Business Segments (Long-Lived Assets By Geographical Location) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information
Long-Lived assets	$ 86,857	$ 96,096
United States
Segment Reporting Information
Long-Lived assets	81,135	89,439
United Kingdom
Segment Reporting Information
Long-Lived assets	1,671	1,850
Canada
Segment Reporting Information
Long-Lived assets	4,036	4,788
Other
Segment Reporting Information
Long-Lived assets	$ 15	$ 19