Reportable Segments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Segment	Sep. 30, 2014 USD ($)
Reportable Segments [Abstract]
Number of reportable segments | Segment			2
Segment Reporting Information [Line Items]
Net Premiums Earned	$ 65,445	$ 65,947	$ 197,340	$ 192,694
Reconciliation from segment totals to consolidated [Abstract]
Income before federal income taxes	11,610	8,548	29,331	32,024
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Direct and Assumed Premium Written	95,952	94,591	285,727	284,443
Net Premiums Earned	65,445	65,947	197,340	192,694
Segment Profit (Loss)	14,599	8,614	32,294	23,922
Reconciliation from segment totals to consolidated [Abstract]
Segment profit	14,599	8,614	32,294	23,922
Reportable Segments [Member] | Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Direct and Assumed Premium Written	92,584	84,644	272,260	253,394
Net Premiums Earned	60,837	57,097	180,152	163,613
Segment Profit (Loss)	14,513	9,520	31,195	23,726
Reconciliation from segment totals to consolidated [Abstract]
Segment profit	14,513	9,520	31,195	23,726
Reportable Segments [Member] | Reinsurance [Member]
Segment Reporting Information [Line Items]
Direct and Assumed Premium Written	3,368	9,947	13,467	31,049
Net Premiums Earned	4,608	8,850	17,188	29,081
Segment Profit (Loss)	86	(906)	1,099	196
Reconciliation from segment totals to consolidated [Abstract]
Segment profit	86	(906)	1,099	196
Segment Reconciling Items [Member]
Reconciliation from segment totals to consolidated [Abstract]
Net investment income	3,014	2,073	8,727	6,456
Net realized gains (losses) on investments	(2,086)	658	491	12,817
Corporate expenses and other	$ (3,917)	$ (2,797)	$ (12,181)	$ (11,171)