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Goodwill And Intangible Assets (Changes In The Carrying Value Of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Gross carrying value, Beginning	$ 32,936	$ 13,993
Acquisition	1,157	18,629
Currency translation	(31)	314
Gross carrying value, Ending	34,062	32,936
Accumulated impairment losses, Beginning
Impairment	(23,161)
Accumulated impairment losses, Ending	(23,161)
Net carrying value	10,901	32,936
United States [Member]
Goodwill [Line Items]
Gross carrying value, Beginning	18,629
Acquisition	1,157	18,629
Currency translation
Gross carrying value, Ending	19,786	18,629
Accumulated impairment losses, Beginning
Impairment	(19,786)
Accumulated impairment losses, Ending	(19,786)
Net carrying value		18,629
Canada [Member]
Goodwill [Line Items]
Gross carrying value, Beginning	7,550	7,188
Acquisition
Currency translation	(165)	362
Gross carrying value, Ending	7,385	7,550
Accumulated impairment losses, Beginning
Impairment	(3,375)
Accumulated impairment losses, Ending	(3,375)
Net carrying value	4,010	7,550
Poland [Member]
Goodwill [Line Items]
Gross carrying value, Beginning	6,757	6,805
Acquisition
Currency translation	134	(48)
Gross carrying value, Ending	6,891	6,757
Accumulated impairment losses, Beginning
Impairment
Accumulated impairment losses, Ending
Net carrying value	$ 6,891	$ 6,757

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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