CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Premiums written:
Direct	$ 1,114,049	$ 1,100,918	$ 1,105,027
Assumed	14,448	14,366	12,835
Ceded	(190,019)	(181,896)	(202,821)
Net premiums written	938,478	933,388	915,041
Decrease in unearned premiums, net	27,334	37,419	37,510
Net premiums earned	965,812	970,807	952,551
Investment income, net of expenses	246,258	244,640	214,740
Net gains (losses) on investments and other financial instruments	334	(9,846)	(14,141)
Other revenue	1,232	2,130	1,952
Total revenues	1,213,636	1,207,731	1,155,102
Losses and expenses:
Losses incurred, net	48,903	(14,861)	(20,856)
Amortization of deferred insurance policy acquisition costs	7,120	8,957	10,820
Other underwriting and operating expenses, net	193,473	209,324	226,004
Interest expense	35,603	35,602	36,905
Total losses and expenses	285,099	239,022	252,873
Income before tax	928,537	968,709	902,229
Provision for income taxes	190,190	205,715	189,280
Net income	$ 738,347	$ 762,994	$ 712,949
Earnings per share:
Basic (in dollars per share)	$ 3.17	$ 2.92	$ 2.51
Diluted (in dollars per share)	$ 3.14	$ 2.89	$ 2.49
Weighted average common shares outstanding - basic (in shares)	232,975	261,684	283,605
Weighted average common shares outstanding - diluted (in shares)	235,099	263,995	287,155