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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Nov. 01, 2019
Oct. 24, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Subsequent Event [Line Items]              
Cash dividends declared per common share (in dollars per share)     $ 0.23 $ 0.22 $ 0.68 $ 0.65 $ 0.22
Subsequent Event              
Subsequent Event [Line Items]              
Cash dividends declared per common share (in dollars per share)   $ 0.23          
Dividends   $ 10.2          
Net Proceeds from Sale of the Facility $ 9.5            
Gains (Losses) on Sale of the Facility $ 5.6