Debt and Credit Facilities - Margin for Borrowings under Revolving Credit Facility (Details) - Revolving Credit Facility - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Average Daily Availability	$ 37,500,000	$ 37,500,000
Level III | Minimum
Debt Instrument [Line Items]
Average Daily Availability	$ 20,000,000
Level III | Base Rate Loans
Debt Instrument [Line Items]
Loans rate	0.50%
Level III | LIBOR Revolver Loans
Debt Instrument [Line Items]
Loans rate	1.50%
Level II | Minimum
Debt Instrument [Line Items]
Average Daily Availability	$ 10,000,000
Level II | Maximum
Debt Instrument [Line Items]
Average Daily Availability	$ 20,000,000
Level II | Base Rate Loans
Debt Instrument [Line Items]
Loans rate	0.75%
Level II | LIBOR Revolver Loans
Debt Instrument [Line Items]
Loans rate	1.75%
Level I | Maximum
Debt Instrument [Line Items]
Average Daily Availability	$ 10,000,000
Level I | Base Rate Loans
Debt Instrument [Line Items]
Loans rate	1.00%
Level I | LIBOR Revolver Loans
Debt Instrument [Line Items]
Loans rate	2.00%