CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Premiums written:
Direct	$ 1,100,918	$ 1,105,027	$ 1,108,570
Assumed	14,366	12,835	8,535
Ceded	(181,896)	(202,821)	(156,373)
Net premiums written	933,388	915,041	960,732
Decrease (increase) in unearned premiums	37,419	37,510	46,401
Net premiums earned	970,807	952,551	1,007,133
Investment income, net of expenses	244,640	214,740	167,476
Net gains (losses) on investments and other financial instruments	(9,846)	(14,141)	(7,463)
Other revenue	2,130	1,952	5,639
Total revenues	1,207,731	1,155,102	1,172,785
Losses and expenses:
Losses incurred, net	(14,861)	(20,856)	(254,565)
Amortization of deferred insurance policy acquisition costs	8,957	10,820	12,366
Other underwriting and operating expenses, net	209,324	226,004	236,697
Loss on debt extinguishment	0	0	40,199
Interest expense	35,602	36,905	48,054
Total losses and expenses	239,022	252,873	82,751
Income before tax	968,709	902,229	1,090,034
Provision for income taxes	205,715	189,280	224,685
Net income	$ 762,994	$ 712,949	$ 865,349
Earnings per share:
Basic (in dollars per share)	$ 2.92	$ 2.51	$ 2.83
Diluted (in dollars per share)	$ 2.89	$ 2.49	$ 2.79
Weighted average common shares outstanding - basic (in shares)	261,684	283,605	305,847
Weighted average common shares outstanding - diluted (in shares)	263,995	287,155	311,229