CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 294,663	$ 496,653
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40,660	35,778
Deferred tax expense	28,427	7,628
Loss on debt extinguishment	26,736	0
Net realized investment (gains) losses	(10,851)	(3,986)
Change in certain assets and liabilities:
Accrued investment income	1,923	(319)
Reinsurance recoverable on loss reserves	(61,502)	13,762
Reinsurance recoverable on paid losses	459	1,375
Premium receivable	1,616	3,286
Deferred insurance policy acquisition costs	(2,707)	(122)
Profit commission receivable	13,909	3,868
Loss reserves	285,115	(71,722)
Unearned premiums	(65,231)	(17,429)
Return premium accrual	(300)	(9,600)
Current income taxes	(40,855)	(8,765)
Other, net	(3,209)	7,756
Net cash provided by operating activities	508,853	458,163
Cash flows from investing activities:
Purchases of investments	(1,994,286)	(1,043,003)
Proceeds from sales of investments	741,732	201,369
Proceeds from maturity of fixed income securities	776,709	536,747
Additions to property and equipment	(2,214)	(4,079)
Net cash used in investing activities	(478,059)	(308,966)
Cash flows from financing activities:
Proceeds from issuance of senior notes	640,250	0
Purchase of senior notes	(179,735)	0
Payment of original issue discount - senior notes	(2,969)	0
Purchase of convertible junior subordinated debentures	(36,392)	0
Payment of original issue discount - convertible junior subordinated debentures	(15,049)	0
Cash portion of loss on debt extinguishment	(25,266)	0
Payment of debt issuance costs	(1,197)	0
Repurchase of common stock	(119,997)	(105,766)
Dividends paid	(61,745)	(20,989)
Payment of withholding taxes related to share-based compensation net share settlement	(8,940)	(5,726)
Net cash provided by ( used in) financing activities	188,960	(132,481)
Net increase in cash and cash equivalents and restricted cash and cash equivalents	219,754	16,716
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	169,056	155,038
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 388,810	$ 171,754