Commitments and Contingencies - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) property Lease community	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) property Lease community	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Number of office leases | Lease	13		13
Operating lease assets	$ 107,144		$ 107,144		$ 114,977
Operating lease obligation	134,425		134,425		142,602
Operating lease expense	4,081	$ 3,987	12,167	$ 11,657
Finance lease asset	28,635		28,635		28,354
Finance lease obligation	$ 20,026		$ 20,026		$ 20,069
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