Note 2 - Weingarten Merger - Information Regarding Consideration Transferred, Purchase Price Allocation, and Asset Lives (Details) - USD ($) $ / shares in Units, $ in Thousands			5 Months Ended	12 Months Ended
		Aug. 03, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Right-of-use intangible assets (Year)				24 years 4 months 24 days
Leases, Acquired-in-Place [Member]
Intangible			$ 48,648	$ 28,405	$ 48,648
Intangible assets, weighted average amortization period (Year)				6 years 10 months 24 days	9 years 1 month 6 days
Above Market Leases [Member]
Intangible			6,581	$ 8,408	$ 6,581
Intangible assets, weighted average amortization period (Year)				8 years 3 months 18 days	6 years 6 months
Tenant Improvements [Member]
Intangible			16,391	$ 11,689	$ 16,391
Intangible assets, weighted average amortization period (Year)				7 years 10 months 24 days	8 years 6 months
Building [Member]
Weighted-average amortization period, Property Plant and Equipment (Year)				50 years	50 years
Building Improvements [Member]
Weighted-average amortization period, Property Plant and Equipment (Year)				45 years	45 years
Below-market Leases [Member]
Intangible			39,712	$ 24,069	$ 39,712
Intangible assets, weighted average amortization period (Year)				16 years 1 month 6 days	38 years 10 months 24 days
Weingarten Realty Investors [Member]
Price of Kimco Common Stock (in dollars per share)		$ 20.78
Kimco common stock issued (in shares)		179,919,880
Calculated Value of WRI Consideration		$ 3,738,735
Cash Consideration	[1]	320,424
Total Value of Consideration		4,059,159
Land		1,174,407
Building and improvements		4,040,244
Real estate assets		5,627,469
Investments in and advances to real estate joint ventures		585,382	585,382	$ 0	$ 585,382	$ 0
Cash, accounts receivable and other assets		241,582
Total assets acquired		6,454,433
Notes payable		(1,497,632)	(1,497,632)	0	(1,497,632)	0
Mortgages payable		(317,671)	(317,671)	0	(317,671)	0
Accounts payable and other liabilities		(283,559)
Below-market leases		(119,373)	(119,373)	0	(119,373)	0
Noncontrolling interests		(177,039)	$ (177,039)	$ 0	$ (177,039)	$ 0
Total liabilities assumed		(2,395,274)
Total purchase price		4,059,159
Right-of-use intangible assets (Year)			30 years 10 months 24 days		30 years 10 months 24 days
Fair market value of debt adjustment (Year)			3 years 8 months 12 days
Weingarten Realty Investors [Member] | Leases, Acquired-in-Place [Member]
Intangible		370,685
Intangible assets, weighted average amortization period (Year)			5 years 7 months 6 days
Weingarten Realty Investors [Member] | Above Market Leases [Member]
Intangible		$ 42,133
Intangible assets, weighted average amortization period (Year)			10 years 1 month 6 days
Weingarten Realty Investors [Member] | Tenant Improvements [Member]
Weighted-average amortization period, Property Plant and Equipment (Year)			7 years 1 month 6 days
Weingarten Realty Investors [Member] | Building [Member]
Weighted-average amortization period, Property Plant and Equipment (Year)			50 years
Weingarten Realty Investors [Member] | Building Improvements [Member]
Weighted-average amortization period, Property Plant and Equipment (Year)			45 years
Weingarten Realty Investors [Member] | Fixtures and Leasehold Improvements [Member]
Weighted-average amortization period, Property Plant and Equipment (Year)			6 years 2 months 12 days
Weingarten Realty Investors [Member] | Below-market Leases [Member]
Weighted-average amortization period, Property Plant and Equipment (Year)			31 years 6 months

[1] Amounts include additional consideration of $39.3 million relating to reimbursements paid by the Company to Weingarten at the closing of the Merger for transaction costs incurred by Weingarten.