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Financing Agreements - Margin Based on Remaining Borrowing Availability (Details) - Revolving Facility [Member]
9 Months Ended
Sep. 30, 2015
Base Rate [Member] | Greater than $350 [Member]  
Debt Instrument [Line Items]  
Margin rate 0.50%
Base Rate [Member] | Greater than $150 but less than or equal to $350 [Member]  
Debt Instrument [Line Items]  
Margin rate 0.75%
Base Rate [Member] | $150 or less [Member]  
Debt Instrument [Line Items]  
Margin rate 1.00%
LIBOR Rate [Member] | Greater than $350 [Member]  
Debt Instrument [Line Items]  
Margin rate 1.50%
LIBOR Rate [Member] | Greater than $150 but less than or equal to $350 [Member]  
Debt Instrument [Line Items]  
Margin rate 1.75%
LIBOR Rate [Member] | $150 or less [Member]  
Debt Instrument [Line Items]  
Margin rate 2.00%