Note 7 - Investment In and Advances to Real Estate Joint Ventures (Details Textual) ft² in Thousands, $ in Thousands		2 Months Ended	12 Months Ended
		Dec. 31, 2021 USD ($) ft²	Dec. 31, 2022 USD ($) ft²	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2019	Aug. 03, 2021 USD ($) ft²	Dec. 31, 2020 USD ($)
Gross Leasable Area (Square Foot) | ft²	[1]	3,256	934	3,256
Disposal Group, Including Discontinued Operation, Consideration	[2]	$ 612,400	$ 191,100	$ 612,400			$ 31,800
Other Liabilities, Total		510,382	601,574	510,382
Equity Method Investments		$ 1,000,000	1,100,000	$ 1,000,000
Weingarten Realty Investors [Member]
Secured Debt Assumed by Joint Ventures in Business Combination, Including Fair Market Value Adjustment						$ 191,500
Secured Debt Assumed by Joint Ventures in Business Combination, Fair Market Value Adjustment						800
Prudential Investment Program [Member]
Tangible Asset Impairment Charges, Total			$ 15,100
Jamestown [Member]
Joint Venture, Number of Property Interests		6		6
Disposal Group, Including Discontinued Operation, Consideration		$ 425,800		$ 425,800
Number of Real Estate Properties, Interest Disposed of or Transferred		6
All Equity Method Investments [Member]
Number of Real Estate Properties		120	111	120
Gross Leasable Area (Square Foot) | ft²		24,700	22,400	24,700
Kimco Income Fund [Member]
Payments to Acquire Interest in Subsidiaries and Affiliates, Total			$ 55,100
Equity Method Investment, Ownership Percentage	[3]		52.10%
Kimco Income Fund [Member] | Board of Directors Chairman [Member]
Payments to Acquire Interest in Subsidiaries and Affiliates, Total			$ 100
Prudential Investment Program [Member]
Tangible Asset Impairment Charges, Total			$ 2,300
Real Estate Joint Ventures [Member] | Operating Properties [Member]
Number of Land Parcels Sold			2	1
Equity Method Investment, Sales Price		$ 88,900	$ 349,100	$ 88,900
Equity Method Investment, Realized Gain (Loss) on Disposal			$ 39,300	$ 9,900
Number of Real Estate Properties, Interest Disposed of or Transferred				4	9
Number of Real Estate Properties, Remaining Interest Acquired			9	9
Real Estate Investments, Net, Total		780,100		$ 780,100		$ 586,200
Gain (Loss) on Change of Control of Equity Investments				5,000
Unconsolidated Joint Ventures Acquired in Weingarten Merger [Member]
Number of Real Estate Properties						30
Gross Leasable Area (Square Foot) | ft²						4,400
KIR [Member]
Equity Method Investment, Ownership Percentage			52.10%
Other Joint Venture Programs [Member]
Other Liabilities, Total		$ 4,800	$ 5,300	$ 4,800

[1] Gross leasable area ("GLA")

[2] During 2021, the Company purchased its partner’s 70.0% remaining interest in Jamestown Portfolio, which is comprised of six property interests. The Company then entered into a joint venture with Blackstone Real Estate Income Trust, Inc. ("BREIT") in which it contributed these six properties for a gross sales price of $425.8 million, including $170.0 million of non-recourse mortgage debt. As a result, the Company no longer consolidates these six property interests and recognized a loss on change in control of interests of $0.4 million. The Company has a 50.0% investment in this joint venture ($130.1 million as of the date of deconsolidation), included in Investments in and advances to real estate joint ventures on the Company’s Consolidated Balance Sheets.

[3] During 2022, the Company purchased additional ownership interests for $55.1 million, including the General Partner's ownership interest from Milton Cooper, Executive Chairman of the Board of Directors of the Company, for $0.1 million. There was no change in control as a result of these transactions.