Quarterly report pursuant to Section 13 or 15(d)

Real Estate - Development/Redevelopment (Details)

v3.8.0.1
Real Estate - Development/Redevelopment (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Real Estate Properties [Line Items]    
Properties under development or held for future development $ 61,712 $ 54,422
The Wellington land parcel [Member]    
Real Estate Properties [Line Items]    
Properties under development or held for future development 36,100  
Riverside Developments [Member]    
Real Estate Properties [Line Items]    
Properties under development or held for future development 20,300  
Spring Vally Retail Center [Member]    
Real Estate Properties [Line Items]    
Properties under development or held for future development $ 5,100