Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (139,204)	$ 135,867
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,026	15,085
Net realized investment losses (gains)	251,320	(111,074)
Increase in premiums receivable	(20,312)	(24,923)
Decrease in reinsurance recoverables	8,397	106,588
Changes in current and deferred income taxes	(41,501)	31,338
Increase in deferred policy acquisition costs	(1,477)	(4,592)
Increase in loss and loss adjustment expense reserves	(23,310)	(41,800)
Increase in unearned premiums	29,256	37,480
Increase in accounts payable and accrued expenses	9,640	22,742
Share-based compensation	35	16
Other, net	8,276	7,960
Net cash provided by operating activities	97,146	174,687
Fixed maturity securities available for sale in nature:
Purchases	(334,517)	(146,592)
Sales	23,503	15,197
Calls or maturities	41,643	80,099
Equity securities available for sale in nature:
Purchases	(361,942)	(256,696)
Sales	269,320	227,787
Changes in securities payable and receivable	8,864	15,901
Decrease (increase) in short-term investments	254,811	(113,287)
Purchases of fixed assets	(10,305)	(8,430)
Other, net	4,790	1,421
Net cash used in investing activities	(103,833)	(184,600)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(34,875)	(34,726)
Proceeds from stock options exercised	0	453
Net cash used in financing activities	(34,875)	(34,273)
Net decrease in cash	(41,562)	(44,186)
Cash:
Beginning of the year	294,398	314,291
End of period	252,836	270,105
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	8,269	8,268
Income taxes paid (refunded), net	$ 0	$ 36