SEGMENT REPORTING - Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Capital expenditures	$ 35,184	$ 24,838	$ 67,312	$ 37,054
Office
Segment Reporting Information [Line Items]
Capital expenditures	30,051	21,343	56,717	30,870
Retail
Segment Reporting Information [Line Items]
Capital expenditures	3,697	1,778	7,257	3,500
Multifamily
Segment Reporting Information [Line Items]
Capital expenditures	1,315	1,033	2,886	1,996
Mixed-use
Segment Reporting Information [Line Items]
Capital expenditures	$ 121	$ 684	$ 452	$ 688