Reportable Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)
Reportable Segments [Abstract]
Number of reportable segments | Segment			2
Segment Reporting Information [Line Items]
Net Premiums Earned	$ 65,449	$ 62,905	$ 131,895	$ 126,747
Reconciliation from segment totals to consolidated [Abstract]
Income before federal income taxes	8,430	14,037	17,721	23,476
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Direct and Assumed Premium Written	92,795	95,098	189,775	189,852
Net Premiums Earned	65,449	62,905	131,895	126,747
Segment Profit (Loss)	10,771	8,078	17,695	15,309
Reconciliation from segment totals to consolidated [Abstract]
Segment profit	10,771	8,078	17,695	15,309
Reportable Segments [Member] | Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Direct and Assumed Premium Written	89,163	85,826	179,676	168,750
Net Premiums Earned	60,031	55,057	119,315	106,516
Segment Profit (Loss)	10,358	8,864	16,682	14,207
Reconciliation from segment totals to consolidated [Abstract]
Segment profit	10,358	8,864	16,682	14,207
Reportable Segments [Member] | Reinsurance [Member]
Segment Reporting Information [Line Items]
Direct and Assumed Premium Written	3,632	9,272	10,099	21,102
Net Premiums Earned	5,418	7,848	12,580	20,231
Segment Profit (Loss)	413	(786)	1,013	1,102
Reconciliation from segment totals to consolidated [Abstract]
Segment profit	413	(786)	1,013	1,102
Segment Reconciling Items [Member]
Reconciliation from segment totals to consolidated [Abstract]
Net investment income	2,898	2,090	5,713	4,383
Net realized gains (losses) on investments	(1,166)	8,089	2,577	12,159
Corporate expenses and other	$ (4,073)	$ (4,220)	$ (8,264)	$ (8,375)