Segment Information (Schedule of Business Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues [Abstract]
Revenues	$ 93,341	$ 96,948
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	809	5,838
Specialty Commercial Segment [Member]
Revenues [Abstract]
Revenues	73,124	65,835
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	9,758	8,098
Standard Commercial Segment [Member]
Revenues [Abstract]
Revenues	18,875	17,726
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	1,319	851
Personal Segment [Member]
Revenues [Abstract]
Revenues	7,620	11,863
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	(22)	(758)
Corporate [Member]
Revenues [Abstract]
Revenues	(6,278)	1,524
Pre-tax income (loss) [Abstract]
Pre-tax income (loss)	$ (10,246)	$ (2,353)