Quarterly report pursuant to Section 13 or 15(d)

Share Repurchase Plan - Additional Information (Detail)

v3.23.2
Share Repurchase Plan - Additional Information (Detail) - $ / shares
6 Months Ended 138 Months Ended
May 31, 2023
May 31, 2022
May 31, 2023
Nov. 30, 2022
Oct. 06, 2016
Apr. 08, 2015
Jun. 06, 2012
Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]                
Number of shares authorized to repurchase         8,000,000 6,000,000 3,000,000 1,000,000
Share repurchase plan open market purchases, privately negotiated block trades, unsolicited negotiated transactions, and/or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities and Exchange Commission              
Treasury stock, shares 6,560,832   6,560,832 6,347,490        
Common Stock [Member]                
Equity, Class of Treasury Stock [Line Items]                
Treasury stock, shares 6,560,832   6,560,832          
Repurchase agreement, purchase price per share $ 3.71 $ 8.78 $ 3.57          
Number of shares repurchased 213,342 162,326