Quarterly report pursuant to Section 13 or 15(d)

Income per Common Share - Additional Information (Detail)

v2.4.0.8
Income per Common Share - Additional Information (Detail) (Employee Stock Incentive Plan [Member])
3 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Employee Stock Incentive Plan [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Number of outstanding options excluded from computation of diluted earnings per share 551,334 510,589