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Reserve for Losses and Loss Adjustment Expenses - Incurred and Paid Accident Year Claims Development (Details) $ in Thousands | Dec. 31, 2022 USD ($) claim | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
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Homeowners' Insurance |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 41,819 |  |  |  |  |  |  |
Incurred but Not Reported Liabilities | $ 1,153 |  |  |  |  |  |  |
Cumulative Number of Claims | 18,524 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 39,041 |  |  |  |  |  |  |
Reserve for losses and loss adjustment expense, net of reinsurance | 2,778 |  |  |  |  |  |  |
Homeowners' Insurance | 2015 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,612 | $ 1,643 | $ 1,636 | $ 1,642 | $ 1,636 | $ 1,658 | $ 1,785 | $ 2,048
Cumulative Number of Claims | 567 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,612 | 1,643 | 1,636 | 1,634 | 1,615 | 1,523 | 1,379 | 860
Homeowners' Insurance | 2016 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,604 | 5,609 | 5,622 | 5,636 | 5,721 | 5,878 | 6,069 |
Cumulative Number of Claims | 1,357 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,604 | 5,609 | 5,619 | 5,607 | 5,585 | 5,356 | 4,120 |
Homeowners' Insurance | 2017 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 5,681 | 5,587 | 6,388 | 6,630 | 7,418 | 9,354 |  |
Incurred but Not Reported Liabilities | $ 11 |  |  |  |  |  |  |
Cumulative Number of Claims | 3,516 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,649 | 5,586 | 6,371 | 6,628 | 7,375 | 7,135 |  |
Homeowners' Insurance | 2018 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,529 | 1,929 | 1,930 | 2,008 | 2,193 |  |  |
Cumulative Number of Claims | 1,017 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,529 | 1,922 | 1,922 | 1,853 | 1,550 |  |  |
Homeowners' Insurance | 2019 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 676 | 807 | 838 | 914 |  |  |  |
Incurred but Not Reported Liabilities | $ 36 |  |  |  |  |  |  |
Cumulative Number of Claims | 1,386 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 704 | 685 | 685 | 546 |  |  |  |
Homeowners' Insurance | 2020 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 13,715 | 15,088 | 19,100 |  |  |  |  |
Incurred but Not Reported Liabilities | $ 106 |  |  |  |  |  |  |
Cumulative Number of Claims | 4,451 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 13,161 | 13,095 | 13,588 |  |  |  |  |
Homeowners' Insurance | 2021 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,765 | 8,453 |  |  |  |  |  |
Cumulative Number of Claims | 4,081 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,472 | 4,351 |  |  |  |  |  |
Homeowners' Insurance | 2022 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 7,237 |  |  |  |  |  |  |
Incurred but Not Reported Liabilities | $ 1,000 |  |  |  |  |  |  |
Cumulative Number of Claims | 2,149 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 5,310 |  |  |  |  |  |  |
Special Property |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 118,122 |  |  |  |  |  |  |
Incurred but Not Reported Liabilities | $ 13,598 |  |  |  |  |  |  |
Cumulative Number of Claims | 4,383 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 83,788 |  |  |  |  |  |  |
Reserve for losses and loss adjustment expense, net of reinsurance | 34,334 |  |  |  |  |  |  |
Special Property | 2015 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 692 | 673 | 677 | 678 | 671 | 671 | 719 | 630
Cumulative Number of Claims | claim | 6 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 692 | 673 | 673 | 666 | 626 | 586 | 438 | $ 265
Special Property | 2016 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,521 | 1,453 | 1,453 | 1,454 | 1,251 | 1,249 | 1,381 |
Cumulative Number of Claims | claim | 26 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 1,521 | 1,453 | 1,453 | 1,444 | 1,216 | 1,064 | $ 703 |
Special Property | 2017 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 4,987 | 4,974 | 4,264 | 4,014 | 3,475 | 3,071 |  |
Cumulative Number of Claims | claim | 110 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 4,987 | 4,974 | 4,269 | 4,011 | 3,344 | $ 1,967 |  |
Special Property | 2018 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 6,412 | 6,021 | 6,009 | 6,095 | 5,970 |  |  |
Cumulative Number of Claims | claim | 176 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 6,414 | 6,021 | 6,009 | 6,036 | $ 2,859 |  |  |
Special Property | 2019 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 3,617 | 3,140 | 3,385 | 3,661 |  |  |  |
Incurred but Not Reported Liabilities | $ 62 |  |  |  |  |  |  |
Cumulative Number of Claims | claim | 294 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 3,466 | 3,072 | 2,825 | $ 1,633 |  |  |  |
Special Property | 2020 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 45,850 | 42,160 | 42,334 |  |  |  |  |
Incurred but Not Reported Liabilities | $ 2,263 |  |  |  |  |  |  |
Cumulative Number of Claims | claim | 960 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 42,343 | 36,127 | $ 18,274 |  |  |  |  |
Special Property | 2021 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 19,393 | 21,383 |  |  |  |  |  |
Incurred but Not Reported Liabilities | $ 758 |  |  |  |  |  |  |
Cumulative Number of Claims | claim | 1,386 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 17,028 | $ 7,004 |  |  |  |  |  |
Special Property | 2022 |  |  |  |  |  |  |  |
Claims Development |  |  |  |  |  |  |  |
Incurred Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | 35,650 |  |  |  |  |  |  |
Incurred but Not Reported Liabilities | $ 10,515 |  |  |  |  |  |  |
Cumulative Number of Claims | 1,425 |  |  |  |  |  |  |
Cumulative Paid Losses and Allocated Loss Adjustment Expenses, Net of Reinsurance | $ 7,337 |  |  |  |  |  |  |

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