Organization and Significant Accounting Policies - Components of Revenue Streams, Timing of Satisfying Performance Obligations, and Amounts (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Schedule of management, transaction, and other fees [Line Items]
Management, transaction, and other fees	$ 6,038	$ 6,684
Property management services [Member]
Schedule of management, transaction, and other fees [Line Items]
Management, transaction, and other fees	$ 3,458	3,618
Timing of satisfaction of performance obligations	Over time
Asset management services [Member]
Schedule of management, transaction, and other fees [Line Items]
Management, transaction, and other fees	$ 1,629	1,755
Timing of satisfaction of performance obligations	Over time
Leasing services [Member]
Schedule of management, transaction, and other fees [Line Items]
Management, transaction, and other fees	$ 718	996
Timing of satisfaction of performance obligations	Point in time
Other transaction fees [Member]
Schedule of management, transaction, and other fees [Line Items]
Management, transaction, and other fees	$ 233	$ 315
Timing of satisfaction of performance obligations	Point in time