COVID-19 Pandemic - Narrative (Details) - COVID-19	3 Months Ended
	Mar. 31, 2021
Unusual or Infrequent Item, or Both [Line Items]
Rent collected, percent	95.00%
Office
Unusual or Infrequent Item, or Both [Line Items]
Rent collected, percent	100.00%
Retail
Unusual or Infrequent Item, or Both [Line Items]
Rent collected, percent	87.00%
Residential
Unusual or Infrequent Item, or Both [Line Items]
Rent collected, percent	99.00%