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Investments - Sales of Fixed Maturities and Equity Securities (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2019
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Proceeds received | $ 805,887 | $ 625,527 | $ 500,760 |
Proceeds received | 29,863 | 25,498 | 50,113 |
Investment gain realized on transfer | 135,300 |  |  |
Reinsurance block of in-force fixed and variable annuity business | 2,900,000 |  |  | $ 2,900,000
Fixed maturity securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross gains realized | 150,852 | 10,536 | 13,570 |
Gross losses realized | (7,807) | (14,932) | (11,842) |
Equity securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Gross gains realized | 9,193 | 8,592 | 7,753 |
Gross losses realized | $ (788) | $ (917) | $ (1,972) |

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- Definition Proceeds From Sale And Maturity Of Marketable Securities (Excluding FHLB Repayments) + References No definition available. + Details
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