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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 [Member]
Treasury Stock [Member]
Total
Beginning balance, shares at Aug. 31, 2014 27,056,000       (10,266,000)  
Beginning balance at Aug. 31, 2014 $ 1,353 $ 207,148 $ 58,496 $ 1,451 $ (141,734)  
Issuance of common stock from treasury, shares         111,000  
Issuance of common stock from treasury   (847)     $ 1,536  
Purchase of treasury shares, shares         (778,000)  
Purchase of treasury shares         $ (14,427)  
Unvested share award, shares         24,000  
Unvested share award   (336)     $ 336  
Stock-based compensation   2,536        
Cumulative translation adjustments       (1,259)   $ (1,259)
Tax benefits (expense) recorded in paid-in capital   137        
Other   (3)     $ 3  
Net income     11,116     11,116
Ending balance, shares at Aug. 31, 2015 27,056,000       (10,909,000)  
Ending balance at Aug. 31, 2015 $ 1,353 208,635 69,612 192 $ (154,286)  
Issuance of common stock from treasury, shares         57,000  
Issuance of common stock from treasury   (143)     $ 823  
Purchase of treasury shares, shares         (2,505,000)  
Purchase of treasury shares         $ (43,586)  
Unvested share award, shares         25,000  
Unvested share award   (356)     $ 356  
Stock-based compensation   3,121        
Cumulative translation adjustments       1,030   1,030
Tax benefits (expense) recorded in paid-in capital   (52)        
Other   (2)     $ 2  
Net income     7,016     7,016
Ending balance, shares at Aug. 31, 2016 27,056,000       (13,332,000)  
Ending balance at Aug. 31, 2016 $ 1,353 211,203 76,628 1,222 $ (196,691) $ 93,715
Issuance of common stock from treasury, shares         188,000 217,581
Issuance of common stock from treasury   (2,103)     $ 2,785  
Purchase of treasury shares, shares         (300,000)  
Purchase of treasury shares         $ (5,431)  
Unvested share award, shares         30,000  
Unvested share award   (442)     $ 442  
Stock-based compensation   3,658        
Cumulative translation adjustments       (555)   $ (555)
Tax benefits (expense) recorded in paid-in capital   168        
Net income     (7,172)     (7,172)
Ending balance, shares at Aug. 31, 2017 27,056,000       (13,414,000)  
Ending balance at Aug. 31, 2017 $ 1,353 $ 212,484 $ 69,456 $ 667 $ (198,895) $ 85,065