SEGMENT REPORTING - Capital Expenditures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Capital Expenditures	$ 21,142	$ 27,155	$ 70,228	$ 94,467
Office
Segment Reporting Information [Line Items]
Capital Expenditures	16,105	24,107	56,642	80,824
Retail
Segment Reporting Information [Line Items]
Capital Expenditures	1,628	2,165	5,798	9,422
Multifamily
Segment Reporting Information [Line Items]
Capital Expenditures	1,977	686	4,506	3,572
Mixed-use
Segment Reporting Information [Line Items]
Capital Expenditures	$ 1,432	$ 197	$ 3,282	$ 649