Summary of Outstanding Mortgages, Excluding Net Debt Premium (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023
Debt Instrument [Line Items]
Total mortgage notes payable, non-recourse to us, net		$ 19,349		$ 32,863
Nonrecourse
Debt Instrument [Line Items]
Outstanding Balance		19,512	[1]	33,062
Less net financing fees		(163)	[1]	(199)
Total mortgage notes payable, non-recourse to us, net		$ 19,349	[1]	32,863
Summerlin Hospital Medical Office Building III Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Interest Rate	[2]	4.03%
Maturity Date	[2]	2024-04
Outstanding Balance	[2]	$ 0	[1]	12,301
Tuscan Professional Building Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Interest Rate	[3]	5.56%
Maturity Date	[3]	2025-06
Outstanding Balance	[3]	$ 363	[1]	1,060
Phoenix Children East Valley Care Center Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Interest Rate		3.95%
Maturity Date		2030-01
Outstanding Balance		$ 7,646	[1]	7,930
Rosenberg Children's Medical Plaza Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Interest Rate		4.42%
Maturity Date		2033-09
Outstanding Balance		$ 11,503	[1]	$ 11,771

[1] All mortgage loans require monthly principal payments through maturity and either fully amortize or include a balloon principal payment upon maturity.

[2] This fixed rate mortgage loan was fully repaid on April 10, 2024, utilizing borrowings under our Credit Agreement.

[3] This loan is scheduled to mature within the next twelve months, at which time we will either refinance pursuant to a new mortgage loan or repay the mortgage balance in full utilizing borrowings under our Credit Agreement.