Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Net premiums earned (Note 8)	$ 239,133	$ 240,262	$ 712,721	$ 686,929
Services revenue (Note 4)	12,167	10,892	38,020	33,673
Net investment income (Note 6)	78,396	67,805	221,383	189,606
Net gains (losses) on investments and other financial instruments (includes net realized gains (losses) on investments of $2,409, $(2,775), $(4,292) and $(11,636)) (Note 6)	2,174	(8,555)	(1,823)	(3,206)
Income (loss) on consolidated VIEs (Note 7)	465	0	465	0
Other income	1,522	2,109	3,656	4,942
Total revenues	333,857	312,513	974,422	911,944
Expenses
Provision for losses (Note 11)	6,889	(8,135)	(1,890)	(46,696)
Policy acquisition costs	6,724	6,920	20,040	18,431
Cost of services	9,542	8,886	28,404	29,541
Other operating expenses	85,919	79,206	260,203	252,360
Interest expense (Note 12)	29,391	23,282	85,501	66,526
Amortization of other acquired intangible assets	0	1,371	0	4,112
Total expenses	138,465	111,530	392,258	324,274
Pretax income	195,392	200,983	582,164	587,670
Income tax provision	43,500	44,401	126,015	127,244
Net income	$ 151,892	$ 156,582	$ 456,149	$ 460,426
Net income per share
Basic (in usd per share)	$ 1	$ 0.99	$ 2.98	$ 2.9
Diluted (in usd per share)	$ 0.99	$ 0.98	$ 2.95	$ 2.86
Weighted average number of common shares outstanding—basic (in shares)	151,846	158,461	153,199	158,992
Weighted average number of common and common equivalent shares outstanding—diluted (in shares)	153,073	160,147	154,607	160,869