CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Premiums written:
Direct	$ 283,523	$ 283,224	$ 566,528	$ 557,948
Assumed	2,202	3,899	4,333	6,758
Ceded	(43,988)	(65,738)	(87,625)	(97,314)
Net premiums written	241,737	221,385	483,236	467,392
Decrease in unearned premiums, net	9,802	22,177	23,348	37,071
Net premiums earned	251,539	243,562	506,584	504,463
Investment income, net of expenses	41,129	39,679	79,022	81,026
Net realized investment gains	2,173	6,701	4,388	8,592
Other revenue	3,011	4,026	5,815	6,780
Total revenues	297,852	293,968	595,809	600,861
Losses and expenses:
Losses incurred, net	29,164	217,374	68,800	278,330
Amortization of deferred policy acquisition costs	3,025	2,909	5,721	5,419
Other underwriting and operating expenses, net	53,798	44,273	101,821	86,535
Interest expense	17,997	12,929	35,982	25,855
Total losses and expenses	103,984	277,485	212,324	396,139
Income before tax	193,868	16,483	383,485	204,722
Provision for income taxes	40,817	2,436	80,413	40,870
Net income	$ 153,051	$ 14,047	$ 303,072	$ 163,852
Earnings per share:
Basic (in dollars per share)	$ 0.45	$ 0.04	$ 0.89	$ 0.48
Diluted (in dollars per share)	$ 0.44	$ 0.04	$ 0.87	$ 0.48
Weighted average common shares outstanding - basic (in shares)	339,326	338,593	339,116	341,323
Weighted average common shares outstanding - diluted (in shares)	356,536	339,661	356,461	362,003