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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2016
Oct. 01, 2016
Dec. 31, 2017
Dec. 31, 2015
Predecessor        
Commitments and Contingencies Disclosure [Line Items]        
Employee termination benefits   $ 18,356   $ 12,451
Successor        
Commitments and Contingencies Disclosure [Line Items]        
Employee termination benefits $ 12,334   $ 4,815  
Employee Severance | Predecessor        
Commitments and Contingencies Disclosure [Line Items]        
Employee termination benefits   $ 18,400   $ 12,500
Employee Severance | Successor        
Commitments and Contingencies Disclosure [Line Items]        
Employee termination benefits $ 12,300   $ 4,800