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Investments (Narrative) (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) securities | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) securities
Investment Narrative [Line Items] |  |  |
Proceeds From Sale Of Available For Sale Securities Sold At Loss | $ 1,246,600 | $ 1,263,600 |
Sales of fixed maturity securities available-for-sale | 3,139,794 | 1,898,722 |
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Cash | 28,700 |  | $ 28,600
Net Amount Assets Liabilities From Repurchase Reverse Repurchase Agreements | 400 |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held | $ 3,700 |  |
Policy Loans Percent Of Total Investments | 2.30% |  | 2.50%
Mortgage Loan Percent Of Cash And Invested Assets |  |  | 9.10%
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments | $ 18,723 | 20,380 |
ProceedsFromSaleOfAvailableForSaleEquitySecuritiesSoldAtLoss |  | 28,400 |
Available-for-sale Equity Securities, Gross Unrealized Loss | 1 | 950 |
Available-for-sale Securities, Gross Realized Gains | $ 28,045 | 10,966 |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | securities | 1,585 |  | 3,109
Securities As Percentage Of Consolidated Stockholder Equity | 10.00% |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 100.00% |  | 100.00%
Funds Withheld At Interest Percent Of Total Investments | 10.20% |  | 10.60%
Funds withheld at interest | $ 5,729,838 |  | $ 5,761,471
Funds Held Under Reinsurance Agreements Asset Specific Client | 3,700,000 |  |
Gain (Loss) on Sale of Equity Investments | $ 3,744 | $ (4,137) |
Other Invested Assets Percent Of Invested Assets | 3.60% |  | 3.50%
CALIFORNIA |  |  |
Investment Narrative [Line Items] |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 17.70% |  |
TEXAS |  |  |
Investment Narrative [Line Items] |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 11.80% |  |
GEORGIA |  |  |
Investment Narrative [Line Items] |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 7.10% |  |
CANADA |  |  |
Investment Narrative [Line Items] |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 2.90% |  |
UNITED KINGDOM |  |  |
Investment Narrative [Line Items] |  |  |
Mortgage Loans On Real Estate Commercial And Consumer Net Percentage Of Total | 0.50% |  |

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