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Hedging Instruments (Narrative) (Details) $ in Thousands, € in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2015 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2015 EUR (€) | Sep. 30, 2015 USD ($) | Dec. 31, 2014 USD ($)
Derivative [Line Items] |  |  |  |  |
Estimated net amount of gains that are expected to be reclassified out of accumulated other comprehensive income and into earnings within the next 12 months |  | $ 4,300 |  |  |
General duration of foreign currency exchange contracts |  | 24 months |  |  |
Notional Amount of Foreign Currency Exchange Contracts |  |  |  | $ 211,000 | $ 186,700
Unrealized gain (loss) on net investment hedge | $ (396) | $ 340 |  |  |
Interest Rate Swap Effective On March 30, 2012 [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Credit Facility borrowings hedged |  |  |  | $ 40,000 |
Fixed portion of interest rate associated with interest rate swap |  |  | 1.36% | 1.36% |
Interest Rate Swap Effective On March 28, 2013 [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Credit Facility borrowings hedged |  |  |  | $ 40,000 |
Fixed portion of interest rate associated with interest rate swap |  |  | 1.64% | 1.64% |
Series C Senior Note [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Senior notes payable |  |  | € 88.9 | $ 100,000 |
Senior notes payable, stated interest rate |  |  | 1.785% | 1.785% |

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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 The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument. + References No definition available. + Details
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- Definition Maximum period of time the entity is hedging its exposure to variability in future cash flows for forecasted transactions, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes forecasted transactions related to payment of variable interest on existing financial instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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