Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues
Net premiums earned (Note 8)	$ 237,520	$ 237,731	$ 474,199	$ 473,588
Services revenue (Note 4)	10,924	13,265	23,040	25,853
Net investment income (Note 6)	72,769	73,766	141,343	142,987
Net gains (losses) on investments and other financial instruments (includes net realized gains (losses) on investments of $(2,053), $(3,019), $(3,487) and (6,701)) (Note 6)	(4,852)	(4,487)	(5,575)	(3,997)
Income (loss) on consolidated VIEs (Note 7)	185	0	613	0
Other income	1,458	872	2,498	2,134
Total revenues	318,004	321,147	636,118	640,565
Expenses
Provision for losses	12,097	(1,745)	27,264	(8,779)
Policy acquisition costs	7,205	6,522	13,593	13,316
Cost of services	8,418	9,535	17,189	18,862
Other operating expenses	89,397	91,648	166,246	174,284
Interest expense (Note 12)	25,874	27,064	48,373	56,110
Total expenses	142,991	133,024	272,665	253,793
Pretax income	175,013	188,123	363,453	386,772
Income tax provision	33,217	36,220	77,099	82,515
Net income	$ 141,796	$ 151,903	$ 286,354	$ 304,257
Net income per share
Basic (in usd per share)	$ 1.03	$ 0.99	$ 2.02	$ 1.98
Diluted (in usd per share)	$ 1.02	$ 0.98	$ 2	$ 1.96
Weighted average number of common shares outstanding—basic (in shares)	137,376	153,110	141,910	153,879
Weighted average number of common and common equivalent shares outstanding—diluted (in shares)	138,360	154,399	143,012	155,271