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Fair Value Measurement (Tables) | 12 Months Ended
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Dec. 31, 2017
Fair Value Disclosures [Abstract] |
Schedule of fair value for forward foreign exchange contracts | We record these forward foreign exchange contracts at fair value; the following tables summarize the fair value for forward foreign exchange contracts outstanding at December 31, 2017 and 2016:
December 31, 2017 | Asset Fair Value |  | Liabilities Fair Value |  | Net Fair Value
Derivatives designated as hedging instruments: |  |  |  |  |
Foreign exchange contracts | $ | 346 |  |  | $ | (5,945 | ) |  | $ | (5,599 | )
Derivatives not designated as hedging instruments: |  |  |  |  |  |  |  |
Foreign exchange contracts | 4 |  |  | (78 | ) |  | (74 | )
Total derivatives | $ | 350 |  |  | $ | (6,023 | ) |  | $ | (5,673 | )
December 31, 2016 | Asset Fair Value |  | Liabilities Fair Value |  | Net Fair Value
Derivatives designated as hedging instruments: |  |  |  |  |
Foreign exchange contracts | $ | 3,962 |  |  | $ | (1,510 | ) |  | $ | 2,452 |
Derivatives not designated as hedging instruments: |  |  |  |  |
Foreign exchange contracts | 48 |  |  | (54 | ) |  | (6 | )
Total derivatives | $ | 4,010 |  |  | $ | (1,564 | ) |  | $ | 2,446 |

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- Definition Tabular disclosure of the presentation of foreign exchange contracts on the statement of financial position, including the fair value amounts and location of such amounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 + Details
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