Leases - Additional Information (Details)	6 Months Ended
	Jun. 30, 2020
Residential Apartment Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	97.60%
Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	2.40%
Non-residential Leases [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Retail leases term	5 years
Non-residential Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	10 years