Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share and Shareholders' Equity Share Repurchase (Details)

v3.22.4
Earnings per Share and Shareholders' Equity Share Repurchase (Details) - USD ($)
$ in Thousands
 3 Months Ended 123 Months Ended
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2021
Aug. 31, 2022
Aug. 31, 2021
Equity [Abstract]          
Treasury Stock, Shares 26,558,965     26,558,965  
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 6,240,265        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 334,323 $ 409,806 $ 409,806 $ 318,611 $ 412,198
Net (loss) earnings 7,453 2,788      
Other Comprehensive (Loss) Income, Net of Tax 6,024 (10,044)      
Stock Issued During Period, Value, Employee Benefit Plan 42 85      
Stock Issued During Period, Value, Restricted Stock Award, Gross 0 0      
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 2,155 6,147      
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 77 $ 25      
Retained earnings 974,204     966,751  
Treasury Stock, Value $ 742,844     $ 742,844  
Treasury Stock, Value, Acquired, Cost Method     $ 742,800    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased 10,000,000        
Common Stock [Member]          
Stock Issued During Period, Shares, New Issues 83,529,000 83,092,000 83,092,000 83,397,000 83,022,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 16,706 $ 16,622 $ 16,622 $ 16,679 $ 16,604
Stock Issued During Period, Shares, Employee Benefit Plan 3,000 2,000      
Stock Issued During Period, Value, Employee Benefit Plan $ 1 $ 1      
Stock Issued During Period, Shares, Restricted Stock Award, Gross 84,000 67,000      
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 17 $ 17      
Stock Issued To Acquired For And Distributed From Rabbi Trust 3,000 1,000      
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 1 $ 0      
Additional Paid-in Capital [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 215,194 207,817 207,817 212,986 202,971
Stock Issued During Period, Value, Employee Benefit Plan 41 84      
Stock Issued During Period, Value, Restricted Stock Award, Gross (17) (17)      
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 2,155 6,147      
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 76 25      
Treasury Stock [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (742,844) (667,732) (667,732) (742,844) (667,732)
Retained Earnings [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 974,204 956,127 956,127 966,751 953,339
Net (loss) earnings 7,453 2,788      
AOCI Attributable to Parent [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (128,937) (103,028) (103,028) (134,961) (92,984)
Other Comprehensive (Loss) Income, Net of Tax 6,024 (10,044)      
Stock held in trust [member] [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (3,239) (3,092) (3,092) (3,209) (3,067)
Stock Value Issued to Acquired For and Distributed From Rabbi Trust (30) (25)      
Deferred Compensation, Share-based Payments [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 3,239 3,092 $ 3,092 $ 3,209 $ 3,067
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 30 $ 25