ORGANIZATION AND BASIS OF PRESENTATION (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of Retail Properties (in properties)	95
Number of Opportunity Funds	3
Business Interruption Insurance Deductible	0.1
Provision for Insurance Deductible Attributable to Loss of Rents	0.1
Proceeds from Insurance Settlement, Investing Activities	6.9
Flood
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Writedown of Asset Carrying Value Resulting From Property Damage	1.4
Fund I and Mervyns I
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner	22.20%
Remaining Funds Rate of Distribution to All Partners		80.00%
Limited Liability Company LLC Or Limited Partnership LP, Members Or Limited Partners, Preferred Return	9.00%
Fund II and Mervyns II
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner	20.00%
Limited Liability Company LLC Or Limited Partnership LP, Members Or Limited Partners, Preferred Return	8.00%
Fund III
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner	19.90%
Limited Liability Company LLC Or Limited Partnership LP, Members Or Limited Partners, Preferred Return	6.00%
Fund IV
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner	23.10%
Equity Method Investment, Third Party Equity Commitments	540.6
Number of Institutional Investors (in institutional investors)	17
Equity Method Investment, Equity Commitment	125.0
Limited Liability Company LLC Or Limited Partnership LP, Members Or Limited Partners, Preferred Return	6.00%
Core Portfolio
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of Retail Properties (in properties)	58
Properties Owned, Percentage	100.00%
Opportunity Funds
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of Retail Properties (in properties)	37
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%
Operating Partnership, as General Partner or Managing Member | Fund I and Mervyns I
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Remaining Funds Rate of Distribution to Partnership		20.00%