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Investments (Investment Gains and Losses) (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 1,403,782 | $ 1,401,301
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 8,731 | 5,401
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 170,242 | 185,741
Fixed maturity securities | 1,242,271 | 1,220,961
US Treasury Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 5,916 | 5,939
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 91 | 85
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 101 | 115
Fixed maturity securities | 5,906 | 5,909
US Government Agencies Debt Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 3,137 | 3,152
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 230 | 152
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 0 | 0
Fixed maturity securities | 3,367 | 3,304
US States and Political Subdivisions Debt Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 301,135 | 300,757
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,312 | 1,087
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 31,098 | 33,542
Fixed maturity securities | 271,349 | 268,302
Corporate Debt Securities Financial Sector Member [Domain] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 268,869 | 272,925
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 2,924 | 1,593
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 29,506 | 33,285
Fixed maturity securities | 242,287 | 241,233
Corporate Debt Security Consumer Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 260,529 | 263,242
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,394 | 899
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 42,932 | 45,955
Fixed maturity securities | 218,991 | 218,186
Corporate Debt Security Utilities Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 127,904 | 126,361
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 458 | 220
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 21,479 | 22,770
Fixed maturity securities | 106,883 | 103,811
Corporate Debt Security Energy Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 80,167 | 79,247
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 156 | 40
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 9,141 | 9,959
Fixed maturity securities | 71,182 | 69,328
Corporate Debt Security Communications Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 66,572 | 70,896
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 235 | 111
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 8,488 | 9,910
Fixed maturity securities | 58,319 | 61,097
Corporate Debt Security All Other Sector |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 130,035 | 117,387
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,032 | 315
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 16,951 | 16,368
Fixed maturity securities | 114,116 | 101,334
Commercial Mortgage Backed Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 310 | 315
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 4 | 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 3 | 5
Fixed maturity securities | 311 | 311
Residential Mortgage Backed Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 105,617 | 106,661
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 6 | 7
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 9,787 | 13,026
Fixed maturity securities | 95,836 | 93,642
Asset-backed Securities [Member] |  |
Gross Unrealized Gains and Losses [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 53,591 | 54,419
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 889 | 891
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 756 | 806
Fixed maturity securities | $ 53,724 | $ 54,504

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