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Financial Instruments and Fair Value Measurements (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Financial assets carried at fair value: |  |
Forward currency asset contracts | $ 786 |
Total financial assets carried at fair value | 786 |
Financial liabilities carried at fair value: |  |
Forward currency liabilities contracts | 68 | $ 269
Earn-out consideration | 21,905 | 20,746
Total financial liabilities carried at fair value | 21,973 | $ 21,015
Fair Value, Inputs, Level 2 [Member] |  |
Financial assets carried at fair value: |  |
Forward currency asset contracts | 786 |
Total financial assets carried at fair value | 786 |
Financial liabilities carried at fair value: |  |
Forward currency liabilities contracts | 68 |
Total financial liabilities carried at fair value | 68 |
Fair Value, Inputs, Level 3 [Member] |  |
Financial liabilities carried at fair value: |  |
Earn-out consideration | 21,905 |
Total financial liabilities carried at fair value | $ 21,905 |

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- 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 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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