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v3.23.1

Investments (Unrealized Losses) (Details) $ in Thousands | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
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Debt Securities, Available-for-sale [Line Items] |  |
Debt security maturities rated investment grade, percent | 98.70% | 98.70%
US Treasury Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 514 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 2 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 66 | $ 64
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 8 | $ 9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 2 | 2
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 580 | $ 64
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 10 | $ 9
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 4 | 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 | $ 223
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 1 | $ 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 1 | 1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 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, Number of Positions | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 223 | $ 223
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 1 | $ 1
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 1 | 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 | $ 111,550 | $ 189,084
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 5,674 | $ 30,866
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 131 | 242
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 80,193 | $ 14,184
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 22,944 | $ 7,098
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 100 | 14
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 191,743 | $ 203,268
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 28,618 | $ 37,964
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 231 | 256
Corporate Debt Securities Financial Sector Member [Domain] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 102,783 | $ 182,447
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 9,440 | $ 39,122
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 119 | 237
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 89,543 | $ 6,144
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 26,679 | $ 3,261
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 130 | 16
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 192,326 | $ 188,591
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 36,119 | $ 42,383
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 249 | 253
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 | $ 81,680 | $ 164,224
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 5,352 | $ 34,823
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 90 | 220
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 108,995 | $ 23,417
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 33,162 | $ 12,315
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 153 | 30
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 190,675 | $ 187,641
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 38,514 | $ 47,138
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 243 | 250
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 | $ 30,814 | $ 73,483
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,271 | $ 15,959
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 55 | 152
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 61,557 | $ 16,413
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 17,933 | $ 7,831
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 104 | 18
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 92,371 | $ 89,896
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 20,204 | $ 23,790
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 159 | 170
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 | $ 36,270 | $ 59,053
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 2,270 | $ 9,601
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 41 | 75
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 26,992 | $ 5,617
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 6,570 | $ 1,794
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 37 | 8
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 63,262 | $ 64,670
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 8,840 | $ 11,395
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 78 | 83
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 | $ 93,285 | $ 140,955
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 6,463 | $ 25,337
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 99 | 171
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 57,461 | $ 7,910
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 16,093 | $ 3,711
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 80 | 15
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 150,746 | $ 148,865
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 22,556 | $ 29,048
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 179 | 186
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 | $ 168
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 3 | $ 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 2 | 2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 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, Number of Positions | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 168 | $ 168
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 3 | $ 2
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 2 | 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 | $ 101,277 | $ 98,758
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 7,354 | $ 10,514
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 87 | 95
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 1,296 | $ 759
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 332 | $ 251
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 12 | 5
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 102,573 | $ 99,517
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 7,686 | $ 10,765
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 99 | 100
Asset-backed Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 12,725 | $ 37,067
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 692 | $ 2,485
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 19 | 41
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 23,609 | $ 4,264
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 1,740 | $ 282
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 28 | 9
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 36,334 | $ 41,331
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 2,432 | $ 2,767
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 47 | 50
Debt Securities [Member] |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 571,289 | $ 945,462
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ 39,522 | $ 168,710
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions | 646 | 1,236
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | $ 449,712 | $ 78,772
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | $ 125,461 | $ 36,552
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions | 646 | 117
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 1,021,001 | $ 1,024,234
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 164,983 | $ 205,262
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | 1,292 | 1,353

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