ORGANIZATION AND BASIS OF PRESENTATION (Details) - Entity [Domain] $ in Thousands	6 Months Ended
	Jun. 30, 2015 USD ($) opportunity_fund property	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties)	145
Number of opportunity funds | opportunity_fund	4
Brandywine Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Noncontrolling interest, ownership percentage		77.78%
Core Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties)	89
Opportunity Funds
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties)	56
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	95.00%
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%
Mortgages
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument face amount | $	$ 171,765
Non-Recourse Mortgage Debt Due 2016 | Mortgages
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Debt instrument face amount | $	$ 26,300