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Investments (Net Realized Gains (Losses) on Invesments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Gain (Loss) on Securities [Line Items] |  |  |  |  |
Credit losses (1) |  | $ (25,923) |  | $ (82,335) |
Increase (decrease) in allowance for credit losses |  | 810 |  | (3,697) |
Recovery of specific allowance |  | 0 |  | 712 |
Net realized gains (losses) on investments |  | (22,321) | $ 4,328 | (68,545) | $ (67)
Net OTTI losses recognized in operations |  | 0 | (101) | 0 | (1,314)
Available For Sale Fixed Maturity Securities |  |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |  |
Gross realized gains |  | 2,843 | 6,164 | 18,296 | 12,590
Gross realized losses |  | (51) | (1,586) | (1,521) | (5,667)
Credit losses (1) | [1] | (25,923) | 0 | (82,335) | 0
Realized gains (losses) |  | (23,131) | 4,578 | (65,560) | 6,923
Other Investments |  |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |  |
Gross realized gains |  | 0 | 0 | 0 | 7,296
Gross realized losses |  | 0 | 0 | 0 | (14,446)
Realized gains (losses) |  | 0 | 0 | 0 | (7,150)
Mortgage Loans on Real Estate |  |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |  |
Increase (decrease) in allowance for credit losses |  | 810 | (250) | (3,697) | 160
Recovery of specific allowance |  | 0 | 0 | 712 | 0
Change in allowance for credit losses and recoveries |  | $ 810 | $ (250) | $ (2,985) | $ 160
[1] | (1) Prior to adopting authoritative guidance effective January 1, 2020, credit losses on available for sale fixed maturity securities were classified as other than temporary impairments and reported in a separate line item in the Consolidated statements of operations. We recognized $0.1 million and $1.3 million, respectively, of other than temporary impairments during the three and nine months ended September 30, 2019.

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