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Goodwill And Intangible Assets (Changes In The Carrying Value Of Goodwill) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Dec. 31, 2020
Goodwill [Line Items]    
Gross carrying value, Beginning $ 14,276  
Currency translation (57)  
Gross carrying value, Ending 14,219  
Accumulated impairment losses, Beginning (3,375)  
Accumulated impairment losses, Ending (3,375)  
Net carrying value 10,844 $ 10,901
Canada [Member]    
Goodwill [Line Items]    
Gross carrying value, Beginning 7,385  
Currency translation 109  
Gross carrying value, Ending 7,494  
Accumulated impairment losses, Beginning (3,375)  
Accumulated impairment losses, Ending (3,375)  
Net carrying value 4,119 4,010
Poland [Member]    
Goodwill [Line Items]    
Gross carrying value, Beginning 6,891  
Currency translation (166)  
Gross carrying value, Ending 6,725  
Accumulated impairment losses, Beginning  
Accumulated impairment losses, Ending  
Net carrying value $ 6,725 $ 6,891