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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 | May 31, 2018 USD ($)
--- | ---
Assets: |
Forward foreign exchange contracts, Assets | $ 13,662
Liabilities: |
Forward foreign exchange contracts, Liabilities | (31,847)
Total | (18,185)
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 | 13,662
Liabilities: |
Forward foreign exchange contracts, Liabilities | (31,847)
Total | (18,185)
Level 3 |
Assets: |
Forward foreign exchange contracts, Assets | 0
Liabilities: |
Forward foreign exchange contracts, Liabilities | 0
Total | $ 0

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