Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues:
Net premiums earned	$ 263,335	$ 261,627	$ 252,743
Net investment income	12,498	9,055	8,770
Commissions and other income	5,703	6,430	5,944
Net realized gains on investments, excluding impairment losses	6,439	15,619	24,257
Total other-than-temporary impairment losses on investments	(7,700)	(689)	(744)
Portion of other-than-temporary impairment losses recognized in other comprehensive income	0	0	2
Net realized gains (losses) on investments	(1,261)	14,930	23,515
Total revenue	280,275	292,042	290,972
Expenses:
Losses and loss expenses incurred	155,750	159,596	150,701
Other operating expenses	90,573	88,048	85,361
Total expenses	246,323	247,644	236,062
Income before federal income taxes	33,952	44,398	54,910
Federal income taxes	10,669	14,681	18,322
Net income	$ 23,283	$ 29,717	$ 36,588
Per share data:
Basic and diluted earnings (in dollars per share)	$ 1.55	$ 1.98	$ 2.45