Segment Information (Schedule of Additional Business Segment Information) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Assets	$ 1,139,083	$ 1,075,547
Specialty Commercial Segment [Member]
Segment Reporting Information [Line Items]
Assets	719,214	660,263
Standard Commercial Segment [Member]
Segment Reporting Information [Line Items]
Assets	161,943	156,722
Personal Segment [Member]
Segment Reporting Information [Line Items]
Assets	238,836	239,632
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	$ 19,090	$ 18,930