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Investments Unrealized Losses Less Than and Greater Than 12 Months (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |
Credit valuation loss on fixed maturities AFS | $ 0 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 184,082,000 | 64,080,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 7,201,000 | $ 1,503,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 327 | 120
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 821,516,000 | $ 932,571,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 178,540,000 | $ 157,236,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 1,045 | 1,142
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 1,005,598,000 | $ 996,651,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 185,741,000 | $ 158,739,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 1,372 | 1,262
Debt security maturities rated investment grade, percent | 99.20% | 99.40%
US Treasury Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 835,000 | $ 1,203,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 51,000 | $ 40,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 3 | 5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 435,000 | $ 65,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 64,000 | $ 8,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 5 | 2
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 1,270,000 | $ 1,268,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 115,000 | $ 48,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 8 | 7
US Government Agencies Debt Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months |  | $ 221,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | $ 1,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions |  | 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer |  | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions |  | 0
Debt Securities, Available-for-sale, Unrealized Loss Position |  | $ 221,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss |  | $ 1,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions |  | 1
US States and Political Subdivisions Debt Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 42,583,000 | $ 19,540,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1,484,000 | $ 357,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 63 | 35
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 147,534,000 | $ 164,264,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 32,058,000 | $ 28,775,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 177 | 192
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 190,117,000 | $ 183,804,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 33,542,000 | $ 29,132,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 240 | 227
Corporate Debt Security Financial Sector |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 29,258,000 | $ 12,584,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 756,000 | $ 383,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 53 | 19
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 154,448,000 | $ 176,521,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 32,529,000 | $ 30,872,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 192 | 217
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 183,706,000 | $ 189,105,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 33,285,000 | $ 31,255,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 245 | 236
Corporate Debt Security Consumer Sector |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 37,231,000 | $ 10,175,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,053,000 | $ 265,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 57 | 16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 161,795,000 | $ 176,725,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 43,902,000 | $ 36,829,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 216 | 223
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 199,026,000 | $ 186,900,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 45,955,000 | $ 37,094,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 273 | 239
Corporate Debt Security Utilities Sector |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 16,750,000 | $ 3,596,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 687,000 | $ 66,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 47 | 20
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 79,488,000 | $ 85,169,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 22,083,000 | $ 20,187,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 142 | 137
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 96,238,000 | $ 88,765,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 22,770,000 | $ 20,253,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 189 | 157
Corporate Debt Security Energy Sector |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 11,654,000 | $ 3,291,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 438,000 | $ 57,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 29 | 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 52,537,000 | $ 59,392,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 9,521,000 | $ 7,992,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 65 | 76
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 64,191,000 | $ 62,683,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 9,959,000 | $ 8,049,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 94 | 77
Corporate Debt Security Communications Sector |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 9,973,000 | $ 5,784,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 250,000 | $ 153,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 11 | 5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 48,462,000 | $ 56,108,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 9,660,000 | $ 8,739,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 60 | 69
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 58,435,000 | $ 61,892,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 9,910,000 | $ 8,892,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 71 | 74
Corporate Debt Security All Other Sector |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 25,208,000 | $ 2,080,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1,237,000 | $ 32,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 38 | 5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 68,756,000 | $ 85,757,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 15,131,000 | $ 12,407,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 87 | 100
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 93,964,000 | $ 87,837,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 16,368,000 | $ 12,439,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 125 | 105
Commercial Mortgage Backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 100,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 0 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 1 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 89,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 5,000 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 1 |
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 189,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 5,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 2 |
Residential Mortgage Backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 160,000 | $ 849,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,000 | $ 38,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 11 | 5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 93,231,000 | $ 95,806,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 13,024,000 | $ 10,022,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 84 | 86
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 93,391,000 | $ 96,655,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 13,026,000 | $ 10,060,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 95 | 91
Asset-backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 10,330,000 | $ 4,757,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 243,000 | $ 111,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 14 | 8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 14,741,000 | $ 32,764,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 563,000 | $ 1,405,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 16 | 40
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 25,071,000 | $ 37,521,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 806,000 | $ 1,516,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 30 | 48

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479106/326-30-50-5 + Details
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