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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Assets: |  |  |
Foreign currency forward exchange contracts |  | $ 388 |
Liabilities: |  |  |
Foreign currency forward exchange contracts |  | 404 |
Gain (loss) on forward exchange contracts | 1,068 | 1,026 | (1,444)
Notional amount of foreign currency derivatives | 30,280 | 42,475 |
Fair Value |  |  |
Assets: |  |  |
Foreign currency forward exchange contracts | 16 |  |
Total Assets | 16 |  |
Liabilities: |  |  |
Foreign currency forward exchange contracts | 109 |  |
Total Liabilities | 109 |  |
Level 1 |  |  |
Assets: |  |  |
Foreign currency forward exchange contracts | 0 |  |
Total Assets | 0 |  |
Liabilities: |  |  |
Foreign currency forward exchange contracts | 0 |  |
Total Liabilities | 0 |  |
Level 2 |  |  |
Assets: |  |  |
Foreign currency forward exchange contracts | 16 |  |
Total Assets | 16 |  |
Liabilities: |  |  |
Foreign currency forward exchange contracts | 109 |  |
Total Liabilities | 109 |  |
Level 3 |  |  |
Assets: |  |  |
Foreign currency forward exchange contracts | 0 |  |
Total Assets | 0 |  |
Liabilities: |  |  |
Foreign currency forward exchange contracts | 0 |  |
Total Liabilities | $ 0 |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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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=25499696&loc=d3e19207-110258 + Details
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- Definition Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps. + References No definition available. + Details
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- Definition Aggregate impact of foreign currency derivatives on earnings for the period. Includes impact of foreign currency cash flow hedge ineffectiveness and the ineffectiveness of fair value hedging derivatives and full change in fair value of the foreign currency derivatives not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624177-113959 + Details
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