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Subsequent Events (Details) - USD ($)
$ in Thousands
4 Months Ended 9 Months Ended
Jan. 31, 2017
Sep. 30, 2016
Sep. 30, 2015
Nov. 02, 2016
Subsequent Event [Line Items]        
Purchase agreement   $ 10,300    
Acquisition costs   57    
Proceeds from notes payable   $ 0 $ 46,000  
Burtonsville Town Square | Subsequent Event        
Subsequent Event [Line Items]        
Earnest money deposit       $ 5,000
Burtonsville Town Square | Subsequent Event | Forecast        
Subsequent Event [Line Items]        
Purchase agreement $ 75,000      
Acquisition costs 1,300      
Proceeds from notes payable $ 40,000