Quarterly report pursuant to Section 13 or 15(d)

Income per Common Share - Additional Information (Detail)

v3.2.0.727
Income per Common Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
May. 31, 2015
May. 31, 2014
May. 31, 2015
May. 31, 2014
Stock Option [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of outstanding options excluded from computation of diluted earnings per share 271,000 296,001 271,000 419,334