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Subsequent Events (Details)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 06, 2019
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
property
Sep. 30, 2018
USD ($)
Subsequent Event [Line Items]        
Proceeds from sales of operating properties     $ 460,694 $ 161,499
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Various Properties In Georgia, Wisconsin and Florida        
Subsequent Event [Line Items]        
Number of properties in disposal group | property     3  
Assets held for sale     $ 21,800  
Liabilities of assets held for sale     $ 1,800  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Various Properties In Georgia, Wisconsin and Florida | Subsequent Event        
Subsequent Event [Line Items]        
Proceeds from sales of operating properties $ 31,600      
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Various Properties In Georgia, Wisconsin and Florida | Forecast | Subsequent Event        
Subsequent Event [Line Items]        
Disposal group, not discontinued operation, gain (loss) on disposal   $ 10,000