Real Estate and Other Activities - Summary of Investments in Unconsolidated Real Estate Joint Ventures by Operator (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 1,460,373	$ 1,152,927
MEDIAN [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	477,509	517,648
Swiss Medical Network [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	434,323	476,193
Steward (Macquarie Transaction) [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	408,681
Policlinico di Monza [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	82,548	95,468
HM Hospital [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 57,312	$ 63,618