Fair Value of Financial Instruments - Summary of Fair Value Information of Financial Instruments (Parenthetical) (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) Health_Center	Dec. 31, 2022 USD ($)
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Mortgage loans	$ 299,326	$ 364,101
Investments in unconsolidated real estate joint ventures	1,487,118	1,497,903
Investments in unconsolidated operating entities	1,812,150	1,444,872
Loans [Member]
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Investments in unconsolidated operating entities	535,200	640,400
Other loans	196,600	225,500
Shareholder Loan [Member]
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Mortgage loans	162,900	223,800
Investments in unconsolidated real estate joint ventures	$ 321,900	$ 315,900
Fair Value, Recurring [Member] | Colombia [Member]
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Number of facilities acquired | Health_Center	3
Fair Value, Recurring [Member] | Acquisition Loans [Member] | Colombia [Member]
Financial Instruments Measured At Fair Value On Recurring Basis [Line Items]
Number of facilities acquired | Health_Center	3