Segment Information - Summary of Third-party Asset Management and Real Estate Services (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	$ 65,879	$ 57,280	$ 65,452
Reimbursement revenue	48,124	56,659	55,434
Third-party real estate services revenue, including reimbursements	114,003	113,939	120,886
Third-party real estate services expenses	107,159	114,829	113,495
Third-party real estate services revenue less expenses	6,844	(890)	7,391
Property management fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	19,427	20,178	22,437
Asset management fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	8,468	9,791	14,045
Development fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	25,493	11,496	15,655
Revenue, Remaining Performance Obligation, Amount	48,600
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 13,800
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 12,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	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	$ 6,300
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	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	$ 16,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 16,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Development fees | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Segment Reporting Information
Revenue, Remaining Performance Obligation, Amount	$ 16,500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Leasing fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	$ 5,833	5,594	7,377
Construction management fees
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	512	2,966	1,669
Other service revenue
Segment Reporting Information
Third-party real estate services revenue, excluding reimbursements	$ 6,146	$ 7,255	$ 4,269