Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
REVENUES:
Net premiums written	$ 1,423,625	$ 1,275,887	$ 4,142,489	$ 3,670,404
Change in net unearned premiums	(94,763)	(89,354)	(298,993)	(236,863)
Net premiums earned	1,328,862	1,186,533	3,843,496	3,433,541
Net investment income	125,634	116,019	405,300	434,888
Insurance service fees	26,121	26,208	80,509	77,121
Net investment gains	43,869	17,226	96,896	84,989
Change in valuation allowance, net of other-than-temporary impairments	0	5,000	0	9,014
Revenues from wholly-owned investees	109,390	68,087	284,900	173,196
Other income	248	1,428	754	2,204
Total revenues	1,634,124	1,420,501	4,711,855	4,214,953
OPERATING COSTS AND EXPENSES:
Losses and loss expenses	798,276	736,632	2,348,425	2,147,306
Other operating costs and expenses	504,096	451,487	1,479,986	1,332,024
Expenses from wholly-owned investees	103,170	66,177	273,615	172,438
Interest expense	30,349	32,512	92,667	93,750
Total operating costs and expenses	1,435,891	1,286,808	4,194,693	3,745,518
Income before income taxes	198,233	133,693	517,162	469,435
Income tax expense	(60,045)	(32,685)	(147,249)	(124,291)
Net income before noncontrolling interests	138,188	101,008	369,913	345,144
Noncontrolling interests	(1,214)	(61)	(367)	(41)
Net income to common stockholders	$ 136,974	$ 100,947	$ 369,546	$ 345,103
NET INCOME PER SHARE:
Basic	$ 1.01	$ 0.74	$ 2.72	$ 2.51
Diluted	$ 0.97	$ 0.71	$ 2.62	$ 2.41