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Derivative Instruments and Hedging Activity (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Derivative instruments and hedging activity for the period [Abstract] |  |  |
Impact of foreign exchange rates on debt instruments recorded in Other Comprehensive Income | $ 6,989 | $ 7,542 | $ 12,677
Forward Exchange Contracts [Member] |  |  |
Derivative instruments and hedging activity for the period [Abstract] |  |  |
Amount of gain (loss) reclassified into net earnings | $ (1,100) | (1,200) |
Forward Exchange Contracts [Member] | Maximum [Member] |  |  |
Derivative instruments and hedging activity for the period [Abstract] |  |  |
Number of months for contracts to mature | 18 months |  |
Forward Exchange Contracts [Member] | Cash Flow Hedging [Member] |  |  |
Derivative instruments and hedging activity for the period [Abstract] |  |  |
Derivative, fair value | $ 25,400 | 35,200 |
Foreign Currency Denominated Debt, Net Investment Hedging [Member] |  |  |
Derivative instruments and hedging activity for the period [Abstract] |  |  |
Carrying value of foreign denominated debt | 195,600 | 162,500 |
Impact of foreign exchange rates on debt instruments recorded in Other Comprehensive Income | $ 6,989 | $ 7,542 |

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- Definition Fair value of all asset derivatives designated as cash flow 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 4B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959 + Details
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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying 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 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624177-113959 + Details
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- Definition Amount of increase (decrease) in the cumulative translation adjustment from gain (loss), after tax, on foreign currency derivatives, that are designated as, and are effective as, economic hedges of a net investment in a foreign entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b),(c),(d) -URI http://asc.fasb.org/extlink&oid=64808268&loc=d3e32211-110900 + Details
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