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Long-Term Debt (Narrative) (Details)
Sep. 30, 2017
USD ($)
2012 ABL Revolver | Revolving Credit Facility  
Debt Instrument [Line Items]  
Line of credit facility, amount outstanding $ 90,000,000.0
Line of credit facility, additional borrowing capacity $ 85,000,000.0
Senior Notes | 2016 Senior Notes  
Debt Instrument [Line Items]  
Debt instrument, stated interest rate (percent) 6.375%
Senior Notes | 2013 Senior Notes  
Debt Instrument [Line Items]  
Debt instrument, stated interest rate (percent) 5.375%