Quarterly report [Sections 13 or 15(d)]

Share Repurchase Plan - Additional Information (Detail)

v3.25.1
Share Repurchase Plan - Additional Information (Detail) - $ / shares
3 Months Ended 159 Months Ended
Feb. 28, 2025
Feb. 29, 2024
Feb. 28, 2025
Nov. 30, 2024
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, common, shares 6,787,460   6,787,460 6,787,460        
Common Stock [Member]                
Equity, Class of Treasury Stock [Line Items]                
Treasury stock, common, shares 6,787,460   6,787,460          
Repurchase agreement, purchase price per share $ 0 $ 5.36 $ 3.66          
Treasury Stock [Member]                
Equity, Class of Treasury Stock [Line Items]                
Number of shares repurchased 0 31,808