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SHARE-BASED COMPENSATION: Share-based Compensation Expense (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Nov. 30, 2012
Nov. 30, 2011
Nov. 30, 2010
Share-based Compensation [Abstract]      
Total share-based compensation $ 8,445 $ 7,993 $ 8,725
Tax effect on share-based compensation (3,001) (2,755) (3,180)
Net effect on net income 5,444 5,238 5,545
Founder and former Chairman [Member]
     
Share-based Compensation [Abstract]      
One time recognition of costs     $ 1,005