Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
REVENUES:
Net premiums written	$ 1,203,526		$ 1,083,303
Change in net unearned premiums	(103,875)		(100,806)
Net premiums earned	1,099,651		982,497
Net investment income	157,619		146,126
Insurance service fees	23,877		22,173
Net investment gains:
Net realized gains on investment sales	43,477		29,284
Change in valuation allowance, net of other-than-temporary impairments	4,014	[1]	0	[1]
Net investment gains	47,491		29,284
Revenues from wholly-owned investees	49,675		53,887
Other income	392		384
Total revenues	1,378,705		1,234,351
OPERATING COSTS AND EXPENSES:
Losses and loss expenses	679,472		607,095
Other operating costs and expenses	431,779		386,129
Expenses from wholly-owned investees	51,330		53,816
Interest expense	28,821		28,117
Total operating costs and expenses	1,191,402		1,075,157
Income before income taxes	187,303		159,194
Income tax expense	(52,071)		(43,599)
Net income before noncontrolling interests	135,232		115,595
Noncontrolling interests	86		(5)
Net income to common stockholders	$ 135,318		$ 115,590
NET INCOME PER SHARE:
Basic	$ 0.98		$ 0.82
Diluted	$ 0.94		$ 0.78

[1] Represents reduction of valuation allowance of $7 million, net of other-than-temporary-impairment of