Note 2 - Operating Property Activities (Details) - Acquisitions (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013 sqft
Business Acquisition [Line Items]
Purchase Price (Cash)	$ 118,561
Purchase Price (Debt Assumed)	239,362
Purchase Price (Other)	77,593
Purchase Price (Total)	435,516
GLA (in Square Feet)	2,287,000	[1]
Santee Trolley Square [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	26,863	[2]
Purchase Price (Debt Assumed)	48,456	[2]
Purchase Price (Other)	22,681	[2]
Purchase Price (Total)	98,000	[2]
GLA (in Square Feet)	311,000	[1],[2]
Shops at Kildeer [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)		[3]
Purchase Price (Debt Assumed)	32,724	[3]
Purchase Price (Other)		[3]
Purchase Price (Total)	32,724	[3]
GLA (in Square Feet)	168,000	[1],[3]
Village Commons S.C. [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	7,100
Purchase Price (Total)	7,100
GLA (in Square Feet)	125,000	[1]
Putty Hill Plaza [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	4,592	[4]
Purchase Price (Debt Assumed)	9,115	[4]
Purchase Price (Other)	489	[4]
Purchase Price (Total)	14,196	[4]
GLA (in Square Feet)	91,000	[1],[4]
Columbia Crossing II S.C. [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	21,800
Purchase Price (Total)	21,800
GLA (in Square Feet)	101,000	[1]
Roseville Plaza [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	5,143
Purchase Price (Total)	5,143
GLA (in Square Feet)	80,000	[1]
Wilton River Park [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	777	[5]
Purchase Price (Debt Assumed)	36,000	[5]
Purchase Price (Other)	5,223	[5]
Purchase Price (Total)	42,000	[5]
GLA (in Square Feet)	187,000	[1],[5]
Canyon Square [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	1,950	[6]
Purchase Price (Debt Assumed)	13,800	[6]
Purchase Price (Other)		[6]
Purchase Price (Total)	15,750	[6]
GLA (in Square Feet)	97,000	[1],[6]
JTS Portfolio [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)		[7]
Purchase Price (Debt Assumed)	43,267	[7]
Purchase Price (Other)	11,733	[7]
Purchase Price (Total)	55,000	[7]
GLA (in Square Feet)	520,000	[1],[7]
Factoria Mall [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	37,283	[8]
Purchase Price (Debt Assumed)	56,000	[8]
Purchase Price (Other)	37,467	[8]
Purchase Price (Total)	130,750	[8]
GLA (in Square Feet)	510,000	[1],[8]
6 Out-parcels [Member]
Business Acquisition [Line Items]
Purchase Price (Cash)	13,053
Purchase Price (Total)	$ 13,053
GLA (in Square Feet)	97,000	[1]

[1] Gross leasable area ("GLA")

[2] 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.

[3] 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.

[4] 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.

[5] 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.

[6] This property was acquired from a joint venture in which the Company has a 15% 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.

[7] The Company acquired the remaining interest in a portfolio of office properties from a preferred equity investment in which the Company held a noncontrolling interest. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as such recognized a change in control loss of $9.6 million from the fair value adjustment associated with the Company's original ownership, which is reflected in the purchase price above in Other. The debt assumed in connection with this transaction of $43.3 million was repaid in April 2013.

[8] The Company acquired an additional 49% interest in this operating property from an unconsolidated joint venture in which the Company had a 50% noncontrolling interest. As such the Company now consolidates this investment. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance and as a result, recognized a gain of $8.2 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.