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Derivative Instruments (Tables)
 6 Months Ended
May 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Outstanding Foreign Currency Forward Contracts
The table below details outstanding foreign currency forward contracts where the notional amount is determined using contract exchange rates (in thousands):
 
 
May 31, 2017
 
November 30, 2016
 
Notional Value
 
Fair Value
 
Notional Value
 
Fair Value
Forward contracts to sell U.S. dollars
$
111,962

 
$
(5,898
)
 
$
74,690

 
$
(6,597
)
Forward contracts to purchase U.S. dollars
595

 
—

 
1,673

 
(19
)
Total
$
112,557

 
$
(5,898
)
 
$
76,363

 
$
(6,616
)