DERIVATIVE INSTRUMENTS, HEDGING ACTIVITIES AND OTHER COMPREHENSIVE INCOME - Summary of Terms and Fair Value of Derivative Financial Instruments (Details) $ in Thousands	3 Months Ended
Mar. 31, 2024 USD ($) instrument	Dec. 31, 2023 USD ($)
Interest Rate Swap \| Cash Flow
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregate notional	$ 820,000
Fair value assets (liabilities)	$ 25,275	$ 23,063
$250M Interest Rate Swap Maturing in 2025 \| Cash Flow
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of instruments \| instrument	4
Aggregate notional	$ 250,000
Fair value assets (liabilities)	$ 6,287	4,952
$250M Interest Rate Swap Maturing in 2025 \| Cash Flow \| SOFR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate (as a percent)	2.99%
$100M Interest Rate Swap Maturing in 2025 \| Cash Flow
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of instruments \| instrument	2
Aggregate notional	$ 100,000
Fair value assets (liabilities)	$ 2,707	2,415
$100M Interest Rate Swap Maturing in 2025 \| Cash Flow \| SOFR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate (as a percent)	2.66%
$200M Interest Rate Swap Maturing in 2025 \| Cash Flow
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of instruments \| instrument	2
Aggregate notional	$ 200,000
Fair value assets (liabilities)	$ 6,165	5,716
$200M Interest Rate Swap Maturing in 2025 \| Cash Flow \| SOFR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate (as a percent)	2.37%
$120M Interest Rate Swap Maturing in 2024 \| Cash Flow
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of instruments \| instrument	3
Aggregate notional	$ 120,000
Fair value assets (liabilities)	$ 1,301	2,236
$120M Interest Rate Swap Maturing in 2024 \| Cash Flow \| SOFR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate (as a percent)	1.58%
$150M Interest Rate Swap Maturing in 2026 \| Cash Flow
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of instruments \| instrument	3
Aggregate notional	$ 150,000
Fair value assets (liabilities)	$ 8,815	7,744
$150M Interest Rate Swap Maturing in 2026 \| Cash Flow \| SOFR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate (as a percent)	1.68%
$155M Interest Rate Swap Maturing in 2025 \| Fair Value
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of instruments \| instrument	2
Aggregate notional	$ 155,000
Fair value assets (liabilities)	$ (9,207)	(9,408)
Fixed interest rate (as a percent)	4.52%
$155M Interest Rate Swap Maturing in 2025 \| Fair Value \| SOFR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Credit spread (as a percent)	3.70%
Blending floating interest rate (as a percent)	3.70%
$150M Forward-Starting Interest Rate Swap Maturing in 2034 \| Cash Flow
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Number of instruments \| instrument	3
Aggregate notional	$ 150,000
Fair value assets (liabilities)	$ 0	$ (700)
$150M Forward-Starting Interest Rate Swap Maturing in 2034 \| Cash Flow \| SOFR
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Interest rate (as a percent)	3.44%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482900/835-30-50-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482925/835-30-45-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-6

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-SubTopic 10
-Topic 815
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480463/815-10-45-5

+ Details

Name:	us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeBasisSpreadOnVariableRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480524/946-210-50-6

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 55
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480493/946-210-55-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-5

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13(Column C))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-5

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5A
-Subparagraph (SX 210.12-13A(Column B))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-5A

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1B

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-1A

+ Details

Name:	us-gaap_DerivativeNumberOfInstrumentsHeld
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=krg_A250MInterestRateSwapMaturingIn2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=krg_SecuredOvernightFinancingRateSOFRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=krg_A100MInterestRateSwapMaturingIn2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=krg_A200MInterestRateSwapMaturingIn2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=krg_A120MInterestRateSwapMaturingIn2024Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=krg_A150MInterestRateSwapMaturingIn2026Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=krg_A155MInterestRateSwapMaturingIn2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_FairValueHedgingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=krg_A150MForwardStartingInterestRateSwapMaturingIn2034Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: