Segment Information (Schedule of Business Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues [Abstract]
Revenues	$ 96,948	$ 90,028
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	5,838	5,989
Specialty Commercial Segment [Member]
Revenues [Abstract]
Revenues	65,835	60,583
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	8,098	10,312
Standard Commercial Segment [Member]
Revenues [Abstract]
Revenues	17,726	17,992
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	851	1,416
Personal Segment [Member]
Revenues [Abstract]
Revenues	11,863	12,090
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	(758)	(1,083)
Corporate [Member]
Revenues [Abstract]
Revenues	1,524	(637)
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	$ (2,353)	$ (4,656)