Segment Information (Schedule of Additional Business Segment Information) (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Assets	$ 1,466,003	$ 1,553,598
Specialty Commercial Segment [Member]
Segment Reporting Information [Line Items]
Assets	1,099,819	1,163,947
Standard Commercial Segment [Member]
Segment Reporting Information [Line Items]
Assets	183,849	194,594
Personal Segment [Member]
Segment Reporting Information [Line Items]
Assets	121,022	128,165
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	$ 61,313	$ 66,892