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Equity Dividend Policy (Details) - $ / shares
1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2016
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dividend Policy [Abstract]              
Common Stock, Dividends, Per Share, Declared $ 0.09            
Cash dividends declared per share   $ 0.09 $ 0.09 $ 0.09 $ 0.09 $ 0.27 $ 0.27