CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 424,281	$ 303,072
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,523	32,472
Deferred tax expense	3,378	6,863
Loss on debt extinguishment	28,498	0
Net (gains) losses on investments and other financial instruments	5,518	(5,161)
Change in certain assets and liabilities:
Accrued investment income	267	(2,217)
Reinsurance recoverable on loss reserves	12,947	(16,111)
Reinsurance recoverable on paid losses	35,965	(37)
Premium receivable	(1,007)	(593)
Deferred insurance policy acquisition costs	668	(1,069)
Profit commission receivable	(3,054)	(4,464)
Loss reserves	(156,344)	55,699
Unearned premiums	(23,951)	(23,348)
Return premium accrual	(4,500)	2,500
Current income taxes	22,831	(1,357)
Other, net	(13,341)	3,173
Net cash provided by (used in) operating activities	361,679	349,422
Cash flows from investing activities:
Purchases of investments	(375,754)	(1,097,418)
Proceeds from sales of investments	266,374	142,754
Proceeds from maturity of fixed income securities	401,112	548,727
Additions to property and equipment	(2,146)	(1,405)
Net cash provided by (used in) investing activities	289,586	(407,342)
Cash flows from financing activities:
Purchase of convertible junior subordinated debentures	(74,865)	0
Repayment of FHLB Advance	(155,000)	0
Cash portion of loss on debt extinguishment	(28,498)	0
Repurchase of common stock	(219,073)	0
Dividends paid	(50,838)	(41,186)
Payment of withholding taxes related to share-based compensation net share settlement	(8,688)	(6,621)
Net cash provided by (used in) financing activities	(536,962)	(47,807)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	114,303	(105,727)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	304,958	296,680
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 419,261	$ 190,953