Leases - Additional Information (Details)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Residential Apartment Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	97.00%	97.00%
Retail Commercial Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	3.00%	3.00%
Retail Commercial Leases [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Retail leases term	5 years
Retail Commercial Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	10 years