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Joint Venture - Summary of Related Party Activity, Joint-Venture, Activity (Details) - USD ($)
$ in Thousands
4 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2017
Aug. 31, 2017
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Equity in losses of joint venture $ 0    
Predecessor      
Schedule of Equity Method Investments [Line Items]      
Equity in losses of joint venture   $ 0 $ (4,177)
Investment in joint venture     0
Predecessor | Corporate Joint Venture      
Schedule of Equity Method Investments [Line Items]      
Sales to joint venture     188
Purchases from joint venture     $ 4