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ORGANIZATION AND BASIS OF PRESENTATION (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended
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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.

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
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