Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Lessee, Lease, Description [Line Items]
Rental and other revenues related to operating lease payments	$ 384,059	$ 356,390
Rental and other revenues related to operating lease payments, variable leases	53,794	48,074
Seniors Housing Operating
Lessee, Lease, Description [Line Items]
Rental and other revenues related to operating lease payments	$ 108,915	$ 94,827
Minimum
Lessee, Lease, Description [Line Items]
Lease term extension period	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term extension period	25 years