Schedule II. Condensed Financial Information of Registrant - Condensed Statements of Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenues
Net investment income	$ 26,993	$ 29,212	$ 31,339
Net unrealized gains on equity securities	3,719	9,508	1,228
Fee and other income	449	260	582
Total revenues	317,252	309,043	306,853
Expenses
Total expenses	258,401	239,987	229,476
Income tax expense	11,706	13,620	15,269
Net income	47,145	55,436	62,108
Parent Company [Member]
Revenues
Net investment income	3,593	2,279	4,861
Net unrealized gains on equity securities	(2,890)	141	(845)
Fee and other income	8,856	10,395	8,933
Total revenues	9,559	12,815	12,949
Expenses
Other operating costs	8,856	10,395	8,932
Total expenses	8,856	10,395	8,932
Income before income taxes and equity in earnings of subsidiaries	703	2,420	4,017
Income tax expense	617	1,412	1,055
Gain before equity in earnings of subsidiaries	86	1,008	2,962
Equity in net income of subsidiaries	47,058	54,428	59,146
Net income	$ 47,144	$ 55,436	$ 62,108