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MORTGAGE AND OTHER INDEBTEDNESS - Schedule of Amortization of Debt Discounts and Premiums (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
Debt Disclosure [Abstract] |  |
Amortization of debt discounts, premiums and hedge instruments | $ 5,623 | $ 10,581

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- Definition Amortization of Debt Discounts, Premiums and Hedge Instruments + References No definition available. + Details
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Namespace Prefix: | krg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration