Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Gross written premiums	$ 348,795	$ 332,128	$ 771,585	$ 725,350
Revenues:
Net written premiums	231,864	198,469	543,714	467,921
Change in unearned premiums	(780)	7,345	(87,358)	(59,779)
Net earned premiums	231,084	205,814	456,356	408,142
Net investment income	15,648	14,246	32,258	27,903
Total other-than-temporary impairment losses				(42)
Portion of loss recognized in other comprehensive income (before tax)
Net other-than-temporary impairment losses recognized in earnings				(42)
Net realized gains (losses)	4,473	3,345	5,306	8,159
Other income (expense)	(1,665)	(915)	8,734	(297)
Total revenues	249,540	222,490	502,654	443,865
Expenses:
Net losses and loss adjustment expenses	140,220	131,148	275,287	262,490
Commission expenses	32,150	28,391	57,877	54,946
Other operating expenses	47,992	40,678	95,138	81,552
Interest expense	4,319	2,052	8,171	4,103
Total expenses	224,681	202,269	436,473	403,091
Income (loss) before income taxes	24,859	20,221	66,181	40,774
Income tax expense (benefit)	7,998	6,284	21,352	12,927
Net income	$ 16,861	$ 13,937	$ 44,829	$ 27,847
Net income per common share:
Basic	$ 1.18	$ 0.99	$ 3.15	$ 1.97
Diluted	$ 1.17	$ 0.97	$ 3.11	$ 1.93
Average common shares outstanding:
Basic	14,259,753	14,131,422	14,246,701	14,108,747
Diluted	14,377,476	14,428,117	14,401,740	14,434,232