Note 4 - Investments and Advances in Real Estate Joint Ventures (Detail) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Number of Agreements	1
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 220,963,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	23,170,000		2,008,000
Impairment of Real Estate	3,200,000		9,600,000
KimPru and KimPru II [Member]
Number of Joint Ventures	4
Number of Accounts	4
Number of Real Estate Properties	61	[1],[2]			61	[1],[2]
KimPru [Member] | Company's Share Of Impairment [Member]
Impairment of Real Estate				500,000
KimPru [Member]
Number of Joint Ventures	3
Impairment of Real Estate	3,700,000
Other Joint Venture Programs [Member] | Sold [Member] | Additional [Member]
Number of Real Estate Properties	2
Other Joint Venture Programs [Member] | Sold [Member]
Business Acquisition, Cost of Acquired Entity, Purchase Price	75,500,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain			2,000,000
Number of Real Estate Properties			3
Other Income			2,600,000
Other Joint Venture Programs [Member] | Sold [Member]
Number of Joint Ventures			3
Other Joint Venture Programs [Member] | Pending Sale [Member]
Number of Real Estate Properties				1
Other Joint Venture Programs [Member] | Company's Share Of Impairment [Member]
Impairment of Real Estate	900,000
Other Joint Venture Programs [Member]
Sales of Real Estate	98,000,000		180,000,000
Gains (Losses) on Sales of Investment Real Estate	22,700,000		8,300,000
Number of Real Estate Properties	86	[3],[4]			87	[3],[4]
Impairment of Real Estate				1,800,000
Kimco Income Fund [Member]
Business Acquisition, Percentage of Voting Interests Acquired	14.49%
Business Acquisition, Cost of Acquired Entity, Purchase Price	19,900,000
Number of Real Estate Properties	12	[2],[5]			12	[2],[5]
UBS Programs [Member] | Operating Properties [Member]
Business Acquisition, Cost of Acquired Entity, Purchase Price	32,700,000
UBS Programs [Member]
Number of Real Estate Properties	39	[2],[6],[7]			40	[2],[6],[7]
Other Institutional Programs [Member] | Operating Properties [Member]
Business Acquisition, Cost of Acquired Entity, Purchase Price	14,200,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain	500,000
Other Institutional Programs [Member]
Number of Real Estate Properties	57	[2],[8]			58	[2],[8]
BIG Shopping Centers [Member] | Company's Share [Member]
Gains (Losses) on Extinguishment of Debt	2,400,000
BIG Shopping Centers [Member]
Gains (Losses) on Extinguishment of Debt	13,700,000
Number of Real Estate Properties	21	[2],[6]			22	[2],[6]
Latin America [Member] | Operating Properties [Member] | Losses [Member]
Number of Real Estate Properties	3
Latin America [Member] | Operating Properties [Member]
Number of Real Estate Properties	9
Latin America [Member] | Additional [Member] | Company's Share [Member]
Gains (Losses) on Sales of Investment Real Estate	(2,300,000)
Latin America [Member] | Additional [Member]
Gains (Losses) on Sales of Investment Real Estate	(4,600,000)
Latin America [Member] | Company's Share [Member]
Gains (Losses) on Sales of Investment Real Estate	26,600,000
Latin America [Member]
Gains (Losses) on Sales of Investment Real Estate	53,200,000
Number of Real Estate Properties	131				131
Operating Properties [Member] | Sold [Member]
Number of Real Estate Properties	1
Operating Properties [Member]
Sales of Real Estate	$ 10,300,000

[1] This venture represents four separate joint ventures, with four separate accounts managed by Prudential Real Estate Investors ("PREI"), three of these ventures are collectively referred to as KimPru and the remaining venture is referred to as KimPru II.

[2] The Company manages these joint venture investments and, where applicable, earns acquisition fees, leasing commissions, property management fees, asset management fees and construction management fees.

[3] During the three months ended March 31, 2013, a joint venture in which the Company held a noncontrolling interest sold an operating property to the Company for a sales price of $98.0 million. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance. As such, the Company recognized a gain of $22.7 million, before income tax, from the fair value adjustment associated with its original ownership due to a change in control and now consolidates this operating property.

[4] During the three months ended March 31, 2013, the Company amended one of its Canadian preferred equity investment agreements to restructure the investment as a pari passu joint venture in which the Company holds a noncontrolling interest. As a result of this transaction, the Company continues to account for its investment in this joint venture under the equity method of accounting and includes this investment in Investments and advances to real estate joint ventures within the Company's Condensed Consolidated Balance Sheets.

[5] During the three months ended March 31, 2013, the Company purchased an additional 14.49% interest in Kimco Income Fund for $19.9 million.

[6] Ownership % is a blended rate

[7] During the three months ended March 31, 2013, UBS sold an operating property to the Company for a sales price of $32.7 million, which was equal to the remaining debt balance. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance. As such the Company recognized no gain or loss from the fair value adjustment associated with it's the Company's original ownership due to a change in control and now consolidates this operating property.

[8] During the three months ended March 31, 2013, a joint venture in which the Company held a noncontrolling interest sold an operating property to the Company for a sales price of $14.2 million. The Company evaluated this transaction pursuant to the FASB's Consolidation guidance. As such the Company 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 and now consolidates this operating property.