Fair Value Measurements (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Line of Credit Facility, Fair Value of Amount Outstanding		$ 68,300
Long-term Line of Credit		68,300	$ 59,200
Forward Contracts | Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Current		415	1,137
Derivative Liability, Noncurrent		887	478
Derivative liability for commodity hedges	[1]	1,302	1,615
Forward Contracts | Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability for commodity hedges		0	0
Forward Contracts | Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability for commodity hedges		1,302	1,615
Forward Contracts | Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring | 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 September 30, 2015 and December 31, 2014 the short-term portion of the derivative liability for commodity hedges of $415 and $1,137, respectively, is included in accrued and other current liabilities and the long-term portion of $887 and $478, respectively, is included in other non-current liabilities in the Condensed Consolidated Balance Sheets.