Leases - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026 USD ($) property lease	Mar. 31, 2025 USD ($)	Dec. 31, 2024 property	Dec. 31, 2025 property
Lessee, Lease, Description [Line Items]
Rental income	$ 453,842	$ 461,567
Rental and other revenues related to operating lease payments, variable leases	$ 19,568	57,560
Sales type lease, number of properties | property	6			30
Gain (loss) on real estate dispositions and acquisitions of controlling interests, net	$ 420,400	51,777
Cash proceeds from real estate dispositions	1,717,876	317,663
Reclassification To Sales Type Leases
Lessee, Lease, Description [Line Items]
Gain (loss) on real estate dispositions and acquisitions of controlling interests, net	$ 25,424
28 Properties Disposed | Discontinued Operations, Disposed of by Sale
Lessee, Lease, Description [Line Items]
Property sold | property	28
Cash proceeds from real estate dispositions	$ 454,620
2 Properties Disposed
Lessee, Lease, Description [Line Items]
Number of sales-type leases | lease	2
4 Properties Disposed
Lessee, Lease, Description [Line Items]
Gain (loss) on real estate dispositions and acquisitions of controlling interests, net		2,564
Property sold | property			4
Cash proceeds from real estate dispositions		174,824
30 Properties Disposed
Lessee, Lease, Description [Line Items]
Sales type lease income	$ 8,077	$ 2,111
Sales-Type Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest income	Interest income
Seniors Housing Operating
Lessee, Lease, Description [Line Items]
Rental income	$ 231,571	$ 185,225
Minimum
Lessee, Lease, Description [Line Items]
Lease term extension period (in years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease term extension period (in years)	25 years