Segment Information - Summary of Third-party Asset Management and Real Estate Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	$ 11,487	$ 14,125	$ 35,621	$ 53,120
Reimbursement revenue	10,358	11,717	32,351	37,574
Third-party real estate services revenue, including reimbursements	21,845	25,842	67,972	90,694
Third-party real estate services expenses	21,230	25,542	72,422	80,035
Third-party real estate services revenue less expenses	615	300	(4,450)	10,659
Property management fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	4,791	4,831	14,575	14,549
Asset management fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	1,479	2,145	4,763	6,602
Development fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	1,426	4,032	7,113	22,705
Revenue, Remaining Performance Obligation, Amount	41,100		41,100
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 3,600		$ 3,600
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 months		3 months
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 12,400		$ 12,400
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year		1 year
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 6,800		$ 6,800
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year		1 year
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 18,300		$ 18,300
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 years		3 years
Leasing fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	$ 1,713	1,822	$ 4,590	4,106
Construction management fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	169		356	375
Other service revenue
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	$ 1,909	$ 1,295	$ 4,224	$ 4,783