Consolidated Statement of Earnings (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
REVENUE
Net earned premium	$ 572,248	$ 561,356	$ 1,134,860	$ 1,122,542
Net investment income	56,438	55,668	113,244	111,433
Other operating income	9,983	7,784	19,249	16,629
Net realized investment gain	4,905	4,623	25,151	13,193
Total revenue	643,574	629,431	1,292,504	1,263,797
EXPENSE
Loss and loss adjustment expense, net	327,094	339,474	648,938	672,171
Policy acquisition costs, net	72,970	70,796	142,011	137,745
Other operating expense	99,001	87,719	194,955	164,572
Interest expense	6,865	6,611	13,984	13,082
Total expense	505,930	504,600	999,888	987,570
Earnings before income taxes	137,644	124,831	292,616	276,227
Income tax expense	40,508	36,669	87,569	82,215
Net earnings	$ 97,136	$ 88,162	$ 205,047	$ 194,012
Earnings per common share
Basic	$ 0.97	$ 0.88	$ 2.05	$ 1.93
Diluted	$ 0.97	$ 0.87	$ 2.04	$ 1.92