Fair Value Measurements (Details) (Forward Contracts, Not Designated as Hedging Instrument, Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Current	$ 1,093		$ 1,137
Derivative Liability, Noncurrent	419		478
Derivative liability for commodity hedges	1,512	[1]	1,615	[1]
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	1,512		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 March 31, 2015 and December 31, 2014 the short-term portion of the derivative liability for commodity hedges of $1,093 and $1,137, respectively, is included in "Accrued and other liabilities" and the long-term portion of $419 and $478, respectively, is included in "Other non-current liabilities" in the Condensed Consolidated Balance Sheet.