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Debt - Additional Information (Details) - USD ($)
$ in Thousands
Mar. 21, 2017
Sep. 30, 2017
New Revolver    
Debt Instrument [Line Items]    
New credit facility, opening balance   $ 153,000
New Term Loan    
Debt Instrument [Line Items]    
New credit facility, opening balance   $ 148,541
Plan of Reorganization | Prior Credit Facility    
Debt Instrument [Line Items]    
Amount of repayments on prior credit facility $ 444,440  
Plan of Reorganization | New Revolver    
Debt Instrument [Line Items]    
New credit facility, opening balance 120,000  
Plan of Reorganization | New Term Loan    
Debt Instrument [Line Items]    
New credit facility, opening balance $ 150,000