REAL ESTATE SALES - Additional Information (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 18, 2019 USD ($) numberOfProperties subsidiary	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Disposed of by Sale
Real Estate Properties [Line Items]
Cost and expenses		$ 556	$ 34,966	$ 1,698	$ 67,808
Singapore Portfolio
Real Estate Properties [Line Items]
Number of wholly owned subsidiaries (subsidiary) | subsidiary	12
Singapore Portfolio | Disposed of by Sale
Real Estate Properties [Line Items]
Number of real estate properties disposed | numberOfProperties	11
Disposal group, consideration	$ 1,200,000
Cost and expenses	20,000
Disposition fees to affiliates	$ 9,500