Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2
Earnings per Share and Shareholders' Equity Share Repurchase (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 126 Months Ended
May 31, 2022
Feb. 28, 2022
Nov. 30, 2021
May 31, 2021
Feb. 28, 2021
Nov. 30, 2020
May 31, 2022
May 31, 2021
Feb. 28, 2022
Aug. 31, 2021
Aug. 31, 2020
Equity [Abstract]                      
Treasury Stock, Shares 24,554,305           24,554,305     22,799,230  
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 8,244,925           8,244,925        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 366,272 $ 413,023 $ 409,806 $ 416,911 $ 381,393 $ 367,946 $ 366,272 $ 416,911 $ 413,023 $ 412,198 $ 359,226
Net (loss) earnings 1,643 1,221 2,788 25,031 3,182 4,598 5,652 32,811      
Other Comprehensive (Loss) Income, Net of Tax (16,030) 1,744 (10,044) 6,538 9,157 1,629 (24,330) $ 17,324      
Stock Issued During Period, Value, Employee Benefit Plan 66 65 85 97 81 101          
Stock Issued During Period, Value, Restricted Stock Award, Gross   0 0 0 0 0          
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 3,828 2,142 6,147 2,157 2,647 2,581          
Stock Issued During Period, Value, Stock Options Exercised       2,026              
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 40 $ 25 $ 25 $ 25 $ 86 $ 86          
Retained earnings 958,991           958,991     953,339  
Treasury Stock, Value $ 704,027           $ 704,027     $ 667,732  
Treasury Stock, Value, Acquired, Cost Method                 $ 704,000    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 8,244,925           8,244,925        
Stock Repurchase Program, Number of Shares Authorized to be Repurchased 10,000,000           10,000,000        
Stock Repurchased During Period, Shares 1,755,075                    
Stock Repurchased During Period, Value $ 36,300                    
Common Stock [Member]                      
Stock Issued During Period, Shares, New Issues 83,350,000 83,345,000 83,092,000 82,991,000 82,879,000 82,625,000 83,350,000 82,991,000 83,345,000 83,022,000 82,594,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 16,670 $ 16,669 $ 16,622 $ 16,598 $ 16,576 $ 16,525 $ 16,670 $ 16,598 $ 16,669 $ 16,604 $ 16,519
Stock Issued During Period, Shares, Employee Benefit Plan 4,000 5,000 2,000 5,000 4,000 6,000          
Stock Issued During Period, Value, Employee Benefit Plan $ 1 $ 1 $ 1 $ 1 $ 1 $ 1          
Stock Issued During Period, Shares, Restricted Stock Award, Gross   247,000 67,000 17,000 235,000 20,000          
Stock Issued During Period, Value, Restricted Stock Award, Gross   $ 46 $ 17 $ 3 $ 47 $ 4          
Stock Issued During Period, Shares, Other       89,000              
Stock Issued During Period, Value, Stock Options Exercised       $ 18              
Stock Issued To Acquired For And Distributed From Rabbi Trust   1,000 1,000 1,000 15,000 5,000          
Stock Value Issued to Acquired For and Distributed From Rabbi Trust     $ 0   $ 3 $ 1          
Additional Paid-in Capital [Member]                      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 211,952 $ 208,022 207,817 $ 200,963 197,036 195,979 211,952 200,963 208,022 202,971 193,492
Stock Issued During Period, Value, Employee Benefit Plan 65 64 84 96 80 100          
Stock Issued During Period, Value, Restricted Stock Award, Gross   (46) (17) (3) (47) (4)          
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 3,828 2,142 6,147 2,157 2,647 2,581          
Stock Issued During Period, Value, Stock Options Exercised       2,008              
Adjustments to Additional Paid in Capital, Other 3 1,980 1,393 356 1,706 275          
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 40 25 25 25 83 85          
Treasury Stock [Member]                      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (704,027) (667,732) (667,732) (667,732) (667,732) (667,732) (704,027) (667,732) (667,732) (667,732) (667,732)
Treasury Stock, Value, Acquired, Cost Method (36,295)                    
Retained Earnings [Member]                      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 958,991 957,348 956,127 950,482 925,451 922,269 958,991 950,482 957,348 953,339 917,671
Net (loss) earnings 1,643 1,221 2,788 25,031 3,182 4,598          
AOCI Attributable to Parent [Member]                      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (117,314) (101,284) (103,028) (83,400) (89,938) (99,095) (117,314) (83,400) (101,284) (92,984) (100,724)
Other Comprehensive (Loss) Income, Net of Tax (16,030) 1,744 (10,044) 6,538 9,157 1,629          
Stock held in trust [member] [Member]                      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (3,148) (3,089) (3,092) (2,999) (2,996) (2,643) (3,148) (2,999) (3,089) (3,067) (2,562)
Stock Value Issued to Acquired For and Distributed From Rabbi Trust (59) 3 (25) (3) (353) (81)          
Deferred Compensation, Share-based Payments [Member]                      
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 3,148 3,089 3,092 2,999 2,996 2,643 $ 3,148 $ 2,999 $ 3,089 $ 3,067 $ 2,562
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 59 $ (3) $ 25 $ 3 $ 353 $ 81