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Subsequent Events Subsequent Event (Details) - $ / shares
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 06, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Subsequent Event [Line Items]          
Common Stock, Dividends, Per Share, Declared   $ 0 $ 0 $ 0.43 $ 0.41
Subsequent Event [Member]          
Subsequent Event [Line Items]          
Dividends Payable, Date Declared Nov. 05, 2019        
Common Stock, Dividends, Per Share, Declared $ 0.43        
Dividends Payable, Date to be Paid Dec. 13, 2019        
Dividends Payable, Date of Record Nov. 15, 2019