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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 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Undistributed earnings:      
Dividend distributions $ (1,387) $ (2,054)  
Foreign currency translation:      
Total investment in BOMAY at end of period 11,608   $ 11,897
Accumulated statutory reserves in equity method investments 2,660   2,660
Accretion of investment 65 86  
Accumulated accretion 248   183
Bomay      
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]      
Initial investment 9,333 9,333 9,333
Undistributed earnings:      
Balance at the beginning of the period 1,908 1,257 1,257
Equity in earnings 959   2,705
Dividend distributions (1,387)   (2,054)
Balance at end of period 1,480   1,908
Foreign currency translation:      
Balance at the beginning of the period 656 $ (69) (69)
Change during the period 139   725
Balance at end of period 795   656
Total investment in BOMAY at end of period $ 11,608   $ 11,897
Ownership percentage 40.00%    
Basis difference $ 1,200    
Remaining life of joint venture 7 years