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Investments in Foreign Joint Ventures - Schedule of Activity in Investment in Foreign Joint Ventures (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Undistributed earnings:      
Dividend distributions $ (2,054) $ 0  
Foreign currency translation:      
Investments in foreign joint ventures 9,174   $ 10,521
Accumulated statutory reserves in equity method investments 2,670    
Accretion of investment 86    
Accumulated accretion 140    
Bomay      
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]      
Balance at the beginning of the year 9,333    
Undistributed earnings:      
Balance at the beginning of the year 1,257    
Equity in earnings 887    
Dividend distributions (2,054)    
Balance at end of period 90    
Foreign currency translation:      
Balance at the beginning of the year (69)    
Change during the period (180)    
Balance at end of period (249)    
Investments in foreign joint ventures $ 9,174    
Ownership percentage 40.00%    
Basis difference $ 1,000    
Remaining life of joint venture 9 years