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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Treasury Stock [Member]
Total
Beginning balance at Aug. 31, 2017 $ 20 $ 150,692 $ 315,764 $ (28,075) $ (299,014) $ 139,387
Beginning balance, shares at Aug. 31, 2017 19,688,238       5,704,055  
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   (1,607)       (1,607)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 41,536          
Stock-based compensation   4,195       4,195
Cash dividends     (29,585)     (29,585)
Acquisition of treasury stock         $ (22,616) (22,616)
Acquisition of treasury stock, shares         175,306  
Foreign currency translation adjustment       439   439
Net income     65,215     65,215
Ending balance at Aug. 31, 2018 $ 20 153,469 351,266 (27,636) $ (321,630) 155,489
Ending balance, shares at Aug. 31, 2018 19,729,774       5,879,361  
Cumulative effect of change in accounting principle   189 (128)     61
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   (2,783)       (2,783)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 44,203          
Stock-based compensation   4,446       4,446
Cash dividends     (32,889)     (32,889)
Acquisition of treasury stock         $ (29,625) (29,625)
Acquisition of treasury stock, shares         175,955  
Foreign currency translation adjustment       (4,748)   (4,748)
Net income     55,908     55,908
Ending balance at Aug. 31, 2019 $ 20 155,132 374,060 (32,482) $ (351,255) $ 145,475
Ending balance, shares at Aug. 31, 2019 19,773,977       6,055,316 13,718,661
Cumulative effect of change in accounting principle     (225) (98)   $ (323)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   (2,640)       (2,640)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 38,708          
Stock-based compensation   5,358       5,358
Cash dividends     (36,039)     (36,039)
Acquisition of treasury stock         $ (16,825) (16,825)
Acquisition of treasury stock, shares         92,583  
Foreign currency translation adjustment       4,274   4,274
Net income     60,710     60,710
Ending balance at Aug. 31, 2020 $ 20 $ 157,850 $ 398,731 $ (28,208) $ (368,080) $ 160,313
Ending balance, shares at Aug. 31, 2020 19,812,685       6,147,899 13,664,786