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MORTGAGES PAYABLE - Additional Information (Details)			1 Months Ended		9 Months Ended
	Jun. 09, 2016 USD ($)	Jan. 15, 2015 USD ($) extension_option	Jun. 30, 2016 USD ($)	Jan. 31, 2015 USD ($) debt_tranche	Sep. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jan. 06, 2015 USD ($)
Debt Instrument [Line Items]
Net carrying amount of real estate collateralizing indebtedness					$ 863,300,000
Deferred Finance Costs, Gross					2,177,000		$ 2,800,000
Mortgages payable, net					1,201,466,000		1,233,983,000
Mortgages
Debt Instrument [Line Items]
Mortgages payable, net					1,201,466,000		1,233,983,000
Unamortized debt issuance costs					8,528,000		9,974,000
Mortgages | First Mortgage | Montehiedra Town Center
Debt Instrument [Line Items]
Face amount of debt instrument				$ 120,000,000				$ 120,000,000
Interest rate				6.04%				6.04%
Number of debt tranches | debt_tranche				2
Lender fees				$ 2,000,000
Mortgages | Senior Notes [Member] | Montehiedra Town Center
Debt Instrument [Line Items]
Unamortized debt issuance costs							$ 1,681,000
Intercompany Loans | Montehiedra Town Center
Debt Instrument [Line Items]
Face amount of debt instrument				$ 20,000,000		$ 20,000,000
Interest rate				10.00%
Mortgages payable, net					$ 14,500,000
Revolving Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 500,000,000
Term of debt instrument		4 years
Number of extension options | extension_option		2
Term of each extension option		6 months
Annual facility fee (in percent)		20.00%
Revolving Credit Agreement | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Financial covenants, maximum leverage ratio		0.6
Revolving Credit Agreement | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Financial covenants, minimum fixed charge coverage ratio		1.5
Revolving Credit Agreement | Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Interest rate spread on variable rate		1.15%
Senior Loan | Mortgages | First Mortgage | Montehiedra Town Center
Debt Instrument [Line Items]
Face amount of debt instrument				$ 90,000,000
Interest rate				5.33%	5.33%
Junior Loan | Mortgages | First Mortgage | Montehiedra Town Center
Debt Instrument [Line Items]
Face amount of debt instrument				$ 30,000,000
Interest rate				3.00%	3.00%
Variable Rate | Mortgages | Cross Collateralized
Debt Instrument [Line Items]
Interest rate					2.36%
Variable Rate | LIBOR | Mortgages | Cross Collateralized
Debt Instrument [Line Items]
Interest rate spread on variable rate					136.00%
Prepayment of mortgage	$ 21,200,000		$ 21,200,000

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