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Derivative Instruments (Tables)
 12 Months Ended
Nov. 30, 2012
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):
 
 
November 30, 2012
 
November 30, 2011
 
Notional Value
 
Fair Value
 
Notional Value
 
Fair Value
Forward contracts to sell U.S. dollars
$
6,453

 
$
4

 
$
2,180

 
$
(54
)
Forward contracts to purchase U.S. dollars
31,465

 
(190
)
 
36,275

 
106

Total
$
37,918

 
$
(186
)
 
$
38,455

 
$
52