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Fair Value Measurement (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets:
Short-term investments	$ 151,901	$ 190,152
Foreign currency forward exchange contracts not accounted for using hedge accounting	101
Total assets	152,002
Liabilities:
Interest rate swaps	$ 186
Foreign currency forward exchange contracts not accounted for using hedge accounting		$ 355
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets:
Short-term investments
Foreign currency forward exchange contracts not accounted for using hedge accounting
Total assets
Liabilities:
Interest rate swaps
Foreign currency forward exchange contracts not accounted for using hedge accounting
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Short-term investments	$ 151,901	$ 190,152
Foreign currency forward exchange contracts not accounted for using hedge accounting	101
Total assets	152,002
Liabilities:
Interest rate swaps	$ 186
Foreign currency forward exchange contracts not accounted for using hedge accounting		$ 355
Significant Unobservable Inputs (Level 3) [Member]
Assets:
Short-term investments
Foreign currency forward exchange contracts not accounted for using hedge accounting
Total assets
Liabilities:
Interest rate swaps
Foreign currency forward exchange contracts not accounted for using hedge accounting

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 820



-SubTopic 10



-Section 50



-Paragraph 2



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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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- Definition

Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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