Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
REVENUES:
Net premiums written	$ 1,525,382	$ 1,423,625	$ 4,541,038	$ 4,142,489
Change in net unearned premiums	(64,578)	(94,763)	(298,977)	(298,993)
Net premiums earned	1,460,804	1,328,862	4,242,061	3,843,496
Net investment income	179,225	125,634	486,665	405,300
Insurance service fees	26,345	26,121	81,970	80,509
Net investment gains	72,258	43,869	234,180	96,896
Revenues from wholly-owned investees	101,568	109,390	298,693	284,900
Other income	405	248	931	754
Total revenues	1,840,605	1,634,124	5,344,500	4,711,855
OPERATING COSTS AND EXPENSES:
Losses and loss expenses	887,123	798,276	2,576,996	2,348,425
Other operating costs and expenses	544,303	504,096	1,593,619	1,479,986
Expenses from wholly-owned investees	97,797	103,170	290,823	273,615
Interest expense	32,929	30,349	93,570	92,667
Total operating costs and expenses	1,562,152	1,435,891	4,555,008	4,194,693
Income before income taxes	278,453	198,233	789,492	517,162
Income tax expense	(89,662)	(60,045)	(250,840)	(147,249)
Net income before noncontrolling interests	188,791	138,188	538,652	369,913
Noncontrolling interests	(252)	(1,214)	(479)	(367)
Net income to common stockholders	$ 188,539	$ 136,974	$ 538,173	$ 369,546
NET INCOME PER SHARE:
Basic	$ 1.48	$ 1.01	$ 4.20	$ 2.72
Diluted	$ 1.42	$ 0.97	$ 4.02	$ 2.62