Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Gross written premiums	$ 396,460	$ 422,790
Revenues:
Net written premiums	288,958	311,850
Change in unearned premiums	(52,826)	(86,578)
Net earned premiums	236,132	225,272
Net investment income	16,253	16,610
Net realized gains (losses)	5,596	833
Other income (expense)	2,242	10,399
Total revenues	260,223	253,114
Expenses:
Net losses and loss adjustment expenses	130,198	135,067
Commission expenses	32,905	25,727
Other operating expenses	54,909	47,146
Interest expense	3,855	3,852
Total expenses	221,867	211,792
Income before income taxes	38,356	41,322
Income tax expense	12,427	13,354
Net income	$ 25,929	$ 27,968
Net income per common share:
Basic	$ 1.81	$ 1.96
Diluted	$ 1.77	$ 1.94
Average common shares outstanding:
Basic	14,327,606	14,233,504
Diluted	14,637,837	14,408,416