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Investments - Security Holdings in an Unrealized Loss Position - Tabular Disclosure (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value |  |
Fair Value - Less Than 12 Months | $ 384,693 | $ 160,773
Fair Value - More Than 12 Months | 99,986 | 9,346
Fair Value - Total | 484,679 | 170,119
Unrealized Losses |  |
Unrealized Losses - Less Than 12 Months | (31,558) | (2,188)
Unrealized Losses - More Than 12 Months | (15,365) | (517)
Unrealized Losses - Total | (46,923) | (2,705)
U.S. Governments |  |
Fair Value |  |
Fair Value - Less Than 12 Months | 41,077 | 5,968
Fair Value - More Than 12 Months | 6,853 | 1,457
Fair Value - Total | 47,930 | 7,425
Unrealized Losses |  |
Unrealized Losses - Less Than 12 Months | (1,523) | (147)
Unrealized Losses - More Than 12 Months | (730) | (43)
Unrealized Losses - Total | (2,253) | (190)
States, territories, and possessions |  |
Fair Value |  |
Fair Value - Less Than 12 Months | 3,227 | 1,444
Fair Value - Total | 3,227 | 1,444
Unrealized Losses |  |
Unrealized Losses - Less Than 12 Months | (552) | (63)
Unrealized Losses - Total | (552) | (63)
Political subdivisions |  |
Fair Value |  |
Fair Value - Less Than 12 Months | 4,298 | 1,815
Fair Value - Total | 4,298 | 1,815
Unrealized Losses |  |
Unrealized Losses - Less Than 12 Months | (621) | (22)
Unrealized Losses - Total | (621) | (22)
Special revenue excluding mortgage/asset-backed securities |  |
Fair Value |  |
Fair Value - Less Than 12 Months | 25,091 | 6,280
Fair Value - More Than 12 Months | 5,080 |
Fair Value - Total | 30,171 | 6,280
Unrealized Losses |  |
Unrealized Losses - Less Than 12 Months | (3,287) | (76)
Unrealized Losses - More Than 12 Months | (1,200) |
Unrealized Losses - Total | (4,487) | (76)
Industrial and miscellaneous |  |
Fair Value |  |
Fair Value - Less Than 12 Months | 192,185 | 94,020
Fair Value - More Than 12 Months | 55,605 | 5,570
Fair Value - Total | 247,790 | 99,590
Unrealized Losses |  |
Unrealized Losses - Less Than 12 Months | (15,667) | (1,468)
Unrealized Losses - More Than 12 Months | (8,481) | (423)
Unrealized Losses - Total | (24,148) | (1,891)
Mortgage/asset-backed securities |  |
Fair Value |  |
Fair Value - Less Than 12 Months | 118,815 | 51,246
Fair Value - More Than 12 Months | 32,448 | 2,319
Fair Value - Total | 151,263 | 53,565
Unrealized Losses |  |
Unrealized Losses - Less Than 12 Months | (9,908) | (412)
Unrealized Losses - More Than 12 Months | (4,954) | (51)
Unrealized Losses - Total | $ (14,862) | $ (463)

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