CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 151,941	$ 143,637
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,908	15,833
Deferred tax expense	7,755	39,388
Net realized investment losses	526	329
Change in certain assets and liabilities:
Accrued investment income	1,302	937
Reinsurance recoverable on loss reserves	1,453	3,000
Reinsurance recoverable on paid losses	(121)	154
Premium receivable	3,494	1,344
Deferred insurance policy acquisition costs	258	(87)
Profit commission receivable	(2,836)	377
Loss reserves	(18,755)	(61,464)
Unearned premiums	(5,481)	4,754
Return premium accrual	(3,100)	(5,500)
Current income taxes	30,983	(3,149)
Other, net	(14,446)	(5,587)
Net cash provided by operating activities	164,881	133,966
Cash flows from investing activities:
Purchases of investments	(348,746)	(209,497)
Proceeds from sales of investments	106,010	10,844
Proceeds from maturity of fixed income securities	202,929	155,605
Additions to property and equipment	(308)	(5,208)
Net cash used in investing activities	(40,115)	(48,256)
Cash flows from financing activities:
Repurchase of common stock	(11,640)	0
Payment of withholding taxes related to share-based compensation net share settlement	(5,652)	(8,073)
Net cash used in financing activities	(17,292)	(8,073)
Net increase in cash and cash equivalents and restricted cash and cash equivalents	107,474	77,637
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	155,038	99,851
Cash and cash equivalents and restricted cash and cash equivalents at end of period	$ 262,512	$ 177,488