COMMITMENTS AND CONTINGENCIES (Details) ft² in Millions	1 Months Ended	3 Months Ended
	Apr. 29, 2020 USD ($)	Mar. 31, 2020 USD ($) ft² mall	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Real estate redevelopment in process		$ 52,800,000
Estimated cost to complete development and redevelopment projects		16,000,000.0
Delayed construction		300,000,000
Insurance coverage, general liability insurance, limit per occurrence		200,000,000
Insurance coverage, rental value insurance, limit per occurrence		500,000,000
Insurance coverage, pollution insurance, limit per occurence		50,000,000
Reversal of provision for doubtful accounts		(1,424,000)	$ (485,000)
Deferred lease expense		$ 1,000,000.0		$ 2,700,000
Area of real estate property (in sq ft) | ft²		15.1
Puerto Rico
Loss Contingencies [Line Items]
Number of malls | mall		2
Puerto Rico | Hurricane Maria
Loss Contingencies [Line Items]
Insurance coverage, rental value insurance, limit per occurrence		$ 147,000,000
Subsequent Event | Pandemic-Related Contingencies
Loss Contingencies [Line Items]
Leasable area, gross, percent	55.00%
Rents received, percent	56.00%
Proceeds from Rents Received	$ 15,800,000