Fair Value Measurements (Details) - Forward Contracts - Not Designated as Hedging Instrument - Fair Value, Measurements, Recurring - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Current		$ 1,095	$ 1,137
Derivative Liability, Noncurrent		347	478
Derivative liability for commodity hedges	[1]	1,442	1,615
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability for commodity hedges		0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability for commodity hedges		1,442	1,615
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability for commodity hedges		$ 0	$ 0

[1] As of June 30, 2015 and December 31, 2014 the short-term portion of the derivative liability for commodity hedges of $1,095 and $1,137, respectively, is included in "Accrued and other liabilities" and the long-term portion of $347 and $478, respectively, is included in "Other non-current liabilities" in the Condensed Consolidated Balance Sheet.