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Investments in Foreign Joint Ventures - Schedule of Activity in Investment in Foreign Joint Ventures (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Foreign currency translation:      
Investments in foreign joint ventures $ 12,256   $ 11,897
Accumulated statutory reserves in equity method investments 2,660   2,660
Accretion of investment 32 $ 43  
Accumulated accretion 215   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 421   2,705
Dividend distributions 0   (2,054)
Balance at end of period 2,329   1,908
Foreign currency translation:      
Balance at the beginning of the period 656 $ (69) (69)
Change during the period (62)   725
Balance at end of period 594   656
Investments in foreign joint ventures $ 12,256   $ 11,897
Ownership percentage 40.00%    
Basis difference $ 1,200    
Remaining life of joint venture 8 years