Debt - Financial Covenants and Borrowing Limitations (Details)
9 Months Ended
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Apr. 15, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]        
Repayments of Long-term Lines of Credit $ 176,428,000 $ 81,647,000    
Proceeds from revolving credit facility 118,533,000 $ 0    
Long-term debt, gross 469,904,000     $ 520,627,000
Asset Based Revolving Credit Facility        
Debt Instrument [Line Items]        
Long-term debt, gross 43,937,000     101,832,000
Line of credit facility, maximum borrowing capacity 150,000,000.0      
2018 Notes        
Debt Instrument [Line Items]        
Long-term debt, gross $ 40,436,000     $ 400,000,000
Debt instrument fixed charge coverage ratio minimum 2.0      
Face amount     $ 40,400,000  
Asset Based Revolving Credit Facility Amendment Four        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity $ 85,000,000.0      
Senior Loans        
Debt Instrument [Line Items]        
Line of credit facility, maximum borrowing capacity 150,000,000.0      
Asset Based Loan Facility        
Debt Instrument [Line Items]        
Unused borrowing capacity 8,300,000      
Increase (decrease) in borrowing capacity (12,500,000.0)      
Asset Based Loan Facility | Credit Agreement        
Debt Instrument [Line Items]        
Increase (decrease) in borrowing capacity 21,000,000      
Asset Based Loan Facility | Wells Fargo Bank | Credit Agreement        
Debt Instrument [Line Items]        
Repayments of Long-term Lines of Credit 176,400,000      
Proceeds from revolving credit facility 118,500,000      
Line of credit facility, increase (decrease) $ (57,900,000)