INCOME TAXES (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) mall	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) mall	Sep. 30, 2017 USD ($)
Income Tax Contingency [Line Items]
Income tax expense	$ 115	$ 318	$ 741	$ 942
Puerto Rico
Income Tax Contingency [Line Items]
Number of malls | mall	2		2
Commonwealth of Puerto Rico
Income Tax Contingency [Line Items]
Income tax expense	$ 100	$ 300	$ 500	$ 900
Non-resident withholding tax percentage			29.00%
Allentown, PA
Income Tax Contingency [Line Items]
Income tax expense	$ 200
Vornado
Income Tax Contingency [Line Items]
Percentage of taxable income distributed as dividends to stockholders			100.00%