CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 496,653	$ 512,351
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	35,778	45,267
Deferred tax expense	7,628	145,397
Net realized investment (gains) losses	(3,986)	1,112
Change in certain assets and liabilities:
Accrued investment income	(319)	694
Reinsurance recoverable on loss reserves	13,762	15,193
Reinsurance recoverable on paid losses	1,375	761
Premium receivable	3,286	2,405
Deferred insurance policy acquisition costs	(122)	176
Profit commission receivable	3,868	(9,098)
Loss reserves	(71,722)	(264,589)
Unearned premiums	(17,429)	14,680
Return premium accrual	(9,600)	(18,600)
Current income taxes	(8,765)	(75,393)
Other, net	7,756	13,191
Net cash provided by operating activities	458,163	383,547
Cash flows from investing activities:
Purchases of investments	(1,043,003)	(1,074,849)
Proceeds from sales of investments	201,369	338,939
Proceeds from maturity of fixed income securities	536,747	594,679
Net increase in payable for securities	0	43,679
Additions to property and equipment	(4,079)	(10,659)
Net cash used in investing activities	(308,966)	(108,211)
Cash flows from financing activities:
Repurchase of common stock	(105,766)	(100,059)
Dividends paid	(20,989)	0
Payment of withholding taxes related to share-based compensation net share settlement	(5,726)	(8,131)
Net cash used in financing activities	(132,481)	(108,190)
Net increase in cash and cash equivalents and restricted cash and cash equivalents	16,716	167,146
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	$ 171,754	$ 266,997