Condensed Consolidated Statements of Earnings and Comprehensive Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Net premiums earned	$ 398,345	$ 360,676
Net investment income	36,726	32,847
Net realized gains	14,912	5,994
Net unrealized gains (losses) on equity securities	(42,318)	45,314
Consolidated revenue	407,665	444,831
Losses and settlement expenses	177,238	143,824
Policy acquisition costs	123,687	110,454
Insurance operating expenses	26,874	28,703
Interest expense on debt	1,335	1,618
General corporate expenses	2,948	5,010
Total expenses	332,082	289,609
Equity in earnings of unconsolidated investees	3,048	4,769
Earnings before income taxes	78,631	159,991
Income tax expense	15,417	32,091
Net earnings	63,214	127,900
Other comprehensive earnings (loss), net of tax	30,030	(12,671)
Comprehensive earnings	$ 93,244	$ 115,229
Basic net earnings per share	$ 0.69	$ 1.4
Diluted net earnings per share	$ 0.68	$ 1.39
Weighted average number of common shares outstanding:
Basic	91,770	91,368
Diluted	92,528	92,326