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Summary of Significant Accounting Policies (Acquisitions Narrative) (Details)
€ in Thousands, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2017
USD ($)
Jan. 31, 2017
EUR (€)
Mar. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Mar. 31, 2018
EUR (€)
Jan. 31, 2017
EUR (€)
Business Acquisition [Line Items]                  
Earn-out consideration, operating and financing activities     $ 8,474            
Payment of earn-out consideration paid within operating activities       $ (3,196) $ 2,308 $ 213      
Earn-out consideration cash payment within financing activities         3,394        
Orlaco [Member]                  
Business Acquisition [Line Items]                  
Cash $ 79,675 € 74,939              
Cash paid to seller at closing $ 71,701               € 67,439
Acquisition payment held in escrow to secure payment for working capital and other adjustments | €                 € 7,500
Expense related to fair value adjustment for earn-out consideration           $ 369      
Orlaco [Member]                  
Business Acquisition [Line Items]                  
Earn-out consideration             $ 7,500 € 7,500  
Payment of earn-out consideration paid within operating activities         5,080        
Earn-out consideration cash payment within financing activities         $ 3,394