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Subsequent Events (Narrative) (Details) - $ / shares
12 Months Ended
Oct. 09, 2018
Aug. 31, 2018
Subsequent Events [Line Items]    
Dividend payable, declared date   Oct. 09, 2018
Dividends payable, date to be paid   Oct. 31, 2018
Dividend payable, record date   Oct. 19, 2018
Subsequent Events [Member]    
Subsequent Events [Line Items]    
Cash dividend declared $ 0.54