CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 175,013	$ 150,021
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,395	17,422
Deferred tax expense	5,945	2,635
Loss on debt extinguishment	22,107	0
Net realized investment (gains) losses	1,505	(2,215)
Change in certain assets and liabilities:
Accrued investment income	1,502	(1,130)
Reinsurance recoverable on loss reserves	2,188	(7,859)
Reinsurance recoverable on paid losses	36,072	63
Premium receivable	(798)	937
Deferred insurance policy acquisition costs	133	(774)
Profit commission receivable	6,779	(5,430)
Loss reserves	(32,250)	32,573
Unearned premiums	(12,575)	(13,546)
Return premium accrual	(900)	2,900
Current income taxes	38,445	36,897
Other, net	(30,550)	(14,461)
Net cash provided by (used in) operating activities	228,011	198,033
Cash flows from investing activities:
Purchases of investments	(94,017)	(652,328)
Proceeds from sales of investments	218,373	59,378
Proceeds from maturity of fixed income securities	225,972	318,892
Additions to property and equipment	(888)	(441)
Net cash provided by (used in) investing activities	349,440	(274,499)
Cash flows from financing activities:
Purchase of convertible junior subordinated debentures	(56,965)	0
Repayment of FHLB Advance	(155,000)	0
Cash portion of loss on debt extinguishment	(22,107)	0
Repurchase of common stock	(123,640)	0
Dividends paid	(26,112)	(20,827)
Payment of withholding taxes related to share-based compensation net share settlement	(8,688)	(6,621)
Net cash provided by (used in) financing activities	(392,512)	(27,448)
Net increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	184,939	(103,914)
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	$ 489,897	$ 192,766