Segment Information - Summary of third-party real estate services (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Information
Third-party real estate services revenue, excluding reimbursements	$ 32,804	$ 45,922	$ 43,704
Net third-party real estate services, excluding reimbursements	(4,032)	3,519	(3,630)
Third-Party Real Estate Services Segment
Segment Information
Third-party real estate services revenue, excluding reimbursements	32,804	45,922	43,704
Third-party real estate services expenses, excluding reimbursements	36,836	42,403	47,334
Net third-party real estate services, excluding reimbursements	(4,032)	3,519	(3,630)
Property management fees | Third-Party Real Estate Services Segment
Segment Information
Third-party real estate services revenue, excluding reimbursements	16,138	18,983	18,001
Asset management fees | Third-Party Real Estate Services Segment
Segment Information
Third-party real estate services revenue, excluding reimbursements	4,088	4,925	5,994
Development fees | Third-Party Real Estate Services Segment
Segment Information
Third-party real estate services revenue, excluding reimbursements	2,573	10,253	8,325
Leasing fees | Third-Party Real Estate Services Segment
Segment Information
Third-party real estate services revenue, excluding reimbursements	3,757	5,538	6,001
Construction management fees | Third-Party Real Estate Services Segment
Segment Information
Third-party real estate services revenue, excluding reimbursements	1,210	1,383	521
Other service revenue | Third-Party Real Estate Services Segment
Segment Information
Third-party real estate services revenue, excluding reimbursements	$ 5,038	$ 4,840	$ 4,862