Exit Activity Costs and Asset Impairments (Reconciles Of Liability For Exit Activity Costs Relating To Facility Consolidation Efforts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Balance as of	$ 2,083	$ 1,865
Exit activity costs recognized	2,207	5,166	$ 2,801
Cash payments	(3,260)	(3,799)
Non-cash charges	0	(1,149)
Balance as of	$ 1,030	$ 2,083	$ 1,865