Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
REVENUES:
Net premiums written	$ 1,571,037	$ 1,525,382	$ 4,690,364	$ 4,541,038
Change in net unearned premiums	(39,479)	(64,578)	(193,752)	(298,977)
Net premiums earned	1,531,558	1,460,804	4,496,612	4,242,061
Net investment income	133,214	179,225	385,036	486,665
Insurance service fees	35,192	26,345	107,652	81,970
Net realized investment gains	66,419	72,258	113,020	234,180
Marketable Securities, Realized Loss, Other than Temporary Impairments, Amount	(12,515)	0	(12,515)	0
Revenues from wholly-owned investees	107,059	101,568	305,261	298,693
Other income	30	405	335	931
Total revenues	1,860,957	1,840,605	5,395,401	5,344,500
OPERATING COSTS AND EXPENSES:
Losses and loss expenses	926,355	887,123	2,733,298	2,576,996
Other operating costs and expenses	573,541	544,303	1,698,169	1,593,619
Expenses from wholly-owned investees	100,500	97,797	288,900	290,823
Interest expense	31,641	32,929	99,210	93,570
Total operating costs and expenses	1,632,037	1,562,152	4,819,577	4,555,008
Income before income taxes	228,920	278,453	575,824	789,492
Income tax expense	(76,184)	(89,662)	(181,595)	(250,840)
Net income before noncontrolling interests	152,736	188,791	394,229	538,652
Noncontrolling interests	(129)	(252)	(280)	(479)
Net income to common stockholders	$ 152,607	$ 188,539	$ 393,949	$ 538,173
NET INCOME PER SHARE:
Basic	$ 1.24	$ 1.48	$ 3.17	$ 4.20
Diluted	$ 1.18	$ 1.42	$ 3.02	$ 4.02