Leases - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
COVID-19 [Member]
Operating Leased Assets [Line Items]
Write-off of straight-line rent receivables	$ 0.1	$ 12.9
Decrease in rental revenues	$ 5.7	$ 5.6
Residential Apartment Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	97.00%
Residential Apartment Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	12 months
Non-residential Leases [Member]
Operating Leased Assets [Line Items]
Percentage of rental income	3.00%
Non-residential Leases [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Retail leases term	10 years
Non-residential Leases [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Retail leases term	5 years