Accumulated Other Comprehensive Income (Classification Included Within AOCI On The Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	$ 91,199	$ 90,492	$ 91,974	$ 21,439
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(344)	(403)
Pension And Postretirement Obligations [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	(335)	(117)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total	$ (679)	$ (520)	$ (927)	$ (733)