ORGANIZATION AND BASIS OF PRESENTATION (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) property	Jun. 30, 2015 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties) | property	151
Brandywine Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Noncontrolling interest, ownership percentage		77.78%
Impairment of asset		$ 5,000,000
Core Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties) | property	92
Opportunity Funds
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties) | property	59
Operating Partnership | Brandywine Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Impairment of asset		$ 1,100,000
Mortgages
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument face amount	$ 1,463,000
Non-Recourse Mortgage Debt Due 2016 | Mortgages
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument face amount	$ 26,300,000.0
Operating Partnership, as General Partner or Managing Member
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership interest by general partner or managing partner	94.00%
Remaining funds rate of distribution to partnership	20.00%
Institutional Investors
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Remaining funds rate of distribution to all partners	80.00%