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Note 2 - Real Estate (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Off-Market Lease, Unfavorable | $ 330,600,000 | $ 330,900,000 |
Amortization of above and below Market Leases | (17,253,000) | (13,591,000) | $ (14,843,000)
In-place Leases, Tenant Relationships and Above-market Leases [Member] |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization | 751,215 | 671,794 |
Below Market Rents [Member] |  |  |
Finite-Lived Intangible Assets, Accumulated Amortization | 260,800,000 | 242,400,000 |
Above and Below Market Leases [Member] |  |  |
Amortization of above and below Market Leases | 17,300,000 | 13,600,000 | 14,800,000
In-place Leases and Tenant Relationships [Member] |  |  |
Amortization of above and below Market Leases | $ 94,700,000 | $ 118,100,000 | $ 80,100,000

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- Definition Amount of non-cash amortization of intangible asset (liability) for above and below market leases. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition This element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Details
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