Credit Concentration - Summary of Credit Concentration (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Concentration Risk [Line Items]
Total NOI	$ 2,690,219	$ 2,301,845	$ 1,967,553
Percentage total investments with top five customers		30.00%
Revenues	6,637,995	$ 5,860,615	$ 4,742,115
Real estate loans receivable, net of credit allowance	1,361,587	$ 890,844
Sunrise Senior Living
Concentration Risk [Line Items]
Revenues	$ 793,920
Net Operating Income | Credit Concentration Risk
Concentration Risk [Line Items]
Number of properties | property	1,901
Total NOI	$ 2,690,219
Percent of NOI	100.00%
Net Operating Income | Credit Concentration Risk | Integra Healthcare Properties
Concentration Risk [Line Items]
Number of properties | property	147
Total NOI	$ 215,466
Percent of NOI	8.00%
Net Operating Income | Credit Concentration Risk | Sunrise Senior Living
Concentration Risk [Line Items]
Number of properties | property	88
Total NOI	$ 150,801
Percent of NOI	6.00%
Net Operating Income | Credit Concentration Risk | Cogir Management Corporation
Concentration Risk [Line Items]
Number of properties | property	120
Total NOI	$ 112,571
Percent of NOI	4.00%
Net Operating Income | Credit Concentration Risk | Avery Healthcare
Concentration Risk [Line Items]
Number of properties | property	84
Total NOI	$ 100,017
Percent of NOI	4.00%
Net Operating Income | Credit Concentration Risk | Oakmont Management Group
Concentration Risk [Line Items]
Number of properties | property	64
Total NOI	$ 94,487
Percent of NOI	4.00%
Net Operating Income | Credit Concentration Risk | Remaining portfolio
Concentration Risk [Line Items]
Number of properties | property	1,398
Total NOI	$ 2,016,877
Percent of NOI	74.00%