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Investments - Schedule of Unrealized Loss on Investments (Details) $ in Thousands | Mar. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($) security
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U.S. Government and Agency Securities |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 51 | 39
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 110 | $ 971
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 5,543 | $ 32,167
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 30 | 15
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 2,412 | $ 355
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 29,171 | $ 8,126
States, Municipalities and Political Subdivisions |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 93 | 63
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,661 | $ 761
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 41,910 | $ 41,670
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 12 | 8
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 1,403 | $ 320
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 13,767 | $ 11,423
Public Utilities |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 23 | 14
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 259 | $ 346
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 10,327 | $ 12,719
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 9 | 7
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 946 | $ 464
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 8,317 | $ 7,708
Corporate Securities |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 179 | 205
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 3,334 | $ 4,589
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 75,463 | $ 158,959
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 106 | 12
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 10,514 | $ 204
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 94,239 | $ 7,896
Mortgage-backed securities |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 159 | 138
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 3,243 | $ 2,638
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 76,578 | $ 111,636
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 71 | 37
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 7,592 | $ 1,559
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 73,074 | $ 41,786
Asset-backed Securities |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 121 | 111
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,273 | $ 493
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 61,396 | $ 60,566
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 4 | 2
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 164 | $ 30
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 2,749 | $ 1,596
Redeemable Preferred Stocks |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 24 | 1
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 46 | $ 2
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 2,949 | $ 90
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 1 | 1
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 10 | $ 9
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 89 | $ 91
Fixed Maturities |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 651 | 572
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 11,935 | $ 9,808
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 276,174 | $ 419,817
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 233 | 82
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 23,041 | $ 2,941
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 221,406 | $ 78,626
Foreign Government |  |
Twelve Months or More |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | security | 1 | 1
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 9 | $ 8
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 2,008 | $ 2,010
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | security | 0 | 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 0 | $ 0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 0 | $ 0

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