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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, 2019 $ 268,209 $ 18,870 $ (277,238) $ 71,684 $ 474,740 $ (19,847)
Beginning balance, shares at Aug. 31, 2019   18,870 8,083      
Net earnings 23,955 $ 0 $ 0 0 23,955 0
Other comprehensive income (loss) (3,581) 0 0 0 0 (3,581)
Total comprehensive income 20,374 0 0 0 0 0
Cash dividends per share (10,177) 0 0 0 (10,177) 0
Issuance of common shares under share compensation plans, net 434 $ 48 $ 0 386 0 0
Issuance of common shares under share compensation plans, net, shares   48 0      
Share-based compensation expense 4,118 $ 0 $ 0 4,118 0 0
Ending balance, value at May. 31, 2020 282,958 $ 18,918 $ (277,238) 76,188 488,518 (23,428)
Ending Balance, shares at May. 31, 2020   18,918 8,083      
Net earnings (loss) 23,955 $ 0 $ 0 0 23,955 0
Beginning balance, value at Feb. 29, 2020 277,327 $ 18,918 $ (277,238) 74,645 481,890 (20,888)
Beginning balance, shares at Feb. 29, 2020   18,918 8,083      
Net earnings 10,094 $ 0 $ 0 0 10,094 0
Other comprehensive income (loss) (2,540) 0 0 0 0 (2,540)
Total comprehensive income 7,554 0 0 0 0 0
Cash dividends per share (3,466) 0 0 0 (3,466) 0
Issuance of common shares under share compensation plans, net 0 $ 0 $ 0 0 0 0
Issuance of common shares under share compensation plans, net, shares   0 0      
Share-based compensation expense 1,543 $ 0 $ 0 1,543 0 0
Ending balance, value at May. 31, 2020 282,958 $ 18,918 $ (277,238) 76,188 488,518 (23,428)
Ending Balance, shares at May. 31, 2020   18,918 8,083      
Net earnings (loss) 10,094 $ 0 $ 0 0 10,094 0
Beginning balance, value at Aug. 31, 2020 298,518 $ 18,918 $ (277,238) 77,686 499,724 (20,572)
Beginning balance, shares at Aug. 31, 2020   18,918 8,083      
Net earnings 36,768 $ 0 $ 0 0 36,768 0
Other comprehensive income (loss) 3,809 0 0 0 0 3,809
Total comprehensive income 40,577 0 0 0 0 0
Cash dividends per share (10,566) 0 0 0 (10,566) 0
Issuance of common shares under share compensation plans, net 2,623 $ 73 $ 0 2,550 0 0
Issuance of common shares under share compensation plans, net, shares   73 0      
Share-based compensation expense 5,021 $ 0 $ 0 5,021 0 0
Ending balance, value at May. 31, 2021 336,173 $ 18,991 $ (277,238) 85,257 525,926 (16,763)
Ending Balance, shares at May. 31, 2021   18,991 8,083      
Net earnings (loss) 36,768 $ 0 $ 0 0 36,768 0
Beginning balance, value at Feb. 28, 2021 319,024 $ 18,990 $ (277,238) 84,206 511,728 (18,662)
Beginning balance, shares at Feb. 28, 2021   18,990 8,083      
Net earnings 17,797 $ 0 $ 0 0 17,797 0
Other comprehensive income (loss) 1,899 0 0 0 0 1,899
Total comprehensive income 19,696 0 0 0 0 0
Cash dividends per share (3,599) 0 0 0 (3,599) 0
Issuance of common shares under share compensation plans, net 78 $ 1 $ 0 77 0 0
Issuance of common shares under share compensation plans, net, shares   1 0      
Share-based compensation expense 974 $ 0 $ 0 974 0 0
Ending balance, value at May. 31, 2021 336,173 $ 18,991 $ (277,238) 85,257 525,926 (16,763)
Ending Balance, shares at May. 31, 2021   18,991 8,083      
Net earnings (loss) $ 17,797 $ 0 $ 0 $ 0 $ 17,797 $ 0