Summary of Outstanding Mortgages, Excluding Net Debt Premium (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Total mortgages notes payable, non-recourse to us, net		$ 40,119	$ 44,725
Nonrecourse
Debt Instrument [Line Items]
Outstanding Balance	[1]	40,341
Less net financing fees	[1]	(250)
Plus net debt premium	[1]	28
Total mortgages notes payable, non-recourse to us, net	[1]	40,119
2704 North Tenaya Way Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Outstanding Balance	[1],[2]	$ 6,209
Interest Rate	[2]	4.95%
Maturity Date	[2]	2023-11
Summerlin Hospital Medical Office Building III Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Outstanding Balance	[1],[2]	$ 12,474
Interest Rate	[2]	4.03%
Maturity Date	[2]	2024-04
Tuscan Professional Building Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Outstanding Balance	[1]	$ 1,558
Interest Rate		5.56%
Maturity Date		2025-06
Phoenix Children East Valley Care Center Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Outstanding Balance	[1]	$ 8,136
Interest Rate		3.95%
Maturity Date		2030-01
Rosenberg Children's Medical Plaza Fixed Rate Mortgage Loan | Nonrecourse
Debt Instrument [Line Items]
Outstanding Balance	[1]	$ 11,964
Interest Rate		4.42%
Maturity Date		2033-09

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

[2] 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.