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Noncontrolling Interests (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended
Jan. 07, 2020
Jan. 21, 2019
Jul. 19, 2017
Mar. 31, 2019
Dec. 31, 2019
Apr. 02, 2015
Subsequent Event            
Business Acquisition [Line Items]            
Payments for Repurchase of Redeemable Noncontrolling Interest $ 10,000          
Robtec            
Business Acquisition [Line Items]            
Ownership percentage         70.00%  
Robtec | Subsequent Event            
Business Acquisition [Line Items]            
Ownership percentage 100.00%          
Easyway            
Business Acquisition [Line Items]            
Acquired ownership percentage   30.00% 5.00%   100.00% 65.00%
Value of voting rights acquired   $ 13,500 $ 2,300      
Purchase of noncontrolling interest       $ 2,500