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Condensed Consolidated Statements of Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Treasury Stock [Member]
Capital In Excess Of Stated Value [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss, Net [Member]
Beginning balance, value at Aug. 31, 2021 $ 338,445 $ 18,991 $ (277,238) $ 86,495 $ 528,130 $ (17,933)
Beginning balance, shares at Aug. 31, 2021   18,991 8,083      
Net earnings 22,467 $ 0 $ 0 0 22,467 0
Other comprehensive income (loss) (1,418) 0 0 0 0 (1,418)
Total comprehensive income 21,049 0 0 0 0 0
Cash dividends per share (7,242) 0 0 0 (7,242) 0
Issuance of common shares under share compensation plans, net 1,875 $ 70 $ 0 1,805 0 0
Issuance of common shares under share compensation plans, net, shares   70 0      
Share-based compensation expense 2,411 $ 0 $ 0 2,411 0 0
Ending balance, value at Feb. 28, 2022 356,538 $ 19,061 $ (277,238) 90,711 543,355 (19,351)
Ending Balance, shares at Feb. 28, 2022   19,061 8,083      
Beginning balance, value at Nov. 30, 2021 341,943 $ 19,056 $ (277,238) 89,006 532,410 (21,291)
Beginning balance, shares at Nov. 30, 2021   19,056 8,083      
Net earnings 14,566 $ 0 $ 0 0 14,566 0
Other comprehensive income (loss) 1,940 0 0 0 0 1,940
Total comprehensive income 16,506 0 0 0 0 0
Cash dividends per share (3,621) 0 0 0 (3,621) 0
Issuance of common shares under share compensation plans, net 521 $ 5 $ 0 516 0 0
Issuance of common shares under share compensation plans, net, shares   5 0      
Share-based compensation expense 1,189 $ 0 $ 0 1,189 0 0
Ending balance, value at Feb. 28, 2022 356,538 $ 19,061 $ (277,238) 90,711 543,355 (19,351)
Ending Balance, shares at Feb. 28, 2022   19,061 8,083      
Beginning balance, value at Aug. 31, 2022 393,358 $ 19,063 $ (277,238) 94,006 579,000 (21,473)
Beginning balance, shares at Aug. 31, 2022   19,063 8,083      
Net earnings 36,269 $ 0 $ 0 0 36,269 0
Other comprehensive income (loss) (726) 0 0 0 0 (726)
Total comprehensive income 35,543 0 0 0 0 0
Cash dividends per share (7,485) 0 0 0 (7,485) 0
Issuance of common shares under share compensation plans, net (2,233) $ 28 $ 0 (2,261) 0 0
Issuance of common shares under share compensation plans, net, shares   28 0      
Share-based compensation expense 3,089 $ 0 $ 0 3,089 0 0
Ending balance, value at Feb. 28, 2023 422,272 $ 19,091 $ (277,238) 94,834 607,784 (22,199)
Ending Balance, shares at Feb. 28, 2023   19,091 8,083      
Beginning balance, value at Nov. 30, 2022 404,788 $ 19,090 $ (277,238) 93,079 593,475 (23,618)
Beginning balance, shares at Nov. 30, 2022   19,090 8,083      
Net earnings 18,052 $ 0 $ 0 0 18,052 0
Other comprehensive income (loss) 1,419 0 0 0 0 1,419
Total comprehensive income 19,471 0 0 0 0 0
Cash dividends per share (3,743) 0 0 0 (3,743) 0
Issuance of common shares under share compensation plans, net 140 $ 1 $ 0 139 0 0
Issuance of common shares under share compensation plans, net, shares   1 0      
Share-based compensation expense 1,616 $ 0 $ 0 1,616 0 0
Ending balance, value at Feb. 28, 2023 $ 422,272 $ 19,091 $ (277,238) $ 94,834 $ 607,784 $ (22,199)
Ending Balance, shares at Feb. 28, 2023   19,091 8,083