Financing Agreements - Margin Based on Remaining Borrowing Availability (Details) - Revolving Facility [Member]	6 Months Ended
	Jun. 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%