Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Lessee, Lease, Description [Line Items]
Straight line rent adjustment				$ 49,241
Rental and other revenues related to operating lease payments	$ 361,983	$ 357,984	$ 1,079,784	1,015,550
Rental and other revenues related to operating lease payments, variable leases			145,541	134,632
Seniors Housing Operating
Lessee, Lease, Description [Line Items]
Rental and other revenues related to operating lease payments			304,338	100,328
Resident fees and services
Lessee, Lease, Description [Line Items]
Revenue from contract with customer	$ 1,068,706	$ 835,617	$ 3,073,040	$ 2,299,972
Minimum
Lessee, Lease, Description [Line Items]
Lease term extension period			1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term extension period			25 years