CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net income	$ 378,325	$ 345,601
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,969	19,372
Deferred tax expense (benefit)	4,508	(1,065)
Equity compensation	18,286	17,514
Net gains (losses) on investments and other financial instruments	(8,785)	(12,685)
Change in certain assets and liabilities:
Accrued investment income	(1,628)	12
Reinsurance recoverable on loss reserves	(9,044)	(6,235)
Reinsurance recoverable on paid losses	9,012	17,841
Premiums receivable	1,902	934
Deferred insurance policy acquisition costs	1,465	2,162
Loss reserves	(27,765)	(27,307)
Unearned premiums	(18,894)	(23,410)
Return premium accrual	(5,700)	(2,300)
Current income taxes	26,993	7,846
Other, net	(37,439)	(6,702)
Net cash provided by (used in) operating activities	359,775	356,948
Cash flows from investing activities:
Purchases of investments	(737,607)	(830,773)
Proceeds from sales of investments	12,841	269,728
Proceeds from maturity of fixed income securities	616,633	404,546
Proceeds from sale of equipment	0	142
Additions to property and equipment	(279)	(671)
Net cash provided by (used in) investing activities	(108,412)	(157,028)
Cash flows from financing activities:
Repurchase of common stock	(251,217)	(150,192)
Dividends paid	(63,936)	(58,718)
Payment of withholding taxes related to share-based compensation net share settlement	(19,046)	(7,199)
Net cash provided by (used in) financing activities	(334,199)	(216,109)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	(82,836)	(16,189)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	370,644	332,913
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 287,808	$ 316,724