Note 10 - Noncontrolling Interests - Redemption Value of the Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Balance		$ 15,784	$ 17,943
Fair value allocation to partnership interest (1)	[1]	2,068	0
Income		169	262
Distributions		(169)	(262)
Balance		$ 17,852	$ 17,943

[1] During January 2021, KIM RDC, LLC (“KIM RDC”), a wholly owned subsidiary of the Company, and KP Lancewood LLC (“KPR Member”) entered into a joint venture agreement wherein KIM RDC has a 100% controlling interest and KPR Member is entitled to a profit participation. The joint venture acquired two operating properties for a gross fair value of $104.0 million (see Footnote 3 to the Notes to the Company’s Condensed Consolidated Financial Statements). This joint venture is accounted for as a consolidated VIE (see Footnote 11 to the Notes to the Company’s Condensed Consolidated Financial Statements).