Unaudited Condensed Consolidated Statements Of Operations And Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
REVENUES:
Gross premiums written	$ 901,393	$ 837,081
Premiums ceded	(129,779)	(142,029)
Net premiums written	771,614	695,052
Change in unearned premiums	(241,329)	(231,824)
Net premiums earned	530,285	463,228
Net investment income	47,619	33,388
Net realized investment gains	54,205	79,637
Total revenues	632,109	576,253
EXPENSES:
Net losses and loss expenses	275,286	255,178
Acquisition costs	67,722	56,685
General and administrative expenses	80,340	82,680
Amortization of intangible assets	633	633
Interest expense	14,534	14,134
Foreign exchange loss	49	2,518
Total expenses	438,564	411,828
Income before income taxes	193,545	164,425
Income tax expense	16,573	5,433
NET INCOME	176,972	158,992
Other comprehensive loss:
Other comprehensive loss	0	0
COMPREHENSIVE INCOME	$ 176,972	$ 158,992
PER SHARE DATA
Basic earnings per share	$ 5.33	$ 4.59
Diluted earnings per share	$ 5.23	$ 4.49
Weighted average common shares outstanding	33,181,729	34,613,606
Weighted average common shares and common share equivalents outstanding	33,861,554	35,431,843
Dividends paid per share	$ 0.500	$ 0.375