Consolidated Statements Of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Net premiums earned	$ 3,952,482	$ 3,741,948	$ 3,555,635
Net investment income	168,356	129,727	134,858
Net realized investment (losses) gains	(488,080)	111,658	85,731
Other	10,308	10,024	8,287
Total revenues	3,643,066	3,993,357	3,784,511
Expenses:
Losses and loss adjustment expenses	3,362,219	2,760,155	2,395,343
Policy acquisition costs	654,612	633,385	627,788
Other operating expenses	279,718	283,397	285,831
Interest	17,232	17,113	17,048
Total expenses	4,313,781	3,694,050	3,326,010
(Loss) income before income taxes	(670,715)	299,307	458,501
Income tax (benefit) expense	(158,043)	51,370	83,894
Net (loss) income	$ (512,672)	$ 247,937	$ 374,607
Net (loss) income per share:
Basic (in dollars per share)	$ (9.26)	$ 4.48	$ 6.77
Diluted (in dollars per share)	$ (9.26)	$ 4.48	$ 6.77