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Related Party Transactions - Transactions with Joint Ventures (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2015
Related Party Transaction [Line Items]          
Other expense (income), net     $ 1 $ (1,240)  
Corporate Joint Venture          
Related Party Transaction [Line Items]          
Other expense (income), net     $ 100 $ (300)  
Green Power | Corporate Joint Venture          
Related Party Transaction [Line Items]          
Investment amount with related party $ 900        
Percent of noncontrolling interest 50.00%        
Doosan-PSI, LLC | Corporate Joint Venture          
Related Party Transaction [Line Items]          
Investment amount with related party         $ 1,000
Percent of noncontrolling interest         50.00%
Cash distribution from joint venture   $ 2,200      
MAT-PSI Holdings, LLC | Green Power | Corporate Joint Venture          
Related Party Transaction [Line Items]          
Ownership percentage 100.00%