Goodwill And Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Goodwill [Line Items]
Balance at beginning of period	$ 32,936
Impairment	(22,004)
Currency translation	(1,144)
Balance at end of period	9,788
United States [Member]
Goodwill [Line Items]
Balance at beginning of period	18,629
Impairment	(18,629)
Currency translation
Canada [Member]
Goodwill [Line Items]
Balance at beginning of period	7,550
Impairment	(3,375)
Currency translation	(577)
Balance at end of period	3,598
Poland [Member]
Goodwill [Line Items]
Balance at beginning of period	6,757
Impairment
Currency translation	(567)
Balance at end of period	$ 6,190