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Derivative Financial Instruments (Details) | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2012 Foreign exchange contracts [Member] | Dec. 31, 2013 Foreign exchange contracts [Member] USD ($) | Dec. 31, 2013 Foreign exchange contracts [Member] GBP (£) | Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Interest rate swaps [Member] Interest expense [Member] USD ($) | Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Interest rate swaps [Member] Interest expense [Member] USD ($) | Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Foreign exchange contracts [Member] Gain (loss) on foreign currency [Member] USD ($) | Dec. 31, 2012 Not Designated as Hedging Instrument [Member] Foreign exchange contracts [Member] Gain (loss) on foreign currency [Member] USD ($)
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |
Amount of gain (loss) recognized in income on derivative |  |  |  |  | $ 68,000 | $ 11,000 | $ 153,000
Notional amount |  | $ 8,300,000 | £ 2,100,000 |  |  |  |
Maximum maturity period | 1 year |  |  |  |  |  |

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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 Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + 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 -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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- Definition High end period remaining until maturity for the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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