Goodwill And Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Goodwill [Line Items]
Balance at beginning of period	$ 32,936
Acquisition	1,157
Impairment	(23,161)
Currency translation	(490)
Balance at end of period	10,442
United States [Member]
Goodwill [Line Items]
Balance at beginning of period	18,629
Acquisition	1,157
Impairment	(19,786)
Currency translation
Balance at end of period
Canada [Member]
Goodwill [Line Items]
Balance at beginning of period	7,550
Acquisition
Impairment	(3,375)
Currency translation	(348)
Balance at end of period	3,827
Poland [Member]
Goodwill [Line Items]
Balance at beginning of period	6,757
Acquisition
Impairment
Currency translation	(142)
Balance at end of period	$ 6,615