Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.4
Earnings per Share and Shareholders' Equity Share Repurchase (Details) - USD ($)
$ in Thousands
3 Months Ended 123 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Aug. 31, 2021
Aug. 31, 2020
Equity [Abstract]          
Treasury Stock, Shares 22,799,230   22,799,230 22,799,230  
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 5,200,770   5,200,770    
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 409,806 $ 367,946 $ 409,806 $ 412,198 $ 359,226
Net (loss) earnings 2,788 4,598      
Other Comprehensive (Loss) Income, Net of Tax (10,044) 1,629      
Stock Issued During Period, Value, Employee Benefit Plan 85 101      
Stock Issued During Period, Value, Restricted Stock Award, Gross 0 0      
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 6,147 2,581      
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation (1,393) (275)      
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 25 $ 86      
Retained earnings 956,127   956,127 953,339  
Treasury Stock, Value $ 667,732   667,732 $ 667,732  
Treasury Stock, Value, Acquired, Cost Method     $ 667,700    
Common Stock [Member]          
Stock Issued During Period, Shares, New Issues 83,092,000 82,625,000 83,092,000 83,022,000 82,594,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 16,622 $ 16,525 $ 16,622 $ 16,604 $ 16,519
Stock Issued During Period, Shares, Employee Benefit Plan 2,000 6,000      
Stock Issued During Period, Value, Employee Benefit Plan $ 1 $ 1      
Stock Issued During Period, Shares, Restricted Stock Award, Gross 67,000 20,000      
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 17 $ 4      
Stock Issued To Acquired For And Distributed From Rabbi Trust 1,000 5,000      
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 0 $ 1      
Additional Paid-in Capital [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 207,817 195,979 207,817 202,971 193,492
Stock Issued During Period, Value, Employee Benefit Plan 84 100      
Stock Issued During Period, Value, Restricted Stock Award, Gross (17) (4)      
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 6,147 2,581      
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation (1,393) (275)      
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 25 85      
Treasury Stock [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (667,732) (667,732) (667,732) (667,732) (667,732)
Retained Earnings [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 956,127 922,269 956,127 953,339 917,671
Net (loss) earnings 2,788 4,598      
AOCI Attributable to Parent [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (103,028) (99,095) (103,028) (92,984) (100,724)
Other Comprehensive (Loss) Income, Net of Tax (10,044) 1,629      
Stock held in trust [member] [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (3,092) (2,643) (3,092) (3,067) (2,562)
Stock Value Issued to Acquired For and Distributed From Rabbi Trust (25) (81)      
Deferred Compensation, Share-based Payments [Member]          
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 3,092 2,643 $ 3,092 $ 3,067 $ 2,562
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 25 $ 81