Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Earnings per Share and Shareholders' Equity Shareholders' Equity (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
May 31, 2019
May 31, 2018
May 31, 2019
May 31, 2018
Feb. 28, 2019
Aug. 31, 2018
Feb. 28, 2018
Aug. 31, 2017
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 607,424 $ 601,028 $ 607,424 $ 601,028 $ 585,630 $ 558,712 $ 589,281 $ 500,539
Net earnings 32,418 29,012 17,719 16,017        
Other Comprehensive Income (Loss), Net of Tax (13,800) (20,953) 20,693 63,081        
Stock Issued During Period, Value, Employee Benefit Plan 115 130 359 396        
Stock Issued During Period, Value, Restricted Stock Award, Gross 0 0 0 0        
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition 3,091 3,659 10,253 11,951        
Stock Issued During Period, Value, Stock Options Exercised 206   993 10,039        
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation (322) (171) (1,811) (1,279)        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 86 $ 70 431 $ 284        
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets $ 100   $ 100          
Common Stock [Member]                
Stock Issued During Period, Shares, New Issues 81,880 81,136 81,880 81,136 81,832 81,424 81,088 80,200
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 16,374 $ 16,227 $ 16,374 $ 16,227 $ 16,364 $ 16,285 $ 16,218 $ 16,040
Stock Issued During Period, Shares, Employee Benefit Plan 5 5 15 15        
Stock Issued During Period, Value, Employee Benefit Plan $ 1 $ 1 $ 3 $ 3        
Stock Issued During Period, Shares, Restricted Stock Award, Gross 28 43 366 395        
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 6 $ 8 $ 71 $ 79        
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures 10   45 506        
Stock Issued During Period, Value, Stock Options Exercised $ 2   $ 9 $ 101        
Stock Issued To Acquired For And Distributed From Rabbi Trust 5   30 20        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 1   $ 6 $ 4        
Additional Paid-in Capital [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 177,584 159,653 177,584 159,653 174,418 167,448 155,974 138,449
Stock Issued During Period, Value, Employee Benefit Plan 114 129 356 393        
Stock Issued During Period, Value, Restricted Stock Award, Gross (6) (8) (71) (79)        
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition 3,091 3,659 10,253 11,951        
Stock Issued During Period, Value, Stock Options Exercised 204   984 9,938        
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation 322 171 1,811 1,279        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust 85 70 425 280        
Treasury Stock [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (617,731) (617,731) (617,731) (617,731) (617,731) (617,731) (617,731) (617,731)
Retained Earnings [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 1,184,749 1,207,059 1,184,749 1,207,059 1,152,331 1,166,955 1,178,047 1,191,042
AOCI Attributable to Parent [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (153,552) (164,180) (153,552) (164,180) (139,752) (174,245) (143,227) (227,261)
Other Comprehensive Income (Loss), Net of Tax (13,800) (20,953) 20,693 63,081        
Stock held in trust [member] [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (3,075) (2,594) (3,075) (2,594) (2,989) (2,450) (2,848) (2,696)
Other Comprehensive Income (Loss), Net of Tax   254   254        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust (86)   (625) (152)        
Deferred Compensation, Share-based Payments [Member]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 3,075 2,594 3,075 2,594 $ 2,989 $ 2,450 $ 2,848 $ 2,696
Other Comprehensive Income (Loss), Net of Tax   $ (254)   (254)        
Stock Value Issued to Acquired For and Distributed From Rabbi Trust $ 86   $ 625 $ 152