CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 163,852	$ 319,719
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	25,457	23,464
Deferred tax expense	14,834	7,043
Net realized investment (gains) losses	(8,592)	219
Change in certain assets and liabilities:
Accrued investment income	2,915	(271)
Reinsurance recoverable on loss reserves	(41,803)	14,926
Reinsurance recoverable on paid losses	170	(13,955)
Premium receivable	1,559	(2,402)
Deferred insurance policy acquisition costs	(2,114)	219
Profit commission receivable	32,331	(976)
Loss reserves	242,062	(52,117)
Unearned premiums	(37,071)	(8,986)
Return premium accrual	(1,900)	(7,300)
Current income taxes	26,371	(2,300)
Other, net	2,054	4,328
Net cash provided by operating activities	420,125	281,611
Cash flows from investing activities:
Purchases of investments	(992,722)	(677,391)
Proceeds from sales of investments	476,639	183,620
Proceeds from maturity of fixed income securities	469,559	327,818
Additions to property and equipment	(942)	(3,280)
Net cash used in investing activities	(47,466)	(169,233)
Cash flows from financing activities:
Repurchase of common stock	(119,997)	(36,581)
Dividends paid	(41,426)	0
Payment of withholding taxes related to share-based compensation net share settlement	(8,899)	(5,652)
Net cash used in financing activities	(170,322)	(42,233)
Net increase in cash and cash equivalents and restricted cash and cash equivalents	202,337	70,145
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	$ 371,393	$ 225,183