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Fair Value Measurements (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Fair Value Disclosures (Additional Textual) [Abstract]
Derivative instrument Maturity year lower range	2010-02
Derivative instrument Maturity year upper range	2012-02
Loss recognized in earnings	$ 0.1	$ 0.1
Expected unrealized gain to be reclassified into earnings	0.1
Interest rate swaps [Member]
Fair Value Measurements (Textual) [Abstract]
Notional Amount of Interest Rate Derivatives	50.0
Commodity contracts [Member]
Fair Value Measurements (Textual) [Abstract]
Unrealized gain on commodity hedges		$ 0.2

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- Definition

Derivative instrument maturity year lower range.

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Derivative instrument maturity year upper range.

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- Definition

The effective portion of gain reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The effective portion of gains on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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The portion of losses on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments.

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