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Fair Value Measurement (Tables) | 3 Months Ended
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Mar. 31, 2015
Fair Value of Financial Instruments [Abstract] |
Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis |
(In thousands) |  |  |  |  | Fair Value Measurements at March 31, 2015 |
|  |  |  |  | Quoted Prices in |  |  | Significant Other |  |  | Significant |
|  |  |  |  | Active Markets for |  |  | Observable |  |  | Unobservable |
|  |  |  |  | Identical Assets |  |  | Inputs |  |  | Inputs |
|  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term investments |  | $ | 155,938 |  |  | $ | — |  |  | $ | 155,938 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward exchange contracts accounted for using hedge accounting |  | $ | 981 |  |  | $ | — |  |  | $ | 981 |  |  | $ | — |
Foreign currency forward exchange contracts not accounted for using hedge accounting |  |  | 1,241 |  |  |  | — |  |  |  | 1,241 |  |  |  | — |
|  | $ | 2,222 |  |  | $ | — |  |  | $ | 2,222 |  |  | $ | — |
|  |  |  |  | Fair Value Measurements at December 31, 2014 |
|  |  |  |  | Quoted Prices in |  |  | Significant Other |  |  | Significant |
|  |  |  |  | Active Markets for |  |  | Observable |  |  | Unobservable |
|  |  |  |  | Identical Assets |  |  | Inputs |  |  | Inputs |
|  | Total |  |  | (Level 1) |  |  | (Level 2) |  |  | (Level 3) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-term investments |  | $ | 190,152 |  |  | $ | — |  |  | $ | 190,152 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward exchange contracts not accounted for using hedge accounting |  | $ | 355 |  |  | $ | — |  |  | $ | 355 |  |  | $ | — |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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