ORGANIZATION, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 properties	Dec. 31, 2010	Dec. 31, 2009
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Number of Retail Properties	82
Impairment of asset	$ 6,925,000	$ 0	$ 0
Business Interruption Insurance Deductible	100,000
Provision for Insurance Deductible Attributable to Loss of Rents	100,000
Proceeds from Insurance Settlement, Investing Activities	6,900,000
Deferred Rent Receivables, Net	22,800,000	16,900,000
Allowance for Doubtful Accounts Receivable	5,300,000	7,200,000
Allowance for Notes, Loans and Financing Receivable	3,276,000	3,036,000	5,943,000
Required Distribution Rate to Maintain REIT Status (in percent)	90.00%
Loss of Anchor Tenant [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Allowance for Notes, Loans and Financing Receivable			1,700,000
Flood [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Impairment of asset	1,400,000
Building [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	30
Property, Plant and Equipment, Useful Life, Maximum	40
Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner (in percent)	99.00%
Fund I and Mervyns I [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Preferred Return (in percent)	9.00%
Remaining Funds Rate of Distribution to All Partners (in percent)	80.00%
Fund I and Mervyns I [Member] | Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner (in percent)	22.20%
Capital Committed by Partners in Partnership Interest	20,000,000
Remaining Funds Rate of Distribution to Operating Partnership (in percent)	20.00%
Fund I and Mervyns I [Member] | Institutional Investors [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Capital Committed by Partners in Partnership Interest	70,000,000
Fund I [Member] | Granville Centre [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Impairment of asset	6,900,000
Fund I [Member] | Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
General Partners' Contributed Capital	16,500,000
Fund I [Member] | Operating Partnership, as General Partner or Managing Member [Member] | Granville Centre [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Impairment of asset	1,500,000
Mervyns I [Member] | Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
General Partners' Contributed Capital	2,700,000
Fund II and Mervyns II [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Capital Committed by Partners in Partnership Interest	300,000,000
Fund II and Mervyns II [Member] | Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner (in percent)	20.00%
Preferred Return (in percent)	8.00%
Fund II [Member] | Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Capital Committed by Partners in Partnership Interest	60,000,000
Managing Members' Contributed Capital	48,800,000
Mervyns II [Member] | Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Managing Members' Contributed Capital	7,600,000
Fund III [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Capital Committed by Partners in Partnership Interest	502,500,000
Fund III [Member] | Operating Partnership, as General Partner or Managing Member [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Ownership Interest By General Partner or Managing Partner (in percent)	19.90%
Capital Committed by Partners in Partnership Interest	100,000,000
Preferred Return (in percent)	6.00%
Managing Members' Contributed Capital	45,100,000
Albertsons [Member]
Organization, Consolidation and Presentation of Financial Statements [Line Items]
Impairment Charge to Investment in Unconsolidated Joint Ventures			$ 3,800,000