XML 108 R94.htm IDEA: XBRL DOCUMENT v3.10.0.1
Share-Based Compensation (Narrative) (Details)
$ in Thousands
12 Months Ended
Aug. 31, 2018
USD ($)
item
shares
Aug. 31, 2017
USD ($)
shares
Aug. 31, 2016
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Pre-tax total unrecognized compensation cost related to nonvested share-based compensation | $ $ 6,600    
Weighted average period to be recognized 2 years 1 month 6 days    
Outstanding stock options vested 27,811 25,285 23,164
Shares outstanding 76,803 122,519 127,286
Allocated Share-based Compensation Expense | $ $ 3,893 $ 3,597 $ 3,060
Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Percentage vested per year 33.00%    
Fair value vested | $ $ 3,200 $ 2,400  
Number of shares vested 34,857 34,312  
Restricted Stock Units Settled In Cash [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares outstanding 6,474 6,709 6,155
Performance Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Number of shares vested 0 0  
Performance Stock Units [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of awards actually earned 0.00%    
Performance Stock Units [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of awards actually earned 200.00%    
Performance Stock Units [Member] | Defined Performance Goal Not Met [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Allocated Share-based Compensation Expense | $ $ 0    
2015 Long-Term Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Plan effective date Jan. 26, 2015    
Maximum number of shares authorized 626,968    
Number of shares available 466,505    
Stock award ratio | item 1    
2015 Long-Term Incentive Plan [Member] | Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock option expire, years 10 years    
Vesting period 4 years    
Percentage vested per year 25.00%    
Non Employee Directors [Member] | Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 9 months