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Derivatives - Foreign currency agreements-Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Forward Rate Contract Expiration Frequency	Monthly intervals up to February 2016	Monthly intervals up to September 2015
Foreign currency agreements value	$ 23,000		$ 22,500
Gain (Loss) on derivative instruments from forward contracts	$ 519	$ 0
Number of foreign currency agreements (Euro/US dollar contracts)	16		9
Average forward rate	1.112		1.273

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Average contractual rate at which a foreign currency can be purchased or sold.

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Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 50



-Paragraph 4C



-Subparagraph (e)



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Number of foreign currency exchange rate derivatives held by the entity at the reporting date.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 50



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