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Schedule II. Condensed Financial Information of Registrant - Condensed Balance Sheets (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Assets |  |  |  |
Fixed maturity securities available for sale, at fair value (amortized cost $338,593, allowance for credit losses of $0 in 2022and amortized cost $324,597, allowance for credit losses of $0 in 2021) | $ 321,121 | $ 341,769 |  |
Equity securities, at fair value(cost $50,185 and $44,175 in 2022 and 2021, respectively) | 62,058 | 64,140 |  |
Short-term investments | 14,120 | 57,431 |  |
Total investments | 888,987 | 1,012,571 |  |
Cash and cash equivalents | 61,469 | 70,722 |  |
Deferred income taxes | 22,794 | 14,384 |  |
Property and equipment, net | 7,225 | 6,459 |  |
Federal income tax recoverable | 1,453 | 6,414 |  |
Other assets | 14,132 | 11,374 |  |
Total assets | 1,269,279 | 1,402,724 |  |
Liabilities: |  |  |  |
Accounts payable and other liabilities | 38,058 | 37,883 |  |
Total liabilities | 951,847 | 1,003,401 |  |
Shareholders' equity (net of Treasury stock of $34,759 and $22,370 at December 31, 2022 and 2021, respectively) | 317,432 | 399,323 | $ 438,816 | $ 430,215
Total liabilities and shareholders’ equity | 1,269,279 | 1,402,724 |  |
Parent Company [Member] |  |  |  |
Assets |  |  |  |
Fixed maturity securities available for sale, at fair value (amortized cost $338,593, allowance for credit losses of $0 in 2022and amortized cost $324,597, allowance for credit losses of $0 in 2021) | 19,470 | 19,605 |  |
Equity securities, at fair value(cost $50,185 and $44,175 in 2022 and 2021, respectively) | 13,602 | 14,092 |  |
Short-term investments | 10,145 | 55,559 |  |
Investment in subsidiaries | 239,664 | 290,077 |  |
Total investments | 282,881 | 379,333 |  |
Cash and cash equivalents | 31,911 | 18,825 |  |
Deferred income taxes | 982 | 1,148 |  |
Notes receivable from subsidiaries | 1,855 | 2,275 |  |
Property and equipment, net | 2,736 | 2,003 |  |
Federal income tax recoverable | 543 | 857 |  |
Other assets | 1,752 | 1,295 |  |
Total assets | 322,660 | 405,736 |  |
Liabilities: |  |  |  |
Accounts payable and other liabilities | 5,228 | 6,413 |  |
Total liabilities | 5,228 | 6,413 |  |
Shareholders' equity (net of Treasury stock of $34,759 and $22,370 at December 31, 2022 and 2021, respectively) | 317,432 | 399,323 |  |
Total liabilities and shareholders’ equity | $ 322,660 | $ 405,736 |  |

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