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Subsequent Events (Details) - $ / shares
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Subsequent Event [Line Items]        
Dividends declared, in dollars per share   $ 0.075 $ 0.070 $ 0.070
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Dividends Payable, Date Declared Oct. 21, 2015      
Dividends declared, in dollars per share $ 0.02      
Dividends Payable, Date to be Paid Nov. 20, 2015      
Dividends Payable, Date of Record Nov. 10, 2015