Derivative Instruments - Gross amounts of derivative fair values contained in the consolidated balance sheet (Details) - USD ($) $ in Thousands |
Jun. 30, 2016 |
Dec. 31, 2015 |
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Derivatives, Fair Value [Line Items] | |||||||||||
Gross amounts recognized in balance sheet | [1] | $ 81,809 | $ 89,314 | ||||||||
Gross amounts recognized in balance sheet | [1] | 51,994 | 45,495 | ||||||||
Collateral and counterparty netting, assets | [1],[2] | (2,674) | (3,087) | ||||||||
Collateral and counterparty nettings, liabilities | [1],[2] | (2,674) | (3,087) | ||||||||
Asset derivative fair value | [1],[3] | 79,135 | 86,227 | ||||||||
Liability derivative fair value | [1],[3] | 49,320 | 42,408 | ||||||||
Gross amounts not offset in the balance sheet - cash collateral | [1] | (49,230) | (30,958) | ||||||||
Derivative, Collateral, Right to Reclaim Cash | [1] | (6,570) | 0 | ||||||||
Derivative Asset | [1] | 29,905 | 55,269 | ||||||||
Derivative Liability | [1] | 42,750 | 42,408 | ||||||||
Derivatives designated as hedging instruments | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 2,069,619 | 1,667,585 | |||||||||
Gross amounts recognized in balance sheet | [1] | 52,651 | 64,289 | ||||||||
Liability derivative notional amount | 350,908 | 674,976 | |||||||||
Gross amounts recognized in balance sheet | [1] | 9,339 | 11,941 | ||||||||
Derivatives designated as hedging instruments | Foreign exchange contracts | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 2,069,619 | 1,667,585 | |||||||||
Gross amounts recognized in balance sheet | [1] | 52,651 | 64,289 | ||||||||
Liability derivative notional amount | 350,908 | 674,976 | |||||||||
Gross amounts recognized in balance sheet | [1] | 9,339 | 11,941 | ||||||||
Derivatives not designated as hedging instruments | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 264,305 | 441,843 | |||||||||
Gross amounts recognized in balance sheet | [1] | 29,158 | 25,025 | ||||||||
Liability derivative notional amount | 4,871,119 | 4,909,732 | |||||||||
Gross amounts recognized in balance sheet | [1] | 42,655 | 33,554 | ||||||||
Derivatives not designated as hedging instruments | Investment related derivatives | Interest rate contracts | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 0 | 0 | |||||||||
Gross amounts recognized in balance sheet | 0 | 0 | |||||||||
Liability derivative notional amount | 0 | 0 | |||||||||
Gross amounts recognized in balance sheet | 0 | 0 | |||||||||
Derivatives not designated as hedging instruments | Investment related derivatives | Foreign exchange contracts | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 46,308 | 102,234 | |||||||||
Gross amounts recognized in balance sheet | [1] | 2,296 | 2,888 | ||||||||
Liability derivative notional amount | 199,105 | 144,707 | |||||||||
Gross amounts recognized in balance sheet | [1] | 8,778 | 1,702 | ||||||||
Derivatives not designated as hedging instruments | Investment related derivatives | Credit exposure | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 5,000 | 8,433 | |||||||||
Gross amounts recognized in balance sheet | [1] | 365 | 652 | ||||||||
Liability derivative notional amount | 70,682 | 71,614 | |||||||||
Gross amounts recognized in balance sheet | [1] | 11,394 | 12,067 | ||||||||
Derivatives not designated as hedging instruments | Investment related derivatives | Financial market exposure | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 5 | 37 | |||||||||
Gross amounts recognized in balance sheet | [1] | 5 | 77 | ||||||||
Liability derivative notional amount | 30,117 | 26,500 | |||||||||
Gross amounts recognized in balance sheet | [1] | 2,870 | 417 | ||||||||
Derivatives not designated as hedging instruments | Other non-investment derivatives | Foreign exchange contracts | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 106,402 | 194,566 | |||||||||
Gross amounts recognized in balance sheet | [1] | 6,892 | 2,009 | ||||||||
Liability derivative notional amount | 0 | 0 | |||||||||
Gross amounts recognized in balance sheet | [1] | 0 | 0 | ||||||||
Derivatives not designated as hedging instruments | Other non-investment derivatives | Other credit derivatives | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 0 | 29,874 | |||||||||
Gross amounts recognized in balance sheet | [1] | 0 | 31 | ||||||||
Liability derivative notional amount | 30,669 | 0 | |||||||||
Gross amounts recognized in balance sheet | [1] | 13 | 0 | ||||||||
Derivatives not designated as hedging instruments | Other non-investment derivatives | Guaranteed minimum income benefit contract | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | 46,662 | 46,032 | |||||||||
Gross amounts recognized in balance sheet | [1] | 19,600 | 19,368 | ||||||||
Liability derivative notional amount | 46,662 | 46,032 | |||||||||
Gross amounts recognized in balance sheet | [1] | 19,600 | 19,368 | ||||||||
Derivatives not designated as hedging instruments | Other non-investment derivatives | Modified coinsurance funds withheld contract | |||||||||||
Derivatives, Fair Value [Line Items] | |||||||||||
Asset derivative notional amount | [4] | 59,928 | 60,667 | ||||||||
Gross amounts recognized in balance sheet | [1],[4] | 0 | 0 | ||||||||
Liability derivative notional amount | [4] | 4,493,884 | 4,620,879 | ||||||||
Gross amounts recognized in balance sheet | [1],[4] | $ 0 | $ 0 | ||||||||
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