Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues
Gross premiums written	$ 85,476	$ 72,916	$ 170,400	$ 144,275
Ceded premiums written	(3,971)	(3,388)	(7,875)	(6,970)
Net premiums written	81,505	69,528	162,525	137,305
Net premiums earned	69,733	60,261	139,523	120,350
Net investment income	6,605	6,597	13,519	13,143
Net realized gains on investments	137	145	1,928	248
Fee and other income	162	48	321	269
Total revenues	76,637	67,051	155,291	134,010
Expenses
Loss and loss adjustment expenses incurred	56,720	46,576	108,563	90,752
Underwriting and certain other operating costs	4,923	5,561	9,210	10,728
Commissions	5,399	4,497	10,694	8,783
Salaries and benefits	5,025	4,841	10,158	9,947
Interest expense	207	380	486	759
Policyholder dividends	330	364	714	719
Total expenses	72,604	62,219	139,825	121,688
Income before income taxes	4,033	4,832	15,466	12,322
Income tax expense	588	238	2,460	1,098
Net income	3,445	4,594	13,006	11,224
Net income available to common shareholders	$ 3,445	$ 4,594	$ 13,006	$ 11,224
Earnings per share
Basic	$ 0.19	$ 0.25	$ 0.72	$ 0.61
Diluted	$ 0.19	$ 0.24	$ 0.70	$ 0.60
Shares used in computing earnings per share
Basic	18,150,062	18,392,207	18,145,404	18,312,843
Diluted	18,572,058	18,846,466	18,554,921	18,774,376