COMPONENTS OF RENTAL INCOME AND EXPENSE - Component of Rental Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Rental Income [Line Items]
Percentage rent	$ 1,353	$ 553	$ 1,677	$ 1,108
Hotel revenue	4,680	11,257	13,948	30,365
Other	527	493	1,628	1,401
Total rental income	80,759	93,147	252,059	249,634
Recognition of straight-line rents	6,000	5,200	17,300	900
Recognition of amortization of above and below market leases	900	1,100	2,800	2,800
Office
Rental Income [Line Items]
Lease rental income	43,193	40,187	127,890	94,899
Retail
Rental Income [Line Items]
Lease rental income	18,334	25,065	64,198	74,535
Multifamily
Rental Income [Line Items]
Lease rental income	11,770	11,723	35,380	35,694
Mixed-use
Rental Income [Line Items]
Lease rental income	$ 902	$ 3,869	$ 7,338	$ 11,632