Note 2 - Operating Property Activities (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Dec. 31, 2012
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	$ 23,170,000		$ 2,008,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	126,295,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	2,496,000		11,979,000
Impairment of Real Estate	3,200,000		9,600,000
Fair Value Of Real Estate	14,706,000			52,505,000
Operating Properties [Member] | Dispositions [Member]
Number of Real Estate Properties	2
Operating Properties [Member]
Sales of Real Estate	10,300,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	2,500,000
Acquisitions [Member] | Santee Trolley Square [Member]
Equity Method Investment, Ownership Percentage	45.00%
Acquisitions [Member] | Shops at Kildeer [Member]
Equity Method Investment, Ownership Percentage	19.00%
Acquisitions [Member] | Putty Hill Plaza [Member]
Noncontrolling Interest, Ownership Percentage by Parent	80.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	20.00%
Acquisitions [Member]
Number of Real Estate Properties	4
Impairment of Property Carrying Value [Member]
Number of Real Estate Properties	2
Impairment of Real Estate	2,800,000
Real Estate Investment Property, at Cost	17,500,000
Fair Value Of Real Estate	14,700,000
Santee Trolley Square [Member]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	22,700,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	48,456,000	[1]
Shops at Kildeer [Member]
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	32,724,000	[2]
Putty Hill Plaza [Member]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	500,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	9,115,000	[3]
Wilton River Park [Member] | Convertible Debt [Member]
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	5,200,000
Wilton River Park [Member]
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	36,000,000	[4]
Debt Instrument, Interest Rate, Stated Percentage	6.50%
Loans Receivable, Net	$ 5,200,000
Convertible Debt [Member]
Debt Instrument, Convertible, Term	1 year
Debt Instrument, Interest Rate, Stated Percentage	6.00%

[1] This property was acquired from a joint venture in which the Company had a 45% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as such recognized a gain of $22.7 million, before income tax, from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.

[2] This property was acquired from a joint venture in which the Company had a 19% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance. This transaction resulted in a change in control with no gain or loss recognized.

[3] The Company acquired the remaining 80% interest in an operating property from an unconsolidated joint venture in which the Company had a 20% noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as such recognized a gain of $0.5 million from the fair value adjustment associated with the Company's original ownership due to a change in control, which is reflected in the purchase price above in Other.

[4] The acquisition of this property included the issuance of $5.2 million of redeemable units, which are redeemable at the option of the holder after one year and earn a yield of 6% per annum, which is included in the purchase price above in Other. In connection with this transaction, the Company provided the sellers a $5.2 million loan at a rate of 6.5%, which is secured by the redeemable units.