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Schedule II. Condensed Financial Information of Registrant - Condensed Statements of Income (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenues |  |  |
Net investment income | $ 31,339 | $ 27,223 | $ 25,435
Net unrealized gains (losses) on equity securities | 1,228 | (8,092) | 12,315
Fee and other income | 582 | 468 | 496
Total revenues | 306,853 | 294,737 | 315,934
Expenses |  |  |
Total expenses | 229,476 | 227,091 | 236,485
Income tax expense (benefit) | 15,269 | 12,044 | 13,693
Net income | 62,108 | 55,602 | 65,756
Parent Company [Member] |  |  |
Revenues |  |  |
Net investment income | 4,861 | 2,395 | 896
Net unrealized gains (losses) on equity securities | (845) | (490) | 2,590
Fee and other income | 8,933 | 9,533 | 8,541
Total revenues | 12,949 | 11,438 | 12,027
Expenses |  |  |
Other operating costs | 8,932 | 9,533 | 8,541
Total expenses | 8,932 | 9,533 | 8,541
Income before income taxes and equity in earnings of subsidiaries | 4,017 | 1,905 | 3,486
Income tax expense (benefit) | 1,055 | 714 | (1,188)
Gain before equity in earnings of subsidiaries | 2,962 | 1,191 | 4,674
Equity in net income of subsidiaries | 59,146 | 54,411 | 61,083
Net income | $ 62,108 | $ 55,602 | $ 65,757

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