Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 89,007	$ 219,117
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,982	31,164
Net realized investment losses (gains)	92,894	(164,403)
Decrease (increase) in premiums receivable	271	(37,693)
Decrease in reinsurance recoverables	28,566	94,517
Changes in current and deferred income taxes	(4,338)	49,667
Increase in deferred policy acquisition costs	(9,574)	(12,036)
Decrease in loss and loss adjustment expense reserves	(56,145)	(45,488)
Increase in unearned premiums	34,492	78,814
Increase in accounts payable and accrued expenses	48,778	32,560
Share-based compensation	70	52
Other, net	2,580	19,352
Net cash provided by operating activities	259,583	265,623
Fixed maturity securities available for sale in nature:
Purchases	(449,641)	(294,561)
Sales	106,986	53,969
Calls or maturities	84,238	138,846
Equity securities available for sale in nature:
Purchases	(680,955)	(554,130)
Sales	564,635	508,365
Calls	3,000	0
Changes in securities payable and receivable	(2,219)	2,450
Decrease (increase) in short-term investments	159,112	(108,370)
Purchases of fixed assets	(19,789)	(20,874)
Other, net	12,555	3,580
Net cash used in investing activities	(222,078)	(270,725)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(69,750)	(69,460)
Proceeds from stock options exercised	0	591
Net cash used in financing activities	(69,750)	(68,869)
Net decrease in cash	(32,245)	(73,971)
Cash:
Beginning of the year	294,398	314,291
End of period	262,153	240,320
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	8,298	8,297
Income taxes paid (refunded), net	$ 20,091	$ (22)