Derivatives and Hedging Activities (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Foreign Exchange Forward
Derivative [Line Items]
Derivative, Lower Remaining Maturity Range	5 days
Derivative, Upper Remaining Maturity Range	37 months
Interest Rate Swap Agreements
Derivative [Line Items]
Maximum remaining length of interest rate swap contract	6 months
Designated as Hedging Instrument \| Foreign Exchange Forward
Derivative [Line Items]
Derivative, notional amount	125.9	$ 6.2
Designated as Hedging Instrument \| Interest Rate Swap Agreements
Derivative [Line Items]
Derivative, notional amount	40.0	140.0
Not Designated as a Hedging Instrument \| Foreign Exchange Forward
Derivative [Line Items]
Derivative, notional amount	421.1	$ 610.7

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

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

+ Details

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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

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Maximum period the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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