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Long-term Debt (Details 3)
$ in Millions
12 Months Ended
Sep. 30, 2015
USD ($)
ABL Revolver  
Long-term debt  
Revolving credit arrangement amount outstanding $ 0.0
Maximum borrowing capacity 70.0
Current borrowing capacity $ 60.4
Line of credit facility, interest rate at period end (as a percent) 1.80%
Termination date based on the earliest maturity date of the specified long-term debt 3 months
ABL Revolver | Minimum  
Long-term debt  
Line of credit facility unused capacity commitment fee percentage 0.25%
Specified percentage of availability below which a monthly fixed charge coverage ratio applies 12.50%
Coverage ratio 1.0
ABL Revolver | Maximum  
Long-term debt  
Line of credit facility unused capacity commitment fee percentage 0.375%
ABL Revolver | London Interbank Offered Rate (LIBOR)  
Long-term debt  
Variable interest rate base LIBOR
Percentage points added to the reference rate, one 1.50%
Percentage points added to the reference rate, two 1.75%
Percentage points added to the reference rate, three 2.00%
ABL Revolver | Base Rate  
Long-term debt  
Variable interest rate base Base Rate
Percentage points added to the reference rate, one 0.25%
Percentage points added to the reference rate, two 0.50%
Percentage points added to the reference rate, three 0.75%
ABL Revolver | Prime Rate  
Long-term debt  
Variable interest rate base prime rate
ABL Revolver | Federal funds rate  
Long-term debt  
Variable interest rate base federal funds rate
Interest rate margin (as a percent) 0.50%
ABL Revolver | Thirty Day LIBO  
Long-term debt  
Variable interest rate base 30-day LIBO
Interest rate margin (as a percent) 1.00%
Letter of Credit  
Long-term debt  
Maximum borrowing capacity $ 35.0
Outstanding standby letters of credit 7.6
Swingline Facility  
Long-term debt  
Maximum borrowing capacity $ 10.5