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Derivative Instruments (Details Textual) In Millions, unless otherwise specified	Dec. 31, 2011 USD ($)	Dec. 31, 2011 EUR (€)	Dec. 31, 2010 USD ($)
Derivatives Instruments (Textual) [Abstract]
Minimum variable interest rate on Debt	0.30%	0.30%
Maximum variable interest rate on Debt	2.75%	2.75%
Reduced Principal amount denominated Interest rate swaps	$ 90.9	€ 70.1
Derivative Fair value Liabilities, net	$ (0.6)		$ (10.0)

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- Details

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- Definition

Reduced principal amount of euro denominated interest rate swaps.

+ References

No definition available.

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- Definition

High end of the range of percentage points added to the reference rate to compute the variable rate on the group of interest rate derivatives.

+ References

No definition available.

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- Definition

Fair value as of the balance sheet date of the gross assets less the gross liabilities of a derivative liability or group of derivative liabilities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13495-108611



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958



Reference 3: 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



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13433-108611

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- Definition

Low end of the range of percentage points added to the reference rate to compute the variable rate on the group of interest rate derivatives.

+ References

No definition available.

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