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Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended						3 Months Ended
	Mar. 31, 2013 DerivativeContract	Mar. 31, 2012	Dec. 31, 2012	Feb. 09, 2012 Tranche A term loan [Member]	Feb. 09, 2012 Tranche B term loan [Member]	Feb. 09, 2012 Credit Agreement [Member]	Mar. 31, 2013 Commodity contracts [Member] DerivativeContract	Feb. 28, 2013 Commodity contracts [Member]	Dec. 31, 2012 Commodity contracts [Member] DerivativeContract	Oct. 31, 2012 Commodity contracts [Member]	Mar. 31, 2012 Commodity contracts [Member] DerivativeContract	Sep. 30, 2011 Commodity forward contract one [Member]	Oct. 01, 2012 Commodity forward contract two [Member]	Sep. 30, 2011 Commodity forward contract two [Member]	Jul. 01, 2012 Interest rate swap one [Member]	Mar. 31, 2013 Foreign Exchange Contract [Member] DerivativeContract	Mar. 31, 2012 Foreign Exchange Contract [Member] DerivativeContract	Mar. 31, 2013 Derivatives not designated as hedging instruments [Member]	Dec. 31, 2012 Derivatives not designated as hedging instruments [Member]	Mar. 31, 2013 Derivatives not designated as hedging instruments [Member] Interest rate swaps [Member]	Dec. 31, 2012 Derivatives not designated as hedging instruments [Member] Interest rate swaps [Member]	Mar. 31, 2013 Derivatives not designated as hedging instruments [Member] Commodity contracts [Member]	Dec. 31, 2012 Derivatives not designated as hedging instruments [Member] Commodity contracts [Member]
Derivative [Line Items]
Maturity period of contracts, maximum (in months)							12 months
Number of outstanding contracts	3						3		1		2					1	3
Derivative, notional amount							$ 2,636	$ 2,677		$ 3,472		$ 4,533	$ 100,000	$ 1,935	$ 200,000
Total gains or losses recognized	292	420
Derivative, fixed rate (in hundredths)													2.22%		1.905%
Maximum borrowing capacity				325,000	250,000	150,000
Net derivatives liability																		(1,992)	(2,862)	(1,766)	(2,973)	(226)	111
Fair value of derivative contracts excluding impact of credit risk	$ (2,036)		$ (2,936)

X

- Definition

Fair value derivative contracts excluding impact of credit risk.

+ References

No definition available.

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X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958



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-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

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-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611



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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

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- Definition

High end period remaining until maturity for the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

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-Topic 815

-SubTopic 10

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-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.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Topic 210

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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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-Name Regulation S-X (SX)

-Number 210

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- Definition

Tax effect of the income statement impact of the reclassification adjustment for unrealized gain (loss) realized upon the sale of available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 25

-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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-Name Accounting Research Bulletin (ARB)

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