Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues:
Net premiums earned	$ 1,410,400	$ 1,320,652	$ 4,060,208	$ 3,723,355
Net investment income	83,970	72,738	244,208	206,726
Net realized investment gains	84,451	114,446	131,251	155,536
Other	6,105	22,538	21,022	23,837
Total revenues	1,584,926	1,530,374	4,456,689	4,109,454
Expenses:
Losses and loss adjustment expenses	882,745	918,439	3,043,596	2,759,117
Policy acquisition costs	236,164	230,293	692,765	630,016
Other operating expenses	108,518	86,861	283,996	245,651
Interest	7,181	7,717	21,562	23,288
Total expenses	1,234,608	1,243,310	4,041,919	3,658,072
Income before income taxes	350,318	287,064	414,770	451,382
Income tax expense	69,915	56,208	76,223	84,496
Net income	$ 280,403	$ 230,856	$ 338,547	$ 366,886
Net income per share:
Basic (in dollars per share)	$ 5.06	$ 4.17	$ 6.11	$ 6.63
Diluted (in dollars per share)	$ 5.06	$ 4.17	$ 6.11	$ 6.63
Weighted average shares outstanding:
Basic (in shares)	55,389	55,371	55,389	55,371
Diluted (in shares)	55,389	55,376	55,389	55,374