Annual report pursuant to Section 13 and 15(d)

Capital Stock Share Repurchases - Additional Information (Details)

v3.23.3
Capital Stock Share Repurchases - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended 132 Months Ended 144 Months Ended
Aug. 31, 2023
Aug. 31, 2022
Aug. 31, 2022
Aug. 31, 2023
Mar. 16, 2015
Oct. 01, 2014
Mar. 29, 2014
Sep. 28, 2011
Capital Unit [Line Items]                
Common stock, shares authorized 168,000,000 168,000,000 168,000,000 168,000,000        
Common stock, par value $ 0.20 $ 0.20 $ 0.20 $ 0.20        
Common stock, shares issued 83,760,798 83,397,458 83,397,458 83,760,798        
Cumulative Preferred Stock, shares authorized share 160,000     160,000        
Cumulative Preferred Stock, par value $ 1.00     $ 1.00        
Cumulative Preferred Stock, issued 0     0        
Shares authorized in buyback program 10,000,000     10,000,000 7,000,000 7,000,000 7,000,000 7,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 4,026,515     4,026,515        
Stock Repurchased During Period, Shares 2,213,750              
Stock Repurchased During Period, Value $ 57,700              
Treasury Stock, Value, Acquired, Cost Method $ 57,662 $ 75,112 $ 800,500          
Treasury Stock, Common, Shares 28,772,715 26,558,965 26,558,965 28,772,715        
Treasury Stock, Shares, Acquired       28,772,715        
Common Class A                
Capital Unit [Line Items]                
Common stock, shares authorized 168,000,000     168,000,000        
Common stock, par value $ 0.20     $ 0.20        
Common stock, shares issued 83,760,798     83,760,798        
Common stock, shares outstanding 54,988,083     54,988,083        
Common Class B                
Capital Unit [Line Items]                
Common stock, shares authorized 1,500,000     1,500,000        
Common stock, par value $ 0.20     $ 0.20        
Common stock, shares issued 0     0        
Common stock, shares outstanding   0 0