Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Earnings per Share and Shareholders' Equity Shareholders' Equity (Details) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Nov. 30, 2019
Aug. 31, 2019
Nov. 30, 2018
Aug. 31, 2018
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 354,365 $ 585,630 $ 354,365 $ 585,630 $ 353,253 $ 301,179 $ 537,565 $ 558,712
Net earnings (loss) 2,162 2,753 4,283 (14,699)        
Other Comprehensive Income (Loss), Net of Tax (3,052) 42,437 57,875 34,493        
Stock Issued During Period, Value, Employee Benefit Plan 126 126 257 244        
Stock Issued During Period, Value, Restricted Stock Award, Gross 0 0 0 0        
Stock Repurchased During Period, Value     (17,805)          
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 3,093 3,568 9,630 7,162        
Stock Issued During Period, Value, Stock Options Exercised 122 353 2,631 787        
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation (1,425) (1,287) (4,063) (1,488)        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 86 115 172 344        
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets $ 206 $ 75 $ 206 $ 75        
Common Stock [Member]                
Stock Issued During Period, Shares, New Issues 82,540 81,832 82,540 81,832 82,248 81,919 81,503 81,424
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 16,508 $ 16,364 $ 16,508 $ 16,364 $ 16,450 $ 16,384 $ 16,301 $ 16,285
Stock Issued During Period, Shares, Employee Benefit Plan 5 6 11 10        
Stock Issued During Period, Value, Employee Benefit Plan $ 1 $ 1 $ 2 $ 2        
Stock Issued During Period, Shares, Restricted Stock Award, Gross 259 284 449 334        
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 52 $ 56 $ 90 $ 65        
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture 17 20 145 41        
Stock Issued During Period, Value, Stock Options Exercised $ 3 $ 4 $ 29 $ 8        
Stock Issued To Acquired For And Distributed From Rabbi Trust 11 19 16 23        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 2 $ 2 $ 3 $ 4        
Additional Paid-in Capital [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 189,716 174,418 189,716 174,418 187,772 181,213 171,606 167,448
Stock Issued During Period, Value, Employee Benefit Plan 125 125 255 242        
Stock Issued During Period, Value, Restricted Stock Award, Gross (52) (56) (90) (65)        
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 3,093 3,568 9,630 7,162        
Stock Issued During Period, Value, Stock Options Exercised 119 349 2,602 779        
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation (1,425) (1,287) (4,063) (1,488)        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 84 113 169 340        
Treasury Stock [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (658,017) (617,731) (658,017) (617,731) (658,017) (640,212) (617,731) (617,731)
Stock Repurchased During Period, Value     (17,805)          
Retained Earnings [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 923,622 1,152,331 923,622 1,152,331 921,460 915,466 1,149,578 1,166,955
Net earnings (loss) 2,162 2,753 4,283 (14,699)        
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets 3,873 75 3,873 75        
AOCI Attributable to Parent [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (117,464) (139,752) (117,464) (139,752) (114,412) (171,672) (182,189) (174,245)
Other Comprehensive Income (Loss), Net of Tax (3,052) 42,437 57,875 34,493        
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets (3,667)   (3,667)          
Stock held in trust [member] [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (2,434) (2,989) (2,434) (2,989) (3,157) (3,070) (2,573) (2,450)
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 723 (416) 636 (539)        
Deferred Compensation, Share-based Payments [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 2,434 2,989 2,434 2,989 $ 3,157 $ 3,070 $ 2,573 $ 2,450
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ (723) $ 416 $ (636) $ 539