XML 34 R67.htm IDEA: XBRL DOCUMENT v3.3.0.814
Stock-based Compensation (Stock Options) (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Income tax benefit (expense) from stock-based award $ 1,208 $ 839 $ 891
Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Outstanding, Number of Shares 130,065    
Exercised, Number of Shares (67,445)    
Outstanding, Number of Shares 62,620 130,065  
Exercisable, Number of Shares 62,620    
Outstanding, Weighted-Average Exercise Price $ 33.07    
Exercised, Weighted-Average Exercise Price 31.30    
Outstanding, Weighted-Average Exercise Price 34.97 $ 33.07  
Exercisable, Weighted-Average Exercise Price $ 34.97    
Outstanding, Weighted-Average Remaining Contractual Term 1 year 7 months 6 days    
Exercisable, Weighted-Average Remaining Contractual Term 1 year 7 months 6 days    
Outstanding, Aggregate Intrinsic Value $ 3,054    
Exercisable, Aggregate Intrinsic Value 3,054    
Total intrinsic value of stock options exercised 3,300 $ 1,400 3,200
Income tax benefit (expense) from stock-based award $ 1,100 $ 400 $ 900