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Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($)
Sep. 30, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 0  
Total intangible assets 5,500,000  
Trade name    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization: 5,500,000  
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization: 0  
Accumulated Amortization $ 0  
Predecessor    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization   $ 63,216,000
Total intangible assets   67,317,000
Predecessor | Trade name    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization:   0
Predecessor | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization:   67,317,000
Accumulated Amortization   $ 63,216,000