Summary of Significant Accounting Policies - Components of Revenue Streams, Timing of Satisfying Performance Obligations, and Amounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021		Dec. 31, 2020
Product Information [Line Items]
Management, transaction, and other fees	$ 25,851	$ 40,337		$ 26,501
Property management services [Member]
Product Information [Line Items]
Management, transaction, and other fees	$ 13,470	14,415		14,444
Timing of satisfaction of performance obligations	Over time
Asset management services [Member]
Product Information [Line Items]
Management, transaction, and other fees	$ 6,752	6,921		6,963
Timing of satisfaction of performance obligations	Over time
Promote income [Member]
Product Information [Line Items]
Management, transaction, and other fees	$ 13,600	13,589	[1]
Timing of satisfaction of performance obligations	Over time
Leasing services [Member]
Product Information [Line Items]
Management, transaction, and other fees	$ 3,945	4,096		3,150
Timing of satisfaction of performance obligations	Point in time
Other transaction fees [Member]
Product Information [Line Items]
Management, transaction, and other fees	$ 1,684	$ 1,316		$ 1,944
Timing of satisfaction of performance obligations	Point in time

[1] The Company recognized $13.6 million in promote revenue during the year ended December 31, 2021, for exceeding partnership return thresholds from the Company's performance as managing member in the USAA partnership. The consideration was paid in the form of a real estate asset.