Note 3 - Property Acquisitions, Developments and Other Investments (Details) - Acquisition of Operating Properties (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	$ 367,752		$ 455,280
Purchase Price - Debt Assumed	279,123		179,198
Purchase Price- Other	77,593
Purchase Price - Total	724,468		634,478
GLA	4,057	[1]	3,086	[1]
Santee Trolley Square [Member]
Significant Acquisitions and Disposals [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	311	[1],[2]
Shops at Kildeer [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash		[3]
Purchase Price - Debt Assumed	32,724	[3]
Purchase Price- Other		[3]
Purchase Price - Total	32,724	[3]
GLA	168	[1],[3]
Village Commons S.C. [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	7,100
Purchase Price - Total	7,100
GLA	125	[1]
Putty Hill Plaza [Member]
Significant Acquisitions and Disposals [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	91	[1],[4]
Columbia Crossing II S.C. [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	21,800
Purchase Price - Total	21,800
GLA	101	[1]
Roseville Plaza [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	5,143
Purchase Price - Total	5,143
GLA	80	[1]
Wilton River Park Shopping Ctr [Member]
Significant Acquisitions and Disposals [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	187	[1],[5]
Canyon Square Plaza [Member]
Significant Acquisitions and Disposals [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	97	[1],[6]
JTS Properties [Member]
Significant Acquisitions and Disposals [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	520	[1],[7]
Factoria Mall [Member]
Significant Acquisitions and Disposals [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	510	[1],[8]
Outparcel [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	13,053
Purchase Price - Total	13,053
GLA	97	[1]
Highlands Ranch [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	14,600
Purchase Price - Total	14,600
GLA	44	[1]
Elmsford [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	23,000
Purchase Price - Total	23,000
GLA	143	[1]
Northridge Shopping Center [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	8,239
Purchase Price - Debt Assumed	11,511
Purchase Price - Total	19,750
GLA	146	[1]
Five Forks Crossing [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	9,825
Purchase Price - Total	9,825
GLA	74	[1]
Greenwood [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	4,067
Purchase Price - Total	4,067
GLA	30	[1]
Clark Portfolio [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	35,553
Purchase Price - Total	35,553
GLA	189	[1]
Winn Dixie Portfolio 6 Properties [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	43,506
Purchase Price - Total	43,506
GLA	392	[1]
Tomball SC [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	35,327
Purchase Price - Total	35,327
GLA	149	[1]
Atascocita SC [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	38,250
Purchase Price - Debt Assumed	28,250
Purchase Price - Total	66,500
GLA	317	[1]
Lawrenceville Market [Member]
Significant Acquisitions and Disposals [Line Items]
Purchase Price - Cash	36,824
Purchase Price - Total	$ 36,824
GLA	286	[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 and the properties within the portfolio were later sold during October and November 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.