Annual report pursuant to Section 13 and 15(d)

Capital Stock Share Repurchases - Additional Information (Details)

v3.22.2.2
Capital Stock Share Repurchases - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended 132 Months Ended
Aug. 31, 2022
Aug. 31, 2020
Aug. 31, 2022
Aug. 31, 2021
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        
Common stock, par value $ 0.20   $ 0.20 $ 0.20        
Common stock, shares issued 83,397,458   83,397,458 83,021,654        
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
Treasury stock, shares 26,558,965   26,558,965 22,799,230        
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 6,240,265   6,240,265          
Stock Repurchased During Period, Shares 3,759,735              
Stock Repurchased During Period, Value $ 75,100              
Treasury Stock, Value, Acquired, Cost Method $ 75,112 $ 27,520 $ 742,800          
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 83,397,458   83,397,458          
Common stock, shares outstanding 56,838,493   56,838,493          
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