Leases - Summary of Lease Income Types Relating to Lease Payments Along With the Total Other Rental Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
Total lease revenue	$ 2,364,447	$ 2,464,790	$ 2,593,829
Rental income	2,463,997	2,571,705	2,700,691
Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	2,298,099	2,417,557	2,521,396
Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	66,348	47,233	72,433
Residential and Non-Residential Rent [Member]
Operating Leased Assets [Line Items]
Total lease revenue	2,261,019	2,388,441	2,486,189
Residential and Non-Residential Rent [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	2,199,986	2,336,778	2,414,201
Residential and Non-Residential Rent [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	61,033	51,663	71,988
Utility Recoveries (RUBS Income) [Member]
Operating Leased Assets [Line Items]
Total lease revenue	75,569	71,376	68,576
Utility Recoveries (RUBS Income) [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	74,846	70,699	67,659
Utility Recoveries (RUBS Income) [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	723	677	917
Parking Rent [Member]
Operating Leased Assets [Line Items]
Total lease revenue	41,499	39,155	37,905
Parking Rent [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	40,934	38,743	37,557
Parking Rent [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	565	412	348
Other Lease Revenue [Member]
Operating Leased Assets [Line Items]
Total lease revenue	(13,640)	(34,182)	1,159
Other Lease Revenue [Member] | Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	(17,667)	(28,663)	1,979
Other Lease Revenue [Member] | Non-Residential Leases [Member]
Operating Leased Assets [Line Items]
Total lease revenue	4,027	(5,519)	(820)
Parking Revenue [Member]
Operating Leased Assets [Line Items]
Rental income	26,789	22,210	28,272
Other Revenue [Member]
Operating Leased Assets [Line Items]
Rental income	72,761	84,705	78,590
Other Rental Income [Member]
Operating Leased Assets [Line Items]
Rental income	$ 99,550	$ 106,915	$ 106,862