Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 167,609	$ 57,197
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	13,394	16,919
Net realized investment (gains) losses	(122,902)	23,365
Bond amortization, net	10,113	5,714
Excess tax benefit from exercise of stock options	(5)	(252)
Increase in premiums receivables	(18,313)	(10,674)
Change in current and deferred income taxes	40,808	(8,429)
Increase in deferred policy acquisition costs	(4,751)	(3,689)
Increase (decrease) in unpaid losses and loss adjustment expenses	14,046	(29,087)
Increase in unearned premiums	39,935	17,683
(Decrease) increase in accounts payable and accrued expenses	(5,800)	21,671
Share-based compensation	1,069	(100)
Changes in other payables	(9,146)	8,020
Other, net	2,332	(1,880)
Net cash provided by operating activities	128,389	96,458
CASH FLOWS FROM INVESTING ACTIVITIES
Fixed maturities available-for-sale in nature: Purchases	(331,438)	(430,984)
Fixed maturities available-for-sale in nature: Sales	126,426	117,076
Fixed maturities available-for-sale in nature: Calls or maturities	117,104	163,734
Equity securities available-for-sale in nature:
Purchases	(510,895)	(326,896)
Sales	390,438	322,250
Changes in securities payable and receivable	(16,330)	24,450
Net decrease in short-term investments and purchased options	86,212	128,282
Purchase of fixed assets	(12,204)	(8,361)
Sale of fixed assets	207	453
Other, net	1,557	1,413
Net cash used in investing activities	(148,923)	(8,583)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid to shareholders	(67,624)	(67,303)
Excess tax benefit from exercise of stock options	5	252
Proceeds from stock options exercised	118	1,324
Proceeds from bank loan	80,000	0
Net cash provided by (used in) financing activities	12,499	(65,727)
Net (decrease) increase in cash	(8,035)	22,148
Cash:
Beginning of the year	266,508	158,183
End of period	258,473	180,331
SUPPLEMENTAL CASH FLOW DISCLOSURE
Interest paid	1,152	582
Income taxes paid	$ 30,049	$ 17,266