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Derivative Instruments (Details 8) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
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Credit Exposure of Derivative Contracts |  |  |  |
Estimated fair value of derivatives in net asset (liability) position | $ 105,672 |  | $ 136,558 |
Cash provided as collateral | 6,950 | [1] | 27,867 | [1]
Securities provided as collateral | 2,722 | [2] | 1,565 | [2]
Cash received as collateral | (89,829) | [3] | (136,414) | [3]
Securities received as collateral | (17,010) | [4] | (22,458) | [4]
Net credit exposure | 8,505 |  | 7,118 |
Margin account related to exchange-traded futures | $ 5,251 | [5] | $ 5,605 | [5]
[1] | Consists of receivable from counterparty, included in other assets.
[2] | Included in other invested assets, primarily consists of U.S. Treasury securities.
[3] | Included in cash and cash equivalents, with obligation to return cash collateral recorded in other liabilities.
[4] | Consists of U.S. Treasury securities.
[5] | Included in cash and cash equivalents.

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- Details
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- Definition The aggregate estimated fair value asset (liability) of derivative instruments that are subject to or not subject to credit-contingent provisions at the end of the reporting period. + References No definition available. + Details
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- Definition The aggregate cash amounts of collateral provided for derivative instruments that are subject to or not subject to credit-contingent provisions that are in a net liability position at the end of the reporting period. The estimated fair value amounts are included in cash. + References No definition available. + Details
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- Definition The aggregate estimated fair value amounts of collateral provided for derivative instruments that are subject to or not subject to credit-contingent provisions that are in a net liability position at the end of the reporting period. The estimated fair value amounts are included in other invested assets. + References No definition available. + Details
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- Definition The aggregate cash amounts of collateral provided for derivative instruments that are subject to or not subject to credit-contingent provisions that are in a net asset position at the end of the reporting period. The estimated fair value amounts are included in cash. + References No definition available. + Details
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- Definition The aggregate estimated fair value amounts of collateral provided for derivative instruments that are subject to or not subject to credit-contingent provisions that are in a net asset position at the end of the reporting period. The estimated fair value amounts are included in fixed maturity securities. + References No definition available. + Details
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- Definition Represents the entity's margin account related to exchange-traded futures. + References No definition available. + Details
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- Definition Represents the entity's net credit exposure related to derivative contracts. + References No definition available. + Details
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