CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Premiums written:
Direct	$ 1,108,570	$ 1,123,117	$ 1,106,632
Assumed	8,535	8,924	10,837
Ceded	(156,373)	(163,031)	(188,727)
Net premiums written	960,732	969,010	928,742
Decrease (increase) in unearned premiums	46,401	45,409	93,201
Net premiums earned	1,007,133	1,014,419	1,021,943
Investment income, net of expenses	167,476	156,438	154,396
Net gains (losses) on investments and other financial instruments	(7,463)	5,861	12,576
Other revenue	5,639	8,957	10,231
Total revenues	1,172,785	1,185,675	1,199,146
Losses and expenses:
Losses incurred, net	(254,565)	64,577	364,774
Amortization of deferred policy acquisition costs	12,366	12,602	12,380
Other underwriting and operating expenses, net	236,697	198,445	176,398
Loss on debt extinguishment	40,199	36,914	26,736
Interest expense	48,054	71,360	59,595
Total losses and expenses	82,751	383,898	639,883
Income before tax	1,090,034	801,777	559,263
Provision for income taxes	224,685	166,794	113,170
Net income	$ 865,349	$ 634,983	$ 446,093
Earnings per share:
Basic (in dollars per share)	$ 2.83	$ 1.90	$ 1.31
Diluted (in dollars per share)	$ 2.79	$ 1.85	$ 1.29
Weighted average common shares outstanding - basic (in shares)	305,847	334,330	339,953
Weighted average common shares outstanding - diluted (in shares)	311,229	351,308	359,293