Credit Concentration - Summary of Credit Concentration (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) property	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) property	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Concentration Risk [Line Items]
Total NOI	$ 666,740	$ 561,664	$ 1,976,522	$ 1,722,152
Percentage total investments with top five customers					30.00%
Real estate loans receivable, net of credit allowance	$ 1,181,265		$ 1,181,265		$ 890,844	[1]
Net operating income | Credit Concentration Risk
Concentration Risk [Line Items]
Number of Properties | property	1,815		1,815
Total NOI			$ 1,976,522
Percent of NOI			100.00%
Net operating income | Credit Concentration Risk | Integra Healthcare Properties
Concentration Risk [Line Items]
Number of Properties | property	147		147
Total NOI			$ 161,628
Percent of NOI			8.00%
Net operating income | Credit Concentration Risk | Sunrise Senior Living
Concentration Risk [Line Items]
Number of Properties | property	85		85
Total NOI			$ 118,663
Percent of NOI			6.00%
Net operating income | Credit Concentration Risk | Cogir Management Corporation
Concentration Risk [Line Items]
Number of Properties | property	48		48
Total NOI			$ 70,241
Percent of NOI			4.00%
Net operating income | Credit Concentration Risk | Oakmont Management Group
Concentration Risk [Line Items]
Number of Properties | property	64		64
Total NOI			$ 67,329
Percent of NOI			3.00%
Net operating income | Credit Concentration Risk | Avery Healthcare
Concentration Risk [Line Items]
Number of Properties | property	84		84
Total NOI			$ 65,996
Percent of NOI			3.00%
Net operating income | Credit Concentration Risk | Remaining portfolio
Concentration Risk [Line Items]
Number of Properties | property	1,387		1,387
Total NOI			$ 1,492,665
Percent of NOI			76.00%

[1] The consolidated balance sheet at December 31, 2022 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.