Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (108,327)	$ 73,462
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	17,244	17,337
Net realized investment gains	(23,321)	(38,192)
Increase in premiums receivable	(54,872)	(74,948)
(Increase) decrease in reinsurance recoverables	(594,986)	1,983
Changes in current and deferred income taxes	(30,688)	12,355
Increase in deferred policy acquisition costs	(1,139)	(14,094)
Increase in loss and loss adjustment expense reserves	640,550	73,518
Increase in unearned premiums	81,413	118,524
(Decrease) increase in accounts payable and accrued expenses	(70,773)	3,615
Other, net	76,170	19,066
Net cash (used in) provided by operating activities	(68,729)	192,626
Fixed maturity securities available for sale in nature:
Purchases	(299,354)	(419,763)
Sales	351,769	116,837
Calls or maturities	255,122	114,300
Equity securities available for sale in nature:
Purchases	(493,342)	(399,522)
Sales	805,966	365,377
Calls	0	7,185
Changes in securities payable and receivable	(31,936)	10,783
Decrease in short-term investments	75,683	16,151
Purchases of fixed assets	(13,143)	(10,271)
Other, net	837	4,044
Net cash provided by (used in) investing activities	651,602	(194,879)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(17,586)	(17,580)
Payments on finance lease obligations	(754)	(985)
Net cash used in financing activities	(18,340)	(18,565)
Net increase (decrease) in cash	564,533	(20,818)
Cash:
Beginning of the year	720,257	550,903
End of period	1,284,790	530,085
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	11,179	11,741
Income taxes (refunded) paid, net	$ (3,280)	$ 3,404