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Derivative Financial Instruments and Hedging Activities - Fair Value of Assets and Liabilities Related to Foreign Forward Exchange Contracts Measured on Recurring Basis (Details) - Recurring $ in Thousands	Feb. 28, 2018 USD ($)
Assets:
Forward foreign exchange contracts, Assets	$ 63,815
Liabilities:
Forward foreign exchange contracts, Liabilities	(13,666)
Total	50,149
Level 1
Assets:
Forward foreign exchange contracts, Assets	0
Liabilities:
Forward foreign exchange contracts, Liabilities	0
Total	0
Level 2
Assets:
Forward foreign exchange contracts, Assets	63,815
Liabilities:
Forward foreign exchange contracts, Liabilities	(13,666)
Total	50,149
Level 3
Assets:
Forward foreign exchange contracts, Assets	0
Liabilities:
Forward foreign exchange contracts, Liabilities	0
Total	$ 0

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611

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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.

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Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

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