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Investments (Narrative) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) securities | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) securities | Sep. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) securities
Investment Narrative [Line Items] |  |  |  |  |
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash | $ 38,500 |  | $ 38,500 |  | $ 28,800
Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements | 7,900 |  | 7,900 |  | $ 5,500
Proceeds From Sale Of Available For Sale Securities Sold At Loss | 484,700 | $ 317,300 | 1,771,400 | $ 903,100 |
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments | $ 7,678 | $ 9,054 | $ 30,712 | $ 43,397 |
Policy Loans Percent Of Total Investments | 2.70% |  | 2.70% |  | 3.20%
Mortgage Loan Percent Of Cash And Invested Assets | 8.70% |  | 8.70% |  | 8.40%
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities | 1,165 |  | 1,165 |  | 1,535
Securities As Percentage Of Consolidated Stockholder Equity | 10.00% |  | 10.00% |  |
Securities Borrowed Or Pledged, Minimum Fair Value Percentage |  |  | 100.00% |  |
Collateral Obtained Percent Of Fair Value Reverse Repurchase Agreements |  |  | 100.00% |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 100.00% |  | 100.00% |  | 100.00%
Funds Withheld At Interest Percent Of Total Investments | 12.10% |  | 12.10% |  | 13.10%
Funds withheld at interest | $ 6,020,336 |  | $ 6,020,336 |  | $ 5,875,919
Funds Held Under Reinsurance Agreements Asset Specific Client | $ 4,000,000 |  | $ 4,000,000 |  |
Other Invested Assets Percent Of Cash And Invested Assets | 3.10% |  | 3.10% |  | 3.60%
CALIFORNIA |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 21.20% |  | 21.20% |  | 22.10%

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