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Derivative Instruments (Outstanding Foreign Currency Forward Contracts) (Details) - USD ($) $ in Thousands | Feb. 29, 2016 | Nov. 30, 2015
--- | --- | ---
Derivative [Line Items] |  |
Derivative contracts, notional value | $ 83,640 | $ 78,825
Derivative contracts, fair value | (5,100) | (4,021)
Forward contracts to sell U.S. dollars [Member] |  |
Derivative [Line Items] |  |
Derivative contracts, notional value | 81,146 | 76,748
Derivative contracts, fair value | (5,119) | (4,026)
Forward contracts to purchase U.S. dollars [Member] |  |
Derivative [Line Items] |  |
Derivative contracts, notional value | 2,494 | 2,077
Derivative contracts, fair value | $ 19 | $ 5

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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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