Real Estate Assets - Table of Properties Acquired (Details)	Sep. 30, 2020 ft²	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019 ft²
Business Acquisition
Number of units in real estate property	680	12,936	12,256
Net Rentable Area	161,526			913,732
Parkside at the Beach [Member]
Business Acquisition
Number of units in real estate property	288
Horizon At Wiregrass [Member]
Business Acquisition
Number of units in real estate property	392
wakefield crossing [Domain]
Business Acquisition
Net Rentable Area	75,927
Midway Market
Business Acquisition
Net Rentable Area	85,599
Gayton Crossing
Business Acquisition
Net Rentable Area				158,316
Free State Shopping Center
Business Acquisition
Net Rentable Area				264,152
Disston Plaza
Business Acquisition
Net Rentable Area				129,150
Polo Grounds Mall
Business Acquisition
Net Rentable Area				130,285
Fairfield Shopping Center [Member]
Business Acquisition
Net Rentable Area				231,829