Consolidated Statements of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
REVENUES:
Net premiums written	$ 1,126,139	$ 986,706	$ 3,266,857	$ 2,932,010
Change in net unearned premiums	(70,316)	(19,409)	(211,293)	(86,024)
Net premiums earned	1,055,823	967,297	3,055,564	2,845,986
Net investment income	114,063	119,143	409,261	392,435
Insurance service fees	22,279	22,175	69,487	64,050
Net investment gains (losses):
Net realized gains on investment sales	21,238	6,327	73,812	26,355
Other-than-temporary impairments	0	(1,123)	(400)	(3,705)
Net investment gains	21,238	5,204	73,412	22,650
Revenues from wholly-owned investees	65,922	61,983	175,943	166,488
Other income	406	310	1,364	1,118
Total revenues	1,279,731	1,176,112	3,785,031	3,492,727
OPERATING COSTS AND EXPENSES:
Losses and loss expenses	683,980	597,907	1,965,351	1,718,355
Other operating costs and expenses	405,850	369,217	1,193,040	1,108,007
Expenses from wholly-owned investees	64,388	60,963	174,059	159,871
Interest expense	28,068	26,725	84,317	78,780
Total operating costs and expenses	1,182,286	1,054,812	3,416,767	3,065,013
Income before income taxes	97,445	121,300	368,264	427,714
Income tax expense	(20,176)	(27,631)	(91,485)	(105,040)
Net income before noncontrolling interests	77,269	93,669	276,779	322,674
Noncontrolling interests	39	(50)	98	(238)
Net income to common stockholders	$ 77,308	$ 93,619	$ 276,877	$ 322,436
NET INCOME PER SHARE:
Basic	$ 0.56	$ 0.64	$ 1.97	$ 2.14
Diluted	$ 0.53	$ 0.61	$ 1.89	$ 2.05