Quarterly report pursuant to Section 13 or 15(d)

Income per Common Share - Additional Information (Detail)

v3.21.1
Income per Common Share - Additional Information (Detail) - shares
3 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Employee Stock Incentive Plan [Member]    
Earnings Per Share Basic And Diluted [Line Items]    
Number of outstanding options excluded from computation of diluted earnings per share 39,000 232,737