Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Net premiums earned (Note 8)	$ 235,857	$ 233,238
Services revenue (Note 4)	12,588	10,984
Net investment income (Note 6)	69,221	58,453
Net gains (losses) on investments and other financial instruments (includes net realized gains (losses) on investments of $(3,682) and $(5,506)) (Note $0)	490	5,585
Other income	1,262	1,592
Total revenues	319,418	309,852
Expenses
Provision for losses (Note $0)	(7,034)	(16,929)
Policy acquisition costs	6,794	6,293
Cost of services	9,327	10,398
Other operating expenses	82,636	83,269
Interest expense (Note 12)	29,046	21,439
Amortization of other acquired intangible assets	0	1,371
Total expenses	120,769	105,841
Pretax income	198,649	204,011
Income tax provision	46,295	46,254
Net income	$ 152,354	$ 157,757
Net income per share
Basic (in usd per share)	$ 0.99	$ 1.00
Diluted (in usd per share)	$ 0.98	$ 0.98
Weighted average number of common shares outstanding—basic (in shares)	153,817	158,304
Weighted average number of common and common equivalent shares outstanding—diluted (in shares)	155,971	161,349