Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 96,767	$ 134,293
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	23,715	27,903
Net realized investment losses (gains)	7,153	(78,656)
Bond amortization, net	8,659	6,613
Excess tax benefit from exercise of stock options	(258)	(116)
Increase in premiums receivables	(27,431)	(57,518)
Change in current and deferred income taxes	6,758	10,848
Increase in deferred policy acquisition costs	(10,374)	(14,883)
Decrease in unpaid losses and loss adjustment expenses	(25,589)	(6,859)
Increase in unearned premiums	46,891	77,849
Increase in accounts payable and accrued expenses	38,749	6,553
Share-based compensation	216	312
Changes in other payables	9,142	10,503
Other, net	(4,681)	(3,512)
Net cash provided by operating activities	169,717	113,330
CASH FLOWS FROM INVESTING ACTIVITIES
Fixed maturities available-for-sale in nature: Purchases	(625,326)	(386,262)
Fixed maturities available-for-sale in nature: Sales	172,557	78,341
Fixed maturities available-for-sale in nature: Calls or maturities	232,426	328,592
Equity securities available-for-sale in nature:
Purchases	(463,056)	(236,785)
Sales	677,017	172,144
Calls	0	923
Changes in securities payable and receivable	(43,918)	(1,320)
Net decrease in short-term investments	42,614	14,510
Purchase of fixed assets	(12,983)	(12,205)
Sale of fixed assets	610	1,864
Other, net	1,547	1,904
Net cash used in investing activities	(18,512)	(38,294)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(100,967)	(100,469)
Proceeds from Bank Loan	40,000	0
Excess tax benefit from exercise of stock options	258	116
Proceeds from stock options exercised	1,382	2,098
Net cash used in financing activities	(59,327)	(98,255)
Net increase (decrease) in cash	91,878	(23,219)
Cash:
Beginning of the year	158,183	211,393
End of period	250,061	188,174
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	796	1,319
Income taxes paid	$ 17,303	$ 29,330