Reportable Segments - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2025 Segment
Segment Reporting [Abstract]
Number of reportable segments	2
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	us-gaap:ExecutiveCommitteeMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	The operating results reviewed by the EC include net operating income (“NOI”), the measure most consistent with U.S. GAAP.  NOI from the Real Estate Segment is calculated directly from the Consolidated Statements of Income as Rental Revenues and Development Management and Other Revenues less Rental Expenses and Other Expenses.  NOI from the Strategic Capital Segment is calculated directly from the Consolidated Statements of Income as Strategic Capital Revenues less Strategic Capital Expenses.  Our EC analyzes the NOI of each reportable segment on a quarterly basis comparing actuals to prior period actuals, along with forecasted future amounts and utilizes operating metrics to understand and evaluate the performance of our operations and to allocate resources.