Commitments and Contingencies - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) community Lease property	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) community Lease property	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Number of office leases | Lease	12		12
Operating lease assets	$ 118,645		$ 118,645		$ 118,370
Operating lease obligation	146,424		146,424		146,377
Operating lease expense	3,964	$ 3,896	7,670	$ 7,723
Finance lease asset	28,528		28,528		28,229
Finance lease obligation	$ 20,095		$ 20,095		$ 20,120
Properties on Land Subject to Land Leases
Lessee, Lease, Description [Line Items]
Number of operating apartment communities owned | community	7		7
Number of commercial properties owned | property	2		2
Assets Held under Operating Leases
Lessee, Lease, Description [Line Items]
Number of operating apartment communities owned | community	6		6
Assets Held under Finance Leases
Lessee, Lease, Description [Line Items]
Number of operating apartment communities owned | community	1		1
Number of finance leases for parking garages adjacent to communities | Lease	4		4