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Derivative Instruments (Schedule of Derivatives) (Details) - USD ($) | Aug. 31, 2019 | Nov. 30, 2018
--- | --- | ---
Derivative [Line Items] |  |
Notional Value | $ 76,255,000 | $ 106,070,000
Fair Value | (2,910,000) | (170,000)
Interest rate swap contracts designated as cash flow hedges |  |
Derivative [Line Items] |  |
Notional Value | 149,063,000 | 0
Fair Value | (3,348,000) | 0
Forward contracts to sell U.S. dollars |  |
Derivative [Line Items] |  |
Notional Value | 75,096,000 | 105,830,000
Fair Value | (2,915,000) | (170,000)
Forward contracts to purchase U.S. dollars |  |
Derivative [Line Items] |  |
Notional Value | 1,159,000 | 240,000
Fair Value | $ 5,000 | $ 0

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