Consolidated Statement of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
REVENUE
Net earned premium	$ 565,331	$ 524,251	$ 1,112,472	$ 1,032,731
Other revenue	66,957	60,601	129,339	115,829
Net investment income	53,290	52,422	110,300	104,017
Other operating income	7,188	7,475	12,389	14,796
Net realized investment gain	6,876	1,054	7,047	495
Other-than-temporary impairment credit losses	(397)	(350)	(397)	(3,479)
Total revenue	632,288	584,852	1,241,811	1,148,560
EXPENSE
Loss and loss adjustment expense, net	336,825	334,282	665,753	681,868
Policy acquisition costs, net	74,490	65,841	143,934	135,684
Other expense	161,144	153,665	324,779	306,908
Other operating expense	80,424	82,390	167,706	160,237
Interest expense	6,230	5,434	13,139	10,987
Total expense	497,969	487,947	990,532	988,776
Earnings before income taxes	134,319	96,905	251,279	159,784
Income tax expense	40,826	27,427	75,202	43,316
Net earnings	$ 93,493	$ 69,478	$ 176,077	$ 116,468
Earnings per common share
Basic	$ 0.92	$ 0.61	$ 1.71	$ 1.02
Diluted	$ 0.92	$ 0.61	$ 1.71	$ 1.02