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Investments (Narrative) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) securities | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) securities | Jun. 30, 2016 USD ($) | Dec. 31, 2016 USD ($) securities
Investment Narrative [Line Items] |  |  |  |  |
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash | $ 47,900 |  | $ 47,900 |  | $ 28,800
Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements | 5,100 |  | 5,100 |  | $ 5,500
Proceeds From Sale Of Available For Sale Securities Sold At Loss | 710,500 | $ 343,300 | 1,286,700 | $ 585,800 |
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments | $ 10,471 | $ 22,556 | $ 23,034 | $ 34,343 |
Policy Loans Percent Of Total Investments | 2.80% |  | 2.80% |  | 3.20%
Mortgage Loan Percent Of Cash And Invested Assets | 8.30% |  | 8.30% |  | 8.40%
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities | 1,134 |  | 1,134 |  | 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 | $ 5,968,856 |  | $ 5,968,856 |  | $ 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 | 3.00% |  | 3.00% |  | 3.60%
CALIFORNIA |  |  |  |  |
Investment Narrative [Line Items] |  |  |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 22.00% |  | 22.00% |  | 22.10%

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