EARNINGS PER COMMON SHARE: (Antidilutive Securities) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
May 31, 2013
May 31, 2012
May 31, 2013
May 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Increase (decrease) in fair value of conversion premium - EPS impact $ (1,981)   $ (1,981)  
Options [Member]
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Options excluded from computation of diluted net income per share 14 3 16 5