Note 16 - Noncontrolling Interests and Redeemable Noncontrolling Interests (Details Textual) $ / shares in Units, $ in Thousands			1 Months Ended		12 Months Ended
		Aug. 03, 2021 USD ($) shares	Jun. 30, 2021 USD ($)	Jan. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2007 USD ($) shares	Dec. 31, 2006 USD ($) $ / shares shares
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					$ 891		$ 149
Redeemable Noncontrolling Interest, Equity, Carrying Amount, Total					92,933	$ 13,480	15,784
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests					209	(0)
Proceeds from Sale of Property Held-for-sale					184,294	302,841	30,545
Asset Impairment Charges, Total					21,958	3,597	$ 6,624
Asset Acquisition, Consideration Transferred, Total					$ 524,892	$ 896,707
Number of Properties Sold	[1]				9	13	3
Disposal Group, Including Discontinued Operation, Consideration	[1]				$ 191,100	$ 612,400	$ 31,800
Measurement Input, Cap Rate [Member]
Noncontrolling Interest, Fair Value, Measurement Input						0.0550
Measurement Input, Discount Rate [Member]
Noncontrolling Interest, Fair Value, Measurement Input						0.0650
KIM RDC, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member] | Operating Properties [Member]
Asset Acquisition, Consideration Transferred, Total				$ 104,000
Disposal of Two Operating Properties [Member] | Discontinued Operations, Disposed of by Sale [Member] | KIM RDC, LLC [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Number of Properties Sold			2
Disposal Group, Including Discontinued Operation, Consideration			$ 108,000
Disposal of Two Operating Properties [Member] | Discontinued Operations, Disposed of by Sale [Member] | KPR [Member]
Distribution Made to Limited Partner, Cash Distributions Paid			$ 2,100
Properties Held in Consolidated Joint Venture [Member]
Number of Properties Held in Consolidated Joint Venture					5
Asset Impairment Charges, Total					$ 19,000
Noncontrolling Interest, Impairment Shares Amount					15,800
Properties Held in Consolidated Joint Venture [Member] | Disposal Of Five Operating Properties [Member] | Discontinued Operations, Disposed of by Sale [Member]
Disposal Group, Including Discontinued Operation, Financing Liabilities					42,800
Proceeds from Sale of Property Held-for-sale					105,500
Noncontrolling Interests, Amount Received from Disposal of Properties					$ 50,300
Consolidated Joint Ventures Structured as DownREIT Partnerships [Member]
Non-controlling Interest, Units Redeemed (in shares) | shares					73,286	73,466
Non-controlling Interest, Cumulative Par Value					$ 1,700	$ 1,700
Stock Issued During Period, Shares, Redemption/ Conversion of Noncontrolling Interests (in shares) | shares					73,286	73,466
Consolidated Joint Venture [Member]
Noncontrolling Interest, Ownership Percentage by Parent					15.00%
Joint Venture with KP Lancewood [Member] | KIM RDC, LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent				100.00%
Weingarten Realty Investors [Member] | Consolidated Joint Ventures Structured as DownREIT Partnerships [Member]
Redeemable Units to Company Common Stock, Ratio		1
Number of Operating Properties Acquired		2
Redeemable Noncontrolling Interest, Equity, Fair Value, Total		$ 41,700
Weingarten Realty Investors [Member] | Raleigh Limited Partnership [Member]
Non-controlling Interest, Units (in shares) | shares		1,813,615
Weingarten Realty Investors [Member] | Madison Village Limited Partnership [Member]
Non-controlling Interest, Units (in shares) | shares		174,411
Weingarten Realty Investors [Member] | Consolidated Joint Ventures Other than DownREIT Partnerships [Member]
Number of Operating Properties Acquired		8
Redeemable Noncontrolling Interest, Equity, Fair Value, Total					$ 38,600	$ 40,100
Noncontrolling Interest in Joint Ventures		$ 132,300
Convertible Units [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance											$ 5,300
Non-controlling Interest, Units (in shares) | shares											138,015
Convertible Units [Member] | Fair Market Value Adjustments [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance											$ 300
Capital Units, Class B [Member]
Redeemable Noncontrolling Interest, Equity, Carrying Amount, Total					16,100	16,100
Non-controlling Interest, Units Issued (in shares) | shares											647,758
Non-controlling Interest, Par Value (in dollars per share) | $ / shares											$ 37.24
Redeemable Units to Company Common Stock, Ratio											1
Non-controlling Interest, Units Redeemed (in shares) | shares								188,951	25,970	30,000
Non-controlling Interest, Cumulative Par Value								$ 8,000	$ 1,100	$ 1,100
Cash Paid to Noncontrolling Interests to Settle Capital Units								$ 4,000	$ 500
Noncontrolling Interest [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					891		149
Noncontrolling Interest [Member] | Consolidated Joint Ventures Structured as DownREIT Partnerships [Member]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests					1,500	1,500
Additional Paid-in Capital [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					0		$ 0
Additional Paid-in Capital [Member] | Consolidated Joint Ventures Structured as DownREIT Partnerships [Member]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests					$ 1,500	1,500
PUERTO RICO
Number of Real Estate Properties					7
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					$ 233,000
Redeemable Noncontrolling Interest, Equity, Carrying Amount, Total					4,700	$ 5,200
PUERTO RICO | Fair Market Value Adjustments [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					15,100
PUERTO RICO | Non-convertible Units [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					158,600
PUERTO RICO | Convertible Units [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					45,800
PUERTO RICO | Premiums [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					$ 13,500
Long Island, NY [Member]
Number of Real Estate Properties					8
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					$ 135,700
Embedded Derivative, Fair Value of Embedded Derivative Liability					56,000
Long Island, NY [Member] | Noncontrolling Interest [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					79,700
Long Island, NY [Member] | Preferred Units [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					122,100
Long Island, NY [Member] | Common Units [Member]
Noncontrolling Interest, Increase from Subsidiary Equity Issuance					$ 13,600

[1] 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.