ORGANIZATION AND BASIS OF PRESENTATION (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties)	106
Number of opportunity funds	4
Fund I and Mervyns I
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership interest by general partner or managing partner	37.78%	[1]
Core Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties)	74
Impairment of real estate	$ 1.5
Long-term debt, collateral	$ 23.1
Core Portfolio | Brandywine Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Equity method investment, ownership percentage	22.22%
Area of real estate property	1,000,000
Opportunity Funds
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of retail properties (in properties)	32
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	99.00%
Remaining funds rate of distribution to partnership	20.00%
Institutional Investors [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Remaining funds rate of distribution to all partners	80.00%

[1] Fund I and Mervyns I have returned all capital and preferred return. The Operating Partnership is now entitled to a Promote on all future cash distributions.