Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lessee, Lease, Description [Line Items]
Straight line rent adjustment				$ 49,241
Rental and other revenues related to operating lease payments	$ 361,411	$ 354,723	$ 717,801	657,566
Rental and other revenues related to operating lease payments, variable leases			96,309	89,890
Resident fees and services
Lessee, Lease, Description [Line Items]
Revenue from contract with customer	$ 1,009,999	$ 740,891	2,004,334	1,464,355
Resident fees and services | Seniors Housing Operating
Lessee, Lease, Description [Line Items]
Revenue from contract with customer			$ 198,052	$ 31,918
Minimum
Lessee, Lease, Description [Line Items]
Lease term extension period			1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term extension period			25 years