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Subsequent Event (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Dec. 31, 2019
Nov. 30, 2019
Nov. 30, 2018
Jan. 09, 2020
Subsequent Event [Line Items]        
Borrowings on credit facility   $ 0.0 $ 55.4  
Unsecured Delayed Draw Term Loan | Lines of Credit | Subsequent Event        
Subsequent Event [Line Items]        
Borrowings on credit facility $ 400.0      
Additional borrowing capacity under revolving credit facility       $ 396.2