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Financial Instruments and Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Forward Contracts [Member]
Derivatives designated as hedging instruments, Cash Flow Hedges:
Notional Amount of Cash Flow Hedge Instruments	$ 36,500	[1]	$ 55,000	[1]
Derivatives not designated as hedging instruments:
Notional amount of derivatives not designated as hedging instruments	12,643	[1]	25,894	[1]
Commodity Contract [Member]
Derivatives designated as hedging instruments, Cash Flow Hedges:
Notional Amount of Cash Flow Hedge Instruments	2,436	[1]	6,500	[1]
Interest Rate Swap [Member]
Derivatives designated as hedging instruments, Fair Value Hedge:
Notional Amount of Fair Value Hedge Instruments	45,000	[1]	45,000	[1]
Other Assets [Member] | Forward Contracts [Member]
Derivatives not designated as hedging instruments:
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net	0		2
Derivatives designated as hedging instruments, Cash Flow Hedges:
Cash Flow Hedges Derivative Instruments at Fair Value, Net	1,800		0
Other Assets [Member] | Commodity Contract [Member]
Derivatives designated as hedging instruments, Cash Flow Hedges:
Cash Flow Hedges Derivative Instruments at Fair Value, Net	340		0
Other Assets [Member] | Interest Rate Swap [Member]
Derivatives designated as hedging instruments, Fair Value Hedge:
Interest Rate Fair Value Hedge Derivative at Fair Value, Net	2,212		1,078
Other Liabilities [Member] | Forward Contracts [Member]
Derivatives not designated as hedging instruments:
Other Derivatives Not Designated as Hedging Instruments at Fair Value, Net	191		0
Derivatives designated as hedging instruments, Cash Flow Hedges:
Cash Flow Hedges Derivative Instruments at Fair Value, Net	0		4,158
Other Liabilities [Member] | Commodity Contract [Member]
Derivatives designated as hedging instruments, Cash Flow Hedges:
Cash Flow Hedges Derivative Instruments at Fair Value, Net	0		3,564
Other Liabilities [Member] | Interest Rate Swap [Member]
Derivatives designated as hedging instruments, Fair Value Hedge:
Interest Rate Fair Value Hedge Derivative at Fair Value, Net	$ 0		$ 0
[1] Notional amounts represent the gross contract / notional amount of the derivatives outstanding.

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Net fair value of all derivative instruments designated as cash flow hedging instruments, which is ordinarily reflected within other comprehensive income.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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Fair value of all derivatives designated as interest rate fair value hedging instruments.

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