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Investments Unrealized Losses Less Than and Greater Than 12 Months (Details) $ in Thousands | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
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Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 945,462 | $ 110,267
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 168,710 | $ 2,423
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 1,236 | 115
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 78,772 | $ 8,832
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 36,552 | $ 611
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 117 | 7
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 1,024,234 | $ 119,099
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 205,262 | $ 3,034
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 1,353 | 122
Debt security maturities rated investment grade, percent | 98.70% | 98.00%
US Treasury Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 0 | $ 72
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 0 | $ 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 0 | 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 64 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 9 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 2 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 64 | $ 72
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 9 | $ 1
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 2 | 2
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 | $ 223 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1 |
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 | $ 223 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 1 |
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 | $ 189,084 | $ 21,715
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 30,866 | $ 692
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 242 | 15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 14,184 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 7,098 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 14 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 203,268 | $ 21,715
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 37,964 | $ 692
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 256 | 15
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 | $ 182,447 | $ 8,059
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 39,122 | $ 86
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 237 | 15
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 6,144 | $ 1,227
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 3,261 | $ 86
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 16 | 1
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 188,591 | $ 9,286
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 42,383 | $ 172
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 253 | 16
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 | $ 164,224 | $ 29,494
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 34,823 | $ 777
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 220 | 28
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 23,417 | $ 2,419
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 12,315 | $ 123
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 30 | 1
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 187,641 | $ 31,913
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 47,138 | $ 900
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 250 | 29
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 | $ 73,483 | $ 19,072
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 15,959 | $ 401
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 152 | 14
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 16,413 | $ 4,523
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 7,831 | $ 400
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 18 | 4
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 89,896 | $ 23,595
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 23,790 | $ 801
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 170 | 18
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 | $ 59,053 | $ 7,381
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 9,601 | $ 68
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 75 | 8
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 5,617 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 1,794 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 8 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 64,670 | $ 7,381
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 11,395 | $ 68
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 83 | 8
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 | $ 140,955 | $ 14,312
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 25,337 | $ 380
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 171 | 16
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 7,910 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 3,711 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 15 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 148,865 | $ 14,312
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 29,048 | $ 380
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 186 | 16
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 | $ 168 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2 |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 2 |
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 | $ 168 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 2 |
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 | $ 98,758 | $ 1,084
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 10,514 | $ 6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 95 | 6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 759 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 251 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 5 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 99,517 | $ 1,084
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 10,765 | $ 6
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 100 | 6
Asset-backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 37,067 | $ 9,078
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,485 | $ 12
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 41 | 11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 4,264 | $ 663
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 282 | $ 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 9 | 1
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 41,331 | $ 9,741
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 2,767 | $ 14
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 50 | 12

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