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v3.25.1

Investments (Unrealized Losses) (Details) $ in Thousands | Mar. 31, 2025 USD ($) | Dec. 31, 2024 USD ($)
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Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt security maturities rated investment grade, percent | 99.20% | 99.20%
US Treasury Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 855 | $ 835
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 31 | $ 51
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 3 | 3
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 444 | $ 435
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 56 | $ 64
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 5 | 5
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 1,299 | $ 1,270
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 87 | $ 115
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 8 | 8
US States and Political Subdivisions Debt Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 29,060 | $ 42,583
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 845 | $ 1,484
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 44 | 63
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 151,175 | $ 147,534
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 28,472 | $ 32,058
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 178 | 177
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 180,235 | $ 190,117
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 29,317 | $ 33,542
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 222 | 240
Corporate Debt Securities Financial Sector Member [Domain] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 25,801 | $ 29,258
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 480 | $ 756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 36 | 53
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 150,873 | $ 154,448
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 29,729 | $ 32,529
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 189 | 192
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 176,674 | $ 183,706
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 30,209 | $ 33,285
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 225 | 245
Corporate Debt Security Consumer Sector |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 34,644 | $ 37,231
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1,452 | $ 2,053
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 43 | 57
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 164,681 | $ 161,795
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 41,629 | $ 43,902
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 217 | 216
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 199,325 | $ 199,026
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 43,081 | $ 45,955
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 260 | 273
Corporate Debt Security Utilities Sector |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 13,576 | $ 16,750
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 428 | $ 687
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 36 | 47
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 80,755 | $ 79,488
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 20,990 | $ 22,083
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 144 | 142
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 94,331 | $ 96,238
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 21,418 | $ 22,770
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 180 | 189
Corporate Debt Security Energy Sector |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 14,597 | $ 11,654
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 321 | $ 438
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 31 | 29
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 51,654 | $ 52,537
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 8,847 | $ 9,521
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 62 | 65
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 66,251 | $ 64,191
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 9,168 | $ 9,959
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 93 | 94
Corporate Debt Security Communications Sector |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 4,628 | $ 9,973
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 93 | $ 250
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 7 | 11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 49,759 | $ 48,462
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 8,737 | $ 9,660
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 61 | 60
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 54,387 | $ 58,435
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 8,830 | $ 9,910
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 68 | 71
Corporate Debt Security All Other Sector |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 25,067 | $ 25,208
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 840 | $ 1,237
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 36 | 38
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 72,295 | $ 68,756
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 15,475 | $ 15,131
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 90 | 87
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 97,362 | $ 93,964
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 16,315 | $ 16,368
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 126 | 125
Commercial Mortgage Backed Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 0 | $ 100
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 0 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 0 | 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 88 | $ 89
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 4 | $ 5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 1 | 1
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 88 | $ 189
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 4 | $ 5
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 1 | 2
Residential Mortgage Backed Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 81 | $ 160
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1 | $ 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 3 | 11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 96,077 | $ 93,231
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 10,136 | $ 13,024
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 84 | 84
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 96,158 | $ 93,391
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 10,137 | $ 13,026
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 87 | 95
Asset-backed Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 9,736 | $ 10,330
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 192 | $ 243
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 15 | 14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 14,602 | $ 14,741
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 536 | $ 563
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 16 | 16
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 24,338 | $ 25,071
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 728 | $ 806
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 31 | 30
Debt Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 158,045 | $ 184,082
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 4,683 | $ 7,201
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 254 | 327
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 832,403 | $ 821,516
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 164,611 | $ 178,540
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 1,047 | 1,045
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 990,448 | $ 1,005,598
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 169,294 | $ 185,741
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 1,301 | 1,372

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