instruments and other inventory positions owned | Credit default swap index contract
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Derivative [Line Items] | ||||
Fair value of derivative assets, gross | 2,686 | [1] | ||
Financial instruments and other inventory positions sold, but not yet purchased | Interest rate derivative contract
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Derivative [Line Items] | ||||
Fair value of derivative liabilities, gross | 571,359 | [1] | ||
Financial instruments and other inventory positions sold, but not yet purchased | Credit default swap index contract
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Derivative [Line Items] | ||||
Fair value of derivative liabilities, gross | $ 3,623 | [1] | ||
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