Commitments and Contingencies - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) community Lease property	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Lessee, Lease, Description [Line Items]
Number of office leases | Lease	12
Operating lease assets	$ 120,004		$ 118,370
Operating lease obligation	147,866		146,377
Operating lease expense	3,706	$ 3,827
Finance lease asset	28,285		28,229
Finance lease obligation	$ 20,107		$ 20,120
Properties on Land Subject to Land Leases
Lessee, Lease, Description [Line Items]
Number of operating apartment communities owned | community	7
Number of commercial properties owned | property	2
Assets Held under Operating Leases
Lessee, Lease, Description [Line Items]
Number of operating apartment communities owned | community	6
Assets Held under Finance Leases
Lessee, Lease, Description [Line Items]
Number of operating apartment communities owned | community	1
Number of finance leases for parking garages adjacent to communities | Lease	4