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Dispositions and Held for Sale- Summary (Details) - USD ($)
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Gain on sales of real estate assets $ 140,000 $ 228,000
Outparcel Sale    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Gain on sales of real estate assets $ 140,000