MORTGAGES PAYABLE - Summary of Mortgages Payable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Aug. 29, 2024	May 03, 2024	Mar. 28, 2024	Mar. 27, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Gain on extinguishment of debt, net	$ 0	$ 43,029	$ 21,427	$ 42,540
Mortgages | First Mortgage
Debt Instrument [Line Items]
Total mortgages payable	1,573,639		1,573,639						$ 1,590,735
Less: Union (Vauxhall - held for sale)	$ (44,592)		$ (44,592)
Interest Rate, properties held for sale	(4.01%)		(4.01%)
Total mortgages payable, excluding held for sale	$ 1,529,047		$ 1,529,047						1,590,735
Total unamortized debt issuance costs	(13,858)		(13,858)						(12,625)
Less: Union (Vauxhall - held for sale) unamortized debt issuance costs	190		190
Total mortgages payable, net excluding held for sale	1,515,379		1,515,379						1,578,110
Mortgages | First Mortgage | Ledgewood Commons
Debt Instrument [Line Items]
Effective Interest Rate						6.03%
Mortgages | First Mortgage | Variable rate
Debt Instrument [Line Items]
Total mortgages payable	$ 51,253		$ 51,253						102,904
Mortgages | First Mortgage | Variable rate | Hudson Commons
Debt Instrument [Line Items]
Effective Interest Rate	0.00%		0.00%
Total mortgages payable	$ 0		$ 0						26,930
Mortgages | First Mortgage | Variable rate | Gun Hill Commons
Debt Instrument [Line Items]
Effective Interest Rate	0.00%		0.00%
Total mortgages payable	$ 0		$ 0						23,696
Mortgages | First Mortgage | Variable rate | The Plaza at Woodbridge
Debt Instrument [Line Items]
Effective Interest Rate	5.26%		5.26%
Total mortgages payable	$ 51,253		$ 51,253						$ 52,278
Interest rate cap	3.00%		3.00%
Mortgages | First Mortgage | Variable rate | The Plaza at Woodbridge | Interest Rate Cap
Debt Instrument [Line Items]
Effective Interest Rate									5.26%
Mortgages | First Mortgage | Variable rate | The Plaza at Woodbridge | SOFR
Debt Instrument [Line Items]
Interest rate spread on variable rate			226.00%
Mortgages | First Mortgage | Variable rate | Greenbrook Commons
Debt Instrument [Line Items]
Effective Interest Rate	6.03%		6.03%
Total mortgages payable	$ 31,000		$ 31,000						$ 25,065
Term					5 years
Mortgages | First Mortgage | Variable rate | Montclair, NJ | SOFR
Debt Instrument [Line Items]
Interest rate spread on variable rate			257.00%
Mortgages | First Mortgage | Fixed rate
Debt Instrument [Line Items]
Total mortgages payable	$ 1,522,386		$ 1,522,386						1,487,831
Mortgages | First Mortgage | Fixed rate | Brick Commons
Debt Instrument [Line Items]
Effective Interest Rate	3.87%		3.87%
Total mortgages payable	$ 46,941		$ 46,941						47,683
Mortgages | First Mortgage | Fixed rate | West End Commons
Debt Instrument [Line Items]
Effective Interest Rate	3.99%		3.99%
Total mortgages payable	$ 23,839		$ 23,839						24,196
Mortgages | First Mortgage | Fixed rate | Town Brook Commons
Debt Instrument [Line Items]
Effective Interest Rate	3.78%		3.78%
Total mortgages payable	$ 29,767		$ 29,767						30,229
Mortgages | First Mortgage | Fixed rate | Rockaway River Commons
Debt Instrument [Line Items]
Effective Interest Rate	3.78%		3.78%
Total mortgages payable	$ 26,354		$ 26,354						26,763
Mortgages | First Mortgage | Fixed rate | Hanover Commons
Debt Instrument [Line Items]
Effective Interest Rate	4.03%		4.03%
Total mortgages payable	$ 60,453		$ 60,453						61,324
Mortgages | First Mortgage | Fixed rate | Tonnelle Commons
Debt Instrument [Line Items]
Effective Interest Rate	4.18%		4.18%
Total mortgages payable	$ 95,750		$ 95,750						97,115
Mortgages | First Mortgage | Fixed rate | Manchester Plaza
Debt Instrument [Line Items]
Effective Interest Rate	4.32%		4.32%
Total mortgages payable	$ 12,500		$ 12,500						12,500
Mortgages | First Mortgage | Fixed rate | Millburn Gateway Center
Debt Instrument [Line Items]
Effective Interest Rate	3.97%		3.97%
Total mortgages payable	$ 21,651		$ 21,651						22,015
Mortgages | First Mortgage | Fixed rate | Totowa Commons
Debt Instrument [Line Items]
Effective Interest Rate	4.33%		4.33%
Total mortgages payable	$ 50,800		$ 50,800						50,800
Mortgages | First Mortgage | Fixed rate | Woodbridge Commons
Debt Instrument [Line Items]
Total mortgages payable									22,100
Mortgages | First Mortgage | Fixed rate | Woodbridge Commons | Interest Rate Cap
Debt Instrument [Line Items]
Effective Interest Rate	4.36%		4.36%
Total mortgages payable	$ 22,100		$ 22,100
Mortgages | First Mortgage | Fixed rate | Brunswick Commons
Debt Instrument [Line Items]
Effective Interest Rate	4.38%		4.38%
Total mortgages payable	$ 63,000		$ 63,000						63,000
Mortgages | First Mortgage | Fixed rate | Rutherford Commons
Debt Instrument [Line Items]
Effective Interest Rate	4.49%		4.49%
Total mortgages payable	$ 23,000		$ 23,000						23,000
Mortgages | First Mortgage | Fixed rate | Kingswood Center
Debt Instrument [Line Items]
Effective Interest Rate	0.00%		0.00%
Total mortgages payable	$ 0		$ 0						69,054
Mortgages | First Mortgage | Fixed rate | Hackensack Commons
Debt Instrument [Line Items]
Effective Interest Rate	4.36%		4.36%
Total mortgages payable	$ 66,400		$ 66,400						66,400
Mortgages | First Mortgage | Fixed rate | Marlton Commons
Debt Instrument [Line Items]
Effective Interest Rate	3.86%		3.86%
Total mortgages payable	$ 36,202		$ 36,202						36,725
Mortgages | First Mortgage | Fixed rate | Union (Vauxhall)
Debt Instrument [Line Items]
Effective Interest Rate	4.01%		4.01%
Total mortgages payable	$ 44,592		$ 44,592						45,202
Mortgages | First Mortgage | Fixed rate | Yonkers Gateway Center
Debt Instrument [Line Items]
Effective Interest Rate							6.30%
Total mortgages payable							$ 50,000	$ 22,700	23,148
Term	5 years		5 years				5 years
Mortgages | First Mortgage | Fixed rate | The Shops at Riverwood
Debt Instrument [Line Items]
Effective Interest Rate	4.25%		4.25%
Total mortgages payable	$ 21,051		$ 21,051						21,326
Mortgages | First Mortgage | Fixed rate | Shops at Bruckner
Debt Instrument [Line Items]
Effective Interest Rate	6.00%		6.00%
Total mortgages payable	$ 37,473		$ 37,473						37,817
Mortgages | First Mortgage | Fixed rate | Huntington Commons
Debt Instrument [Line Items]
Effective Interest Rate	6.29%		6.29%
Total mortgages payable	$ 43,704		$ 43,704						43,704
Mortgages | First Mortgage | Fixed rate | Bergen Town Center
Debt Instrument [Line Items]
Effective Interest Rate	6.30%		6.30%
Total mortgages payable	$ 290,000		$ 290,000						290,000
Mortgages | First Mortgage | Fixed rate | The Outlets at Montehiedra | Senior Loan
Debt Instrument [Line Items]
Effective Interest Rate	5.00%		5.00%
Total mortgages payable	$ 74,073		$ 74,073						$ 75,590
Mortgages | First Mortgage | Fixed rate | Montclair, NJ
Debt Instrument [Line Items]
Effective Interest Rate	3.15%		3.15%						3.15%
Total mortgages payable	$ 7,250		$ 7,250						$ 7,250
Mortgages | First Mortgage | Fixed rate | Garfield Commons
Debt Instrument [Line Items]
Effective Interest Rate	4.14%		4.14%
Total mortgages payable	$ 39,069		$ 39,069						39,607
Mortgages | First Mortgage | Fixed rate | Woodmore Towne Centre
Debt Instrument [Line Items]
Effective Interest Rate	3.39%		3.39%
Total mortgages payable	$ 117,200		$ 117,200						117,200
Mortgages | First Mortgage | Fixed rate | Newington Commons
Debt Instrument [Line Items]
Effective Interest Rate	6.00%		6.00%
Total mortgages payable	$ 15,770		$ 15,770						15,920
Mortgages | First Mortgage | Fixed rate | Shops At Caguas
Debt Instrument [Line Items]
Effective Interest Rate	6.60%		6.60%
Total mortgages payable	$ 81,876		$ 81,876						82,000
Mortgages | First Mortgage | Fixed rate | Briarcliff Commons
Debt Instrument [Line Items]
Effective Interest Rate	5.47%		5.47%
Total mortgages payable	$ 30,000		$ 30,000
Mortgages | First Mortgage | Fixed rate | Mount Kisco Commons
Debt Instrument [Line Items]
Effective Interest Rate	6.40%		6.40%
Total mortgages payable	$ 10,571		$ 10,571						$ 11,098