Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 51,074	$ 198,905
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,967	20,145
Net realized investment losses (gains)	75,595	(102,813)
Bond amortization, net	17,279	14,650
Excess tax benefit from exercise of stock options	(106)	(169)
Increase in premiums receivables	(46,952)	(29,613)
Change in current and deferred income taxes	(35,822)	16,632
Increase in deferred policy acquisition costs	(8,043)	(6,972)
Increase in unpaid losses and loss adjustment expenses	(21,079)	(23,929)
Increase in unearned premiums	56,562	59,092
(Decrease) increase in accounts payable and accrued expenses	(17,509)	15,968
Share-based compensation	2,946	2,741
Changes in other payables	10,255	(14,643)
Other, net	2,382	1,645
Net cash provided by operating activities	148,707	199,497
CASH FLOWS FROM INVESTING ACTIVITIES
Fixed maturities available-for-sale in nature: Purchases	(807,150)	(393,208)
Fixed maturities available-for-sale in nature: Sales	211,724	175,919
Fixed maturities available-for-sale in nature: Calls or maturities	283,311	213,865
Equity securities available-for-sale in nature:
Purchases	(573,011)	(706,461)
Sales	641,854	522,662
Calls or maturities	2,378	0
Changes in securities payable and receivable	(6,658)	(5,622)
Net decrease in short-term investments and purchased options	210,274	23,788
Purchase of fixed assets	(16,384)	(20,880)
Sale of fixed assets	136	209
Business acquisition, net of cash acquired	7,771	0
Other, net	2,291	2,896
Net cash used in investing activities	(43,464)	(186,832)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(102,183)	(101,461)
Excess tax benefit from exercise of stock options	106	169
Proceeds from stock options exercised	2,111	1,800
Proceeds from bank loan	0	100,000
Net cash (used in) provided by financing activities	(99,966)	508
Net increase in cash	5,277	13,173
Cash:
Beginning of the year	289,907	266,508
End of period	295,184	279,681
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	2,228	1,840
Income taxes paid	$ 31,385	$ 60,049