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Goodwill and Intangible Assets Intangible Assets Changes in Carrying Amount (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Finite-lived Intangible Assets [Roll Forward]        
Beginning balance     $ 4,943  
Amortization expense $ (241) $ (247) (489) $ (495)
Intangible assets acquired in asset acquisition     40  
Foreign currency translation adjustment     (299)  
Ending balance $ 4,195   $ 4,195