Consolidated Statement of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
REVENUE
Net earned premium	$ 561,356	$ 565,331	$ 1,122,542	$ 1,112,472
Other revenue	68,075	66,957	141,255	129,339
Net investment income	55,668	53,290	111,433	110,300
Other operating income	7,784	7,188	16,629	12,389
Net realized investment gain	4,623	6,876	13,193	7,047
Other-than-temporary impairment credit losses	0	(397)	0	(397)
Total revenue	629,431	632,288	1,263,797	1,241,811
EXPENSE
Loss and loss adjustment expense, net	339,474	336,825	672,171	665,753
Policy acquisition costs, net	70,796	74,490	137,745	143,934
Other expense	165,126	161,144	315,399	324,779
Other operating expense	87,719	80,424	164,572	167,706
Interest expense	6,611	6,230	13,082	13,139
Total expense	504,600	497,969	987,570	990,532
Earnings before income taxes	124,831	134,319	276,227	251,279
Income tax expense	36,669	40,826	82,215	75,202
Net earnings	$ 88,162	$ 93,493	$ 194,012	$ 176,077
Earnings per common share
Basic	$ 0.88	$ 0.92	$ 1.93	$ 1.71
Diluted	$ 0.87	$ 0.92	$ 1.92	$ 1.71