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CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (USD $)
In Thousands, except Share data
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, 2011 $ 19 $ 117,022 $ 176,008 $ (358) $ (91,465) $ 201,226
Beginning balance, shares at Aug. 31, 2011 18,948,868       2,580,955  
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   5,710       5,710
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 259,977          
Stock-based compensation   2,769       2,769
Tax benefits from settlements of stock-based equity awards   709       709
Cash dividends     (18,228)     (18,228)
Acquisition of treasury stock         (39,840) (39,840)
Acquisition of treasury stock, shares         930,356  
Foreign currency translation adjustment       (2,369)   (2,369)
Net income     35,485     35,485
Ending balance at Aug. 31, 2012 19 126,210 193,265 (2,727) (131,305) 185,462
Ending balance, shares at Aug. 31, 2012 19,208,845       3,511,311  
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   3,685       3,685
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 184,134          
Stock-based compensation   2,453       2,453
Tax benefits from settlements of stock-based equity awards   891       891
Cash dividends     (19,044)     (19,044)
Acquisition of treasury stock         (31,437) (31,437)
Acquisition of treasury stock, shares         596,132  
Foreign currency translation adjustment       (2,316)   (2,316)
Net income     39,813     39,813
Ending balance at Aug. 31, 2013 19 133,239 214,034 (5,043) (162,742) 179,507
Ending balance, shares at Aug. 31, 2013 19,392,979       4,107,443  
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes   (129)       (129)
Issuance of common stock under share-based compensation plan, net of shares withheld for taxes, shares 71,331          
Stock-based compensation   2,263       2,263
Tax benefits from settlements of stock-based equity awards   839       839
Cash dividends     (20,184)     (20,184)
Acquisition of treasury stock         (42,773) (42,773)
Acquisition of treasury stock, shares         602,505  
Foreign currency translation adjustment       6,146   6,146
Net income     43,746     43,746
Ending balance at Aug. 31, 2014 $ 19 $ 136,212 $ 237,596 $ 1,103 $ (205,515) $ 169,415
Ending balance, shares at Aug. 31, 2014 19,464,310       4,709,948