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Earnings per Share and Shareholders' Equity Shareholders Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Accounting Standards Update [Domain]
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Accounting Standards Update [Domain]
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent [Member]
Accounting Standards Update [Domain]
Stock held in trust [member] [Member]
Deferred Compensation, Share-based Payments [Member]
Stock Issued During Period, Shares, New Issues     81,919                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 301,179   $ 16,384 $ 181,213 $ (640,212) $ 915,466   $ (171,672)   $ (3,070) $ 3,070
Net (loss) earnings 2,121         2,121          
Other Comprehensive (Loss) Income, Net of Tax 60,927             60,927      
Stock Issued During Period, Shares, Employee Benefit Plan     6                
Stock Issued During Period, Value, Employee Benefit Plan 131   $ 1 130              
Stock Issued During Period, Shares, Restricted Stock Award, Gross     190                
Stock Issued During Period, Value, Restricted Stock Award, Gross 0   $ 38 (38)              
Payments for Repurchase of Common Stock 17,805                    
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 6,537     6,537              
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture     128                
Stock Issued During Period, Value, Stock Options Exercised 2,509   $ 26 2,483              
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation (2,638)     (2,638)              
Stock Issued To Acquired For And Distributed From Rabbi Trust     5                
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 86   $ 1 85           (87) 87
Treasury Stock, Value, Acquired, Cost Method (17,805)       17,805            
Stock Issued During Period, Shares, New Issues     82,248                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 353,253   $ 16,450 187,772 (658,017) 921,460   (114,412)   (3,157) 3,157
Adoption of Accounting Standards   $ 206         $ 3,873   $ (3,667)    
Stock Issued During Period, Shares, New Issues     82,594                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 359,226   $ 16,519 193,492 (667,732) 917,671   (100,724)   (2,562) 2,562
Adoption of Accounting Standards $ 917,671                    
Stockholders' Equity Note Disclosure [Text Block]
The following table illustrates the changes in the balances of each component of shareholders' equity for the three months ended November 30, 2020 (in thousands):
 Common StockAdditional
Paid-in
Capital		Treasury
Stock		Retained
Earnings		Accumulated
Other
Comprehensive
Loss		Stock
Held in
Trust		Deferred
Compensation
Liability		Total
Shareholders’
Equity
 Issued
Shares		Amount
Balance at August 31, 202082,594 $16,519 $193,492 $(667,732)$917,671 $(100,724)$(2,562)$2,562 $359,226 
Net earnings— — — — 4,598 — — — 4,598 
Other comprehensive income, net of tax— — — — — 1,629 — — 1,629 
Stock contribution to employee benefit plans and other6 1 100 — — — — — 101 
Restricted stock awards20 4 (4)— — — — — — 
Stock based compensation expense— — 2,581 — — — — — 2,581 
Tax effect related to net share settlement of equity awards— — (275)— — — — — (275)
Stock issued to, acquired for and distributed from rabbi trust5 1 85 — — — (81)81 86 
Balance at November 30, 202082,625 $16,525 $195,979 $(667,732)$922,269 $(99,095)$(2,643)$2,643 $367,946 
The following table illustrates the changes in the balances of each component of shareholders' equity for the three months ended November 30, 2019 (in thousands):
 Common StockAdditional
Paid-in
Capital		Treasury
Stock		Retained
Earnings		Accumulated
Other
Comprehensive
Loss		Stock
Held in
Trust		Deferred
Compensation
Liability		Total
Shareholders’
Equity
 Issued
Shares		Amount
Balance at August 31, 201981,919 $16,384 $181,213 $(640,212)$915,466 $(171,672)$(3,070)$3,070 $301,179 
Net earnings— — — — 2,121 — — — 2,121 
Other comprehensive income, net of tax— — — — — 60,927 — — 60,927 
Stock contribution to employee benefit plans and other6 1 130 — — — — — 131 
Restricted stock awards190 38 (38)— — — — — — 
Treasury stock repurchases— — — (17,805)— — — — (17,805)
Stock based compensation expense— — 6,537 — — — — — 6,537 
Stock option exercises128 26 2,483 — — — — — 2,509 
Tax effect related to net share settlement of equity awards— — (2,638)— — — — — (2,638)
Stock issued to, acquired for and distributed from rabbi trust5 1 85 — — — (87)87 86 
Adoption of accounting standards— — — — 3,873 (3,667)— — 206 
Balance at November 30, 201982,248 $16,450 $187,772 $(658,017)$921,460 $(114,412)$(3,157)$3,157 $353,253 
                    
Net (loss) earnings $ 4,598         4,598          
Other Comprehensive (Loss) Income, Net of Tax 1,629             1,629      
Stock Issued During Period, Shares, Employee Benefit Plan     6                
Stock Issued During Period, Value, Employee Benefit Plan 101   $ 1 100              
Stock Issued During Period, Shares, Restricted Stock Award, Gross     20                
Stock Issued During Period, Value, Restricted Stock Award, Gross 0   $ 4 (4)              
Payments for Repurchase of Common Stock 0                    
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 2,581     2,581              
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation (275)     (275)              
Stock Issued To Acquired For And Distributed From Rabbi Trust     5                
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 86   $ 1 85           (81) 81
Stock Issued During Period, Shares, New Issues     82,625                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 367,946   $ 16,525 $ 195,979 $ (667,732) $ 922,269   $ (99,095)   $ (2,643) $ 2,643
Adoption of Accounting Standards $ 922,269