DERIVATIVE INSTRUMENTS: (Tables)
6 Months Ended
May 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of fair value of foreign exchange forward contracts
The following table summarizes the fair value of the Company’s foreign exchange forward contracts as of May 31, 2013 and November 30, 2012:
  
 
Fair Value as of
Location                 
 
May 31, 2013
 
November 30, 2012
Other current assets
 
$
2,487

 
$
1,292

Accrued liabilities
 
215