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Note 28 - Subsequent Events (Details Textual) $ / shares in Units, ft² in Thousands, $ in Thousands |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 01, 2024 USD ($) | Jan. 02, 2024 USD ($) ft² $ / shares shares | Feb. 28, 2024 USD ($) shares | Jan. 31, 2024 USD ($) shares | Dec. 31, 2023 USD ($) ft² $ / shares shares | Dec. 31, 2022 USD ($) ft² $ / shares shares | Dec. 31, 2021 USD ($)
Gross Leasable Area (Square Foot) | ft² |  |  |  |  | 1,145 | 934 |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  |  | $ 1 | $ 1 |
Preferred Stock, Liquidation Preference, Value |  |  |  |  | $ 484,179 | $ 485,868 |
Business Combination, Acquisition Related Costs |  |  |  |  | 4,766 | (0) | $ 50,191
Proceeds from Sale and Maturity of Marketable Securities |  |  |  |  | $ 292,552 | $ 302,504 | $ 377
Share Repurchase Program [Member] |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  |  | $ 1 |  |
Class L Cumulative Redeemable Preferred Stock Depositary Shares[Member] | Maximum [Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  |  | 894,000 |  |
Class M Cumulative Redeemable Preferred Stock Depositary Shares [Member] | Maximum [Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  |  | 1,048,000 |  |
Albertsons Companies, Inc [Member] |  |  |  |  |  |  |
Sale of Marketable Securities (in shares) | shares |  |  |  |  | 14,100,000 | 11,500,000 |
Proceeds from Sale and Maturity of Marketable Securities |  |  |  |  | $ 282,300 | $ 301,100 |
Equity Securities, FV-NI, Realized Gain (Loss) |  |  |  |  | 241,200 | 251,500 |
Equity Securities, Taxes Paid on Capital Gains |  |  |  |  | 60,900 | $ 57,200 |
RPT [Member] |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  | $ 4,800 |  |
Subsequent Event [Member] |  |  |  |  |  |  |
Number of Real Estate Properties |  | 523 |  |  |  |  |
Subsequent Event [Member] | Unsecured Term Loan Credit Facility [Member] |  |  |  |  |  |  |
Debt Instrument, Face Amount |  | $ 200,000 |  |  |  |  |
Subsequent Event [Member] | Unsecured Term Loan Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.85% |  |  |  |  |
Subsequent Event [Member] | Unsecured Term Loan Credit Facility [Member] | Base Rate [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.00% |  |  |  |  |
Subsequent Event [Member] | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Repayments of Long-Term Debt |  |  |  | $ 246,200 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 4.45% |  |  |
Subsequent Event [Member] | Kimco OP [Member] |  |  |  |  |  |  |
Subsidiary, Ownership Percentage, Parent |  | 99.86% |  |  |  |  |
Subsequent Event [Member] | Class N Cumulative Convertible Preferred Stock Depositary Shares [Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  | 185,000 |  |  |
Subsequent Event [Member] | Class N Cumulative Convertible Preferred Stock Depositary Shares [Member] | Maximum [Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  | 185,000 |  |  |
Subsequent Event [Member] | Class L Cumulative Redeemable Preferred Stock Depositary Shares[Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  | 891,000 |  |  |
Subsequent Event [Member] | Class L Cumulative Redeemable Preferred Stock Depositary Shares[Member] | Maximum [Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  | 891,000 |  |  |
Subsequent Event [Member] | Class M Cumulative Redeemable Preferred Stock Depositary Shares [Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  | 1,047,000 |  |  |
Subsequent Event [Member] | Class M Cumulative Redeemable Preferred Stock Depositary Shares [Member] | Maximum [Member] | Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares |  |  |  | 1,047,000 |  |  |
Subsequent Event [Member] | Albertsons Companies, Inc [Member] |  |  |  |  |  |  |
Sale of Marketable Securities (in shares) | shares |  |  | 14,200,000 |  |  |  |
Proceeds from Sale and Maturity of Marketable Securities |  |  | $ 299,100 |  |  |  |
Equity Securities, FV-NI, Realized Gain (Loss) | $ 288,700 |  |  |  |  |  |
Equity Securities, Taxes Paid on Capital Gains | $ 72,900 |  |  |  |  |  |
Subsequent Event [Member] | RPT [Member] |  |  |  |  |  |  |
Number of Properties Acquired |  | 56 |  |  |  |  |
Gross Leasable Area (Square Foot) | ft² |  | 13,300 |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Per Each Acquired Company Share (in shares) | shares |  | 0.6049 |  |  |  |  |
Business Combination, Acquisition Related Costs |  | $ 18,900 |  |  |  |  |
Payments to Acquire Businesses, Fractional Shares |  | 100 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Senior Notes [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt |  | $ 511,500 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Senior Notes [Member] | Minimum [Member] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.64% |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Senior Notes [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.74% |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Unsecured Debt [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt |  | $ 310,000 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Unsecured Debt [Member] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.905% |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Unsecured Debt [Member] | Minimum [Member] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.674% |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Unsecured Debt [Member] | Maximum [Member] |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.875% |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Unsecured Term Loan Maturing 2026 [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt |  | $ 50,000 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Unsecured term Loan Maturing 2027 [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt |  | 100,000 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Second Unsecured Term Loan Maturing 2027 [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt |  | 50,000 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Unsecured Term Loan Maturing 2028 [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-Term Debt |  | 110,000 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Line of Credit [Member] |  |  |  |  |  |  |
Repayments of Long-Term Debt |  | $ 130,000 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Series D Cumulative Convertible Perpetual Preferred Shares [Member] |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage |  | 7.25% |  |  |  |  |
Business Combination, Preferred Share Right to be Converted to Depository Share (in shares) | shares |  | 0.001 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Class N Preferred Stock [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions (in shares) | shares |  | 1,849 |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  | $ 1 |  |  |  |  |
Preferred Stock, Liquidation Preference, Value |  | $ 92,400 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Class N Cumulative Convertible Preferred Stock Depositary Shares [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions (in shares) | shares |  | 1,848,539 |  |  |  |  |
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares |  | $ 50 |  |  |  |  |
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares |  | $ 3.625 |  |  |  |  |
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | shares |  | 2.3071 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Property Net Lease Joint Venture [Member] |  |  |  |  |  |  |
Number of Properties Acquired |  | 49 |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 6.00% |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Wholly Owned Properties [Member] |  |  |  |  |  |  |
Number of Properties Acquired |  | 43 |  |  |  |  |
Subsequent Event [Member] | RPT [Member] | Consolidated Properties [Member] |  |  |  |  |  |  |
Number of Properties Acquired |  | 13 |  |  |  |  |

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