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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2015
Fair Value of Financial Instruments [Abstract] |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] | The following tables present our financial assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value.
(In thousands) |  |  |  |  | Fair Value Measurements at December 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 |  | $ | 82,847 |  | $ | — |  | $ | 82,847 |  | $ | — |
Foreign currency forward exchange contracts not accounted for using hedge accounting |  |  | 123 |  |  | — |  |  | 123 |  |  | — |
|  | $ | 82,970 |  | $ | — |  | $ | 82,970 |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | 1,026 |  | $ | — |  | $ | 1,026 |  | $ | — |
|  |  |  |  | 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 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: 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 + Details
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