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Basis of Presentation and Nature of Operations (Details) - USD ($)
Oct. 02, 2018
Sep. 30, 2018
Apr. 11, 2018
Dec. 31, 2017
Oct. 27, 2017
Sep. 30, 2017
Debt Instrument [Line Items]            
Cash and cash equivalents   $ 30,847,000   $ 38,520,000   $ 43,168,000
Restricted cash   44,997,000   47,703,000   $ 47,680,000
Subsequent Event            
Debt Instrument [Line Items]            
Repayment of debt, penalty $ 17,500,000          
Senior Notes | Subsequent Event            
Debt Instrument [Line Items]            
Aggregate principal amount $ 300,000,000.0          
Stated interest rate 10.75%          
Debt discount percentage 99.042%          
ABL Facility            
Debt Instrument [Line Items]            
Maximum borrowing capacity   150,000,000.0 $ 150,000,000   $ 120,000,000  
Line of credit borrowings   $ 90,000,000   $ 64,000,000    
ABL Facility | Subsequent Event            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 150,000,000.0