Note 21 - Earnings Per Share/Units - Reconciliation of Earnings (Loss) and the Weighted Average Number of Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Net (loss)/income available to the Company's common shareholders		$ (18,916)	$ 283,512
Earnings attributable to participating securities		(680)	(1,766)
Net (loss)/income available to the Company’s common shareholders for basic earnings per share		(19,596)	281,746
Distributions on convertible units		0	1,118
Net (loss)/income available to the Company’s common shareholders for diluted earnings per share		$ (19,596)	$ 282,864
Weighted average common shares outstanding – basic (in shares)		670,118	616,489
Equity awards (in shares)	[1]	0	584
Assumed conversion of convertible units (in shares)	[1]	0	2,555
Weighted average common shares outstanding – diluted (in shares)	[1]	670,118	619,628
Basic earnings per share (in dollars per share)		$ (0.03)	$ 0.46
Diluted earnings per share (in dollars per share)		(0.03)	0.46
-Basic (in dollars per share)		(0.03)	0.46
-Diluted (in dollars per share)		$ (0.03)	$ 0.46
Kimco Realty OP, LLC [Member]
Net (loss)/income available to the Company's common shareholders		$ (18,931)	$ 283,512
Earnings attributable to participating securities		(680)	(1,766)
Net (loss)/income available to the Company’s common shareholders for basic earnings per share		(19,611)	281,746
Distributions on convertible units		0	1,118
Net (loss)/income available to the Company’s common shareholders for diluted earnings per share		$ (19,611)	$ 282,864
Weighted average common shares outstanding – basic (in shares)		673,954	616,489
Equity awards (in shares)		0	584
Assumed conversion of convertible units (in shares)	[1]	0	2,555
Weighted average common shares outstanding – diluted (in shares)		673,954	619,628
Basic earnings per share (in dollars per share)		$ (0.03)	$ 0.46
Diluted earnings per share (in dollars per share)		(0.03)	0.46
-Basic (in dollars per share)		(0.03)	0.46
-Diluted (in dollars per share)		$ (0.03)	$ 0.46

[1] The effect of the assumed conversion of certain convertible units had an anti-dilutive effect upon the calculation of Net income available to the Company’s common shareholders per share. Accordingly, the impact of such conversions has not been included in the determination of diluted earnings per share calculations.