Segment Information (Schedule of Additional Business Segment Information) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Assets	$ 937,456	$ 909,023
Standard Commercial Segment [Member]
Segment Reporting Information [Line Items]
Assets	140,209	142,143
Specialty Commercial Segment [Member]
Segment Reporting Information [Line Items]
Assets	554,475	536,894
Personal Segment [Member]
Segment Reporting Information [Line Items]
Assets	223,218	210,825
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	$ 19,554	$ 19,161