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 Stock Additional Treasury Retained Accumulated Stock Deferred Total Issued Amount Balance at August 31, 2020 82,594 $ 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 other 6 1 100 — — — — — 101 Restricted stock awards 20 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 trust 5 1 85 — — — (81) 81 86 Balance at November 30, 2020 82,625 $ 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 Stock Additional Treasury Retained Accumulated Stock Deferred Total Issued Amount Balance at August 31, 2019 81,919 $ 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 other 6 1 130 — — — — — 131 Restricted stock awards 190 38 (38) — — — — — — Treasury stock repurchases — — — (17,805) — — — — (17,805) Stock based compensation expense — — 6,537 — — — — — 6,537 Stock option exercises 128 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 trust 5 1 85 — — — (87) 87 86 Adoption of accounting standards — — — — 3,873 (3,667) — — 206 Balance at November 30, 2019 82,248 $ 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 | | | | | | | | | | |