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RESERVES FOR LOSSES AND LOSS SETTLEMENT EXPENSES - Incurred Claims and Allocated Claim Adjustment Expenses (Details) claim in Thousands, $ in Thousands | Dec. 31, 2025 USD ($) claim | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
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Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 1,929,135 |  |  |  |  |  |  |  |  |
Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance |  | $ 1,514,873 |  |  |  |  |  |  |  |
Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | 1,903,132 |  |  |  |  |  |  |  |  |
Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | 418,098 |  |  |  |  |  |  |  |  |
Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | 332,584 |  |  |  |  |  |  |  |  |
2016 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | 171,819 | 164,989 | $ 159,284 | $ 153,490 | $ 148,324 | $ 140,784 | $ 142,397 | $ 136,275 | $ 130,041 | $ 139,144
Total of incurred but not reported liabilities plus expected development on reported claims | 9,488 |  |  |  |  |  |  |  |  |
Cumulative development | $ 32,675 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 8,613 |  |  |  |  |  |  |  |  |
2016 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 142,574 | 142,814 | 142,644 | 145,351 | 144,109 | 143,108 | 143,724 | 143,721 | 144,208 | 147,473
Total of incurred but not reported liabilities plus expected development on reported claims | 336 |  |  |  |  |  |  |  |  |
Cumulative development | $ (4,899) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 7,604 |  |  |  |  |  |  |  |  |
2016 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 173,760 | 173,858 | 175,387 | 175,016 | 174,588 | 173,823 | 175,658 | 174,337 | 175,357 | 174,018
Total of incurred but not reported liabilities plus expected development on reported claims | 72 |  |  |  |  |  |  |  |  |
Cumulative development | $ (258) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 20,092 |  |  |  |  |  |  |  |  |
2016 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 53,430 | 53,574 | 53,617 | 53,090 | 52,870 | 53,964 | 55,168 | 61,648 | 66,575 | 70,419
Total of incurred but not reported liabilities plus expected development on reported claims | 955 |  |  |  |  |  |  |  |  |
Cumulative development | $ (16,989) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 5,696 |  |  |  |  |  |  |  |  |
2016 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 45,180 | 45,185 | 45,179 | 45,199 | 45,297 | 45,113 | 45,961 | 45,379 | 45,840 | $ 48,072
Total of incurred but not reported liabilities plus expected development on reported claims | 21 |  |  |  |  |  |  |  |  |
Cumulative development | $ (2,892) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 9,553 |  |  |  |  |  |  |  |  |
2017 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 183,879 | 176,073 | 174,013 | 173,091 | 159,653 | 156,369 | 152,547 | 139,032 | 139,602 |
Total of incurred but not reported liabilities plus expected development on reported claims | 14,517 |  |  |  |  |  |  |  |  |
Cumulative development | $ 44,277 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 10,270 |  |  |  |  |  |  |  |  |
2017 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 161,091 | 161,051 | 161,611 | 161,456 | 161,232 | 161,693 | 160,945 | 160,240 | 155,139 |
Total of incurred but not reported liabilities plus expected development on reported claims | 533 |  |  |  |  |  |  |  |  |
Cumulative development | $ 5,952 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 9,889 |  |  |  |  |  |  |  |  |
2017 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 230,174 | 231,093 | 234,229 | 233,535 | 233,007 | 233,159 | 235,110 | 224,553 | 227,919 |
Total of incurred but not reported liabilities plus expected development on reported claims | 245 |  |  |  |  |  |  |  |  |
Cumulative development | $ 2,255 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 27,325 |  |  |  |  |  |  |  |  |
2017 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 47,709 | 47,943 | 48,074 | 47,801 | 49,362 | 51,874 | 55,982 | 69,528 | 76,184 |
Total of incurred but not reported liabilities plus expected development on reported claims | 1,164 |  |  |  |  |  |  |  |  |
Cumulative development | $ (28,475) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 7,988 |  |  |  |  |  |  |  |  |
2017 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 58,626 | 58,788 | 58,863 | 58,790 | 59,023 | 58,544 | 58,695 | 59,342 | $ 60,330 |
Total of incurred but not reported liabilities plus expected development on reported claims | 29 |  |  |  |  |  |  |  |  |
Cumulative development | $ (1,704) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 11,906 |  |  |  |  |  |  |  |  |
2018 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 221,615 | 213,536 | 207,501 | 197,696 | 187,841 | 176,496 | 172,894 | 163,059 |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 18,694 |  |  |  |  |  |  |  |  |
Cumulative development | $ 58,556 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 9,588 |  |  |  |  |  |  |  |  |
2018 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 146,947 | 147,085 | 147,058 | 147,356 | 146,010 | 146,378 | 146,950 | 143,280 |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 679 |  |  |  |  |  |  |  |  |
Cumulative development | $ 3,667 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 13,548 |  |  |  |  |  |  |  |  |
2018 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 251,687 | 252,642 | 255,198 | 255,409 | 255,017 | 253,045 | 245,173 | 236,629 |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 542 |  |  |  |  |  |  |  |  |
Cumulative development | $ 15,058 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 32,919 |  |  |  |  |  |  |  |  |
2018 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 53,818 | 54,238 | 54,783 | 53,813 | 56,109 | 59,192 | 67,883 | 71,972 |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 987 |  |  |  |  |  |  |  |  |
Cumulative development | $ (18,154) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 8,250 |  |  |  |  |  |  |  |  |
2018 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 51,150 | 51,216 | 51,115 | 51,457 | 52,062 | 52,715 | 51,721 | $ 51,639 |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 45 |  |  |  |  |  |  |  |  |
Cumulative development | $ (489) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 14,721 |  |  |  |  |  |  |  |  |
2019 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 193,998 | 187,539 | 186,205 | 179,667 | 183,918 | 169,344 | 149,173 |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 21,822 |  |  |  |  |  |  |  |  |
Cumulative development | $ 44,825 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 9,194 |  |  |  |  |  |  |  |  |
2019 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 155,306 | 155,114 | 155,850 | 157,667 | 158,475 | 155,482 | 164,030 |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 743 |  |  |  |  |  |  |  |  |
Cumulative development | $ (8,724) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 10,821 |  |  |  |  |  |  |  |  |
2019 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 273,186 | 276,095 | 282,680 | 282,155 | 289,929 | 291,139 | 279,229 |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 427 |  |  |  |  |  |  |  |  |
Cumulative development | $ (6,043) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 34,526 |  |  |  |  |  |  |  |  |
2019 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 50,749 | 49,807 | 49,084 | 48,945 | 49,336 | 49,189 | 52,136 |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 127 |  |  |  |  |  |  |  |  |
Cumulative development | $ (1,387) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 8,109 |  |  |  |  |  |  |  |  |
2019 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 57,628 | 57,559 | 57,630 | 57,929 | 58,745 | 58,378 | $ 59,548 |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | (392) |  |  |  |  |  |  |  |  |
Cumulative development | $ (1,920) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 13,706 |  |  |  |  |  |  |  |  |
2020 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 183,575 | 181,687 | 179,080 | 162,471 | 158,022 | 171,013 |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 32,978 |  |  |  |  |  |  |  |  |
Cumulative development | $ 12,562 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 8,608 |  |  |  |  |  |  |  |  |
2020 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 209,344 | 209,588 | 207,256 | 202,929 | 201,391 | 207,207 |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 1,079 |  |  |  |  |  |  |  |  |
Cumulative development | $ 2,137 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 11,266 |  |  |  |  |  |  |  |  |
2020 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 187,245 | 188,556 | 194,162 | 196,412 | 216,951 | 243,360 |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 702 |  |  |  |  |  |  |  |  |
Cumulative development | $ (56,115) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 34,792 |  |  |  |  |  |  |  |  |
2020 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 45,598 | 45,524 | 46,624 | 43,724 | 46,612 | 45,365 |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | (506) |  |  |  |  |  |  |  |  |
Cumulative development | $ 233 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 7,453 |  |  |  |  |  |  |  |  |
2020 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 71,770 | 72,174 | 72,531 | 73,204 | 73,761 | $ 81,206 |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 326 |  |  |  |  |  |  |  |  |
Cumulative development | $ (9,436) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 13,614 |  |  |  |  |  |  |  |  |
2021 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 175,956 | 176,770 | 162,879 | 162,359 | 145,822 |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 43,852 |  |  |  |  |  |  |  |  |
Cumulative development | $ 30,134 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 6,492 |  |  |  |  |  |  |  |  |
2021 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 158,798 | 157,534 | 157,905 | 169,669 | 156,794 |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | (18,686) |  |  |  |  |  |  |  |  |
Cumulative development | $ 2,004 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 14,678 |  |  |  |  |  |  |  |  |
2021 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 165,608 | 169,172 | 173,708 | 172,599 | 179,880 |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 512 |  |  |  |  |  |  |  |  |
Cumulative development | $ (14,272) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 24,254 |  |  |  |  |  |  |  |  |
2021 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 40,390 | 40,287 | 39,649 | 42,283 | 45,177 |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 132 |  |  |  |  |  |  |  |  |
Cumulative development | $ (4,787) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 4,599 |  |  |  |  |  |  |  |  |
2021 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 26,184 | 26,338 | 26,372 | 26,489 | $ 28,537 |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 130 |  |  |  |  |  |  |  |  |
Cumulative development | $ (2,353) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 17,128 |  |  |  |  |  |  |  |  |
2022 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 189,588 | 181,924 | 175,579 | 161,826 |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 42,104 |  |  |  |  |  |  |  |  |
Cumulative development | $ 27,762 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 3,590 |  |  |  |  |  |  |  |  |
2022 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 173,023 | 171,958 | 170,594 | 161,776 |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 8,832 |  |  |  |  |  |  |  |  |
Cumulative development | $ 11,247 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 5,397 |  |  |  |  |  |  |  |  |
2022 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 155,585 | 160,303 | 161,672 | 157,165 |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 5,790 |  |  |  |  |  |  |  |  |
Cumulative development | $ (1,580) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 12,435 |  |  |  |  |  |  |  |  |
2022 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 27,743 | 27,398 | 26,721 | 29,597 |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 1,379 |  |  |  |  |  |  |  |  |
Cumulative development | $ (1,854) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 1,916 |  |  |  |  |  |  |  |  |
2022 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 3,056 | 3,127 | 2,287 | $ 1,493 |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 125 |  |  |  |  |  |  |  |  |
Cumulative development | $ 1,563 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 2,588 |  |  |  |  |  |  |  |  |
2023 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 178,568 | 173,529 | 172,398 |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 65,882 |  |  |  |  |  |  |  |  |
Cumulative development | $ 6,170 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 3,209 |  |  |  |  |  |  |  |  |
2023 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 146,384 | 147,904 | 164,526 |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 11,545 |  |  |  |  |  |  |  |  |
Cumulative development | $ (18,142) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 4,457 |  |  |  |  |  |  |  |  |
2023 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 145,295 | 146,433 | 153,502 |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 9,688 |  |  |  |  |  |  |  |  |
Cumulative development | $ (8,207) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 10,472 |  |  |  |  |  |  |  |  |
2023 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 26,389 | 28,742 | 29,262 |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 1,588 |  |  |  |  |  |  |  |  |
Cumulative development | $ (2,873) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 1,508 |  |  |  |  |  |  |  |  |
2023 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 2,367 | 2,374 | $ 2,391 |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | (2,842) |  |  |  |  |  |  |  |  |
Cumulative development | $ (24) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 63 |  |  |  |  |  |  |  |  |
2024 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 202,111 | 215,235 |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 126,954 |  |  |  |  |  |  |  |  |
Cumulative development | $ (13,124) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 2,588 |  |  |  |  |  |  |  |  |
2024 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 109,389 | 124,467 |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 22,029 |  |  |  |  |  |  |  |  |
Cumulative development | $ (15,078) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 4,115 |  |  |  |  |  |  |  |  |
2024 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 147,877 | 156,028 |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 22,743 |  |  |  |  |  |  |  |  |
Cumulative development | $ (8,151) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 11,270 |  |  |  |  |  |  |  |  |
2024 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 31,328 | 32,202 |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 1,075 |  |  |  |  |  |  |  |  |
Cumulative development | $ (874) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 1,764 |  |  |  |  |  |  |  |  |
2024 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 5,423 | $ 8,648 |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | 1,282 |  |  |  |  |  |  |  |  |
Cumulative development | $ (3,225) |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 12 |  |  |  |  |  |  |  |  |
2025 | Commercial other liability |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 228,026 |  |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | $ 186,005 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 1,451 |  |  |  |  |  |  |  |  |
2025 | Commercial fire and allied |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 112,017 |  |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | $ 41,229 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 4,474 |  |  |  |  |  |  |  |  |
2025 | Commercial automobile |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 172,715 |  |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | $ 67,055 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 14,725 |  |  |  |  |  |  |  |  |
2025 | Commercial workers' compensation |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 40,944 |  |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | $ 6,816 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 2,431 |  |  |  |  |  |  |  |  |
2025 | Personal |  |  |  |  |  |  |  |  |  |
Liability for Claims and Claims Adjustment Expense [Line Items] |  |  |  |  |  |  |  |  |  |
Incurred losses and allocated loss settlement expenses, net of reinsurance | $ 11,200 |  |  |  |  |  |  |  |  |
Total of incurred but not reported liabilities plus expected development on reported claims | $ 7,844 |  |  |  |  |  |  |  |  |
Cumulative number of reported claims | claim | 4 |  |  |  |  |  |  |  |  |

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