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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
Nov. 07, 2019
Oct. 22, 2019
Oct. 07, 2019
Mar. 12, 2019
Feb. 15, 2019
Sep. 30, 2019
Jul. 26, 2019
Jul. 22, 2019
Mar. 11, 2019
Feb. 28, 2019
Feb. 14, 2019
Subsequent Event [Line Items]                      
Dividend Per Share (USD per share)                 $ 0.14   $ 0.41
Common shares           $ 0.001       $ 0.001  
Declared date       Mar. 11, 2019 Feb. 14, 2019            
Payment Date       Apr. 25, 2019 Mar. 15, 2019            
Record Date       Mar. 29, 2019 Mar. 01, 2019            
Proceeds from issuance of shares, net             $ 9.1 $ 60.7      
Subsequent Event [Member]                      
Subsequent Event [Line Items]                      
Dividend Per Share (USD per share) $ 0.14   $ 0.14                
Declared date Nov. 07, 2019   Oct. 07, 2019                
Payment Date Dec. 26, 2019   Nov. 25, 2019                
Record Date Nov. 29, 2019   Oct. 31, 2019                
Stock Issued During Period, Shares, New Issues   4,600,000                  
Preferred Stock, Dividend Rate, Percentage   6.75%                  
Preferred Stock, Par or Stated Value Per Share   $ 0.001                  
Preferred Stock, Liquidation Preference Per Share   $ 25.00                  
Preferred Stock Dividend Rate Variable Rate Spread   5.196%                  
Proceeds from Issuance of Preferred Stock and Preference Stock   $ 111.0                  
Over-Allotment Option [Member] | Subsequent Event [Member]                      
Subsequent Event [Line Items]                      
Stock Issued During Period, Shares, New Issues   600,000