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Goodwill And Intangible Assets (Changes In The Carrying Amount Of Goodwill) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Line Items]    
Balance at beginning of period $ 13,993 $ 15,162
Acquisitions 18,629
Currency translation 314 (1,169)
Balance at end of period 32,936 13,993
United States [Member]    
Goodwill [Line Items]    
Balance at beginning of period
Acquisitions 18,629
Currency translation
Balance at end of period 18,629
Canada [Member]    
Goodwill [Line Items]    
Balance at beginning of period 7,188 7,817
Acquisitions
Currency translation 362 (629)
Balance at end of period 7,550 7,188
Poland [Member]    
Goodwill [Line Items]    
Balance at beginning of period 6,805 7,345
Acquisitions
Currency translation (48) (540)
Balance at end of period $ 6,757 $ 6,805