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Subsequent Events (Details) - $ / shares
3 Months Ended
Dec. 13, 2016
Dec. 12, 2016
Nov. 30, 2016
Nov. 30, 2015
Subsequent Events [Line Items]        
Percentage increase in quarterly cash dividend 17.00%      
Cash dividend declared   $ 0.42 $ 0.42 $ 0.38
Dividend payable, declared date     Dec. 13, 2016  
Dividends payable, date to be paid     Jan. 31, 2017  
Dividend payable, record date     Jan. 20, 2017  
Subsequent Events [Member]        
Subsequent Events [Line Items]        
Cash dividend declared $ 0.49