Unaudited Consolidated Statements of Operations (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
Revenues
Net premiums earned	$ 61,775	$ 59,655	$ 122,873	$ 121,206
Net investment income	1,985	2,431	4,395	4,853
Commissions and other income	1,539	1,623	2,922	3,128
Net realized gains on investments, excluding impairment losses	787	(5,108)	15,140	272
Total other-than-temporary impairment losses on investments	(68)	(345)	(74)	(345)
Net realized gains (losses) on investments	719	(5,453)	15,066	(73)
Total revenue	66,018	58,256	145,256	129,114
Expenses
Losses and loss expenses incurred	38,343	33,739	72,876	68,643
Other operating expenses	20,413	19,257	42,439	38,213
Total expenses	58,756	52,996	115,315	106,856
Income before federal income taxes	7,262	5,260	29,941	22,258
Federal income taxes	2,355	1,210	10,091	6,702
Net income	$ 4,907	$ 4,050	$ 19,850	$ 15,556
Per share data:
Basic and diluted earnings (in dollars per share)	$ 0.33	$ 0.27	$ 1.33	$ 1.05
Dividends paid to shareholders (in dollars per share)	$ 0.25	$ 0.25	$ 0.50	$ 0.50
Reconciliation of shares outstanding:
Average shares outstanding - basic (in shares)	14,910	14,837	14,894	14,832
Dilutive effect of share equivalents (in shares)	8	23	24	24
Average shares outstanding - diluted (in shares)	14,918	14,860	14,918	14,856