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Investments (Investment Gains and Losses) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 1,362,404 | $ 1,343,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 10,621 | 129,896
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 136,021 | 3,034
Fixed maturity securities, available-for-sale | 1,237,004 | 1,470,617
US Treasury Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 9,471 | 9,515
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 458 | 1,097
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 7 | 1
Fixed maturity securities, available-for-sale | 9,922 | 10,611
US Government Agencies Debt Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 3,449 | 3,463
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 485 | 996
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Fixed maturity securities, available-for-sale | 3,934 | 4,459
US States and Political Subdivisions Debt Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 359,199 | 356,594
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 5,913 | 28,056
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 21,723 | 692
Fixed maturity securities, available-for-sale | 343,389 | 383,958
Corporate Debt Securities Financial Sector Member [Domain] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 229,937 | 213,652
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 675 | 22,477
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 29,961 | 172
Fixed maturity securities, available-for-sale | 200,651 | 235,957
Corporate Debt Security Consumer Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 238,842 | 219,223
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,781 | 23,658
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 31,996 | 900
Fixed maturity securities, available-for-sale | 208,627 | 241,981
Corporate Debt Security Utilities Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 110,093 | 105,738
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 191 | 7,358
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 17,654 | 801
Fixed maturity securities, available-for-sale | 92,630 | 112,295
Corporate Debt Security Energy Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 75,292 | 76,989
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 21 | 7,334
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 8,884 | 68
Fixed maturity securities, available-for-sale | 66,429 | 84,255
Corporate Debt Security All Other Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 187,706 | 196,403
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 869 | 22,497
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 22,150 | 380
Fixed maturity securities, available-for-sale | 166,425 | 218,520
Residential Mortgage Backed Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 111,950 | 117,755
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 197 | 16,046
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 2,133 | 6
Fixed maturity securities, available-for-sale | 110,014 | 133,795
Asset-backed Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 36,364 | 44,322
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 28 | 368
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 1,513 | 14
Fixed maturity securities, available-for-sale | 34,879 | 44,676
Foreign Government, Non-US [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 101 | 101
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3 | 9
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Fixed maturity securities, available-for-sale | $ 104 | $ 110

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