Reportable Segments (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Segment	Sep. 30, 2015 USD ($)
Reportable Segments [Abstract]
Number of reportable segments | Segment			2
Segment Reporting Information [Line Items]
Net Premium Earned	$ 71,235	$ 65,445	$ 206,870	$ 197,340
Reconciliation from segment totals to consolidated [Abstract]
Income before federal income taxes	5,635	11,610	35,988	29,331
Reportable Segments [Member]
Segment Reporting Information [Line Items]
Gross Premiums Written	101,921	95,952	298,120	285,727
Net Premium Earned	71,235	65,445	206,870	197,340
Segment Underwriting Gain (Loss)	(4,845)	10,532	7,601	19,777
Reconciliation from segment totals to consolidated [Abstract]
Segment underwriting gain (loss)	(4,845)	10,532	7,601	19,777
Reportable Segments [Member] | Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Gross Premiums Written	100,467	92,584	291,929	272,260
Net Premium Earned	68,828	60,837	197,970	180,152
Segment Underwriting Gain (Loss)	2,009	10,446	15,281	18,678
Reconciliation from segment totals to consolidated [Abstract]
Segment underwriting gain (loss)	2,009	10,446	15,281	18,678
Reportable Segments [Member] | Reinsurance [Member]
Segment Reporting Information [Line Items]
Gross Premiums Written	1,454	3,368	6,191	13,467
Net Premium Earned	2,407	4,608	8,900	17,188
Segment Underwriting Gain (Loss)	(6,854)	86	(7,680)	1,099
Reconciliation from segment totals to consolidated [Abstract]
Segment underwriting gain (loss)	(6,854)	86	(7,680)	1,099
Segment Reconciling Items [Member]
Reconciliation from segment totals to consolidated [Abstract]
Net investment income	3,513	3,014	10,501	8,727
Net realized gains (losses) on investments	7,732	(2,086)	17,024	491
Corporate expenses and other	$ (765)	$ 150	$ 862	$ 336