Note 3 - Joint Venture Investments Accounted for under the Equity Method - Investment Details (Details) ft² in Millions, $ in Millions		Mar. 31, 2016 USD ($) ft²		Dec. 31, 2015 USD ($) ft²
Kim Pru and Kim Pru II [Member]
Average ownership interest	[1],[2]	15.00%		15.00%
Number of Real Estate Properties	[1],[2]	51		53
Total GLA | ft²	[1],[2]	9.2		9.6
Gross investment in real estate	[1],[2]	$ 2,492.8		$ 2,531.6
The company's investment	[1],[2]	$ 175.8		$ 175.5
Kimco Income Fund [Member]
Average ownership interest	[1]	48.60%		48.60%
Number of Real Estate Properties	[1]	47		47
Total GLA | ft²	[1]	10.8		10.8
Gross investment in real estate	[1]	$ 1,423.8		$ 1,422.8
The company's investment	[1]	$ 130.9		$ 131.0
CPP [Member]
Average ownership interest	[1],[3]	55.00%		55.00%
Number of Real Estate Properties	[1],[3]	7		7
Total GLA | ft²	[1],[3]	2.4		2.4
Gross investment in real estate	[1],[3]	$ 534.7		$ 524.1
The company's investment		$ 177.1	[1],[3]	$ 195.6
Other Institutional Programs [Member]
Number of Real Estate Properties	[1]	7		9
Total GLA | ft²	[1]	1.0		1.5
Gross investment in real estate	[1]	$ 301.5		$ 301.5
The company's investment	[1]	$ 5.6		$ 5.2
Other Joint Venture Programs [Member]
Number of Real Estate Properties		38		40
Total GLA | ft²		5.2		5.2
Gross investment in real estate		$ 776.2		$ 782.8
The company's investment		$ 68.2		$ 64.0
Canadian Properties [Member]
Number of Real Estate Properties		28		35
Total GLA | ft²		4.2		5.9
Gross investment in real estate		$ 502.1		$ 695.3
The company's investment		$ 145.0		$ 171.3
All Equity Method Investments [Member]
Number of Real Estate Properties		178		191
Total GLA | ft²		32.8		35.4
Gross investment in real estate		$ 6,031.1		$ 6,258.1
The company's investment		$ 702.6		$ 742.6

[1] 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.

[2] 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.

[3] In April 2016, the Company acquired its partner's interest in one operating property and one development project for a gross purchase price of $299.2 million, including the assumption of $100.0 million in mortgage debt, which encumbered the operating property.