Debt Instrument, Maturity Date, Extension

No definition available.

Name:	krg_DebtInstrumentMaturityDateExtension
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Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Maturity Date, Number Of Extensions

+ References

No definition available.

+ Details

Name:	krg_DebtInstrumentMaturityDateNumberOfExtensions
Namespace Prefix:	krg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Letters of Credit Outstanding, Amount Advanced

+ References

No definition available.

+ Details

Name:	krg_LettersofCreditOutstandingAmountAdvanced
Namespace Prefix:	krg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Option to Increase Maximum Borrowing Capacity

+ References

No definition available.

+ Details

Name:	krg_LineofCreditFacilityOptiontoIncreaseMaximumBorrowingCapacity
Namespace Prefix:	krg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of Fixed-Rate Secured Loans, Retired

+ References

No definition available.

+ Details

Name:	krg_NumberofFixedRateSecuredLoansRetired
Namespace Prefix:	krg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Value in Unencumbered Asset Pool

+ References

No definition available.

+ Details

Name:	krg_ValueinUnencumberedAssetPool
Namespace Prefix:	krg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization expense attributable to debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

Name:	us-gaap_AmortizationOfFinancingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num: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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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-Topic 944
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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
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+ Details

Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

+ Details

Name:	us-gaap_LongTermDebtPercentageBearingFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cash received from principal payments made on loans related to operating activities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3536-108585

+ Details

Name:	us-gaap_ProceedsFromLoans
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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-Paragraph 15
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+ Details

Name:	us-gaap_RepaymentsOfLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

+ Details

Name:	us-gaap_RepaymentsOfSecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=krg_ScheduledPrincipalPaymentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=krg_ThreeFixedRateSecuredLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=krg_VariableRateDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=krg_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=krg_UnsecuredTermLoansMaturingJuly2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=krg_SeniorUnsecuredNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=krg_FixedRateDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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Balance Type:
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Mortgage and Other Indebtedness - Additional Information (Details)			9 Months Ended
	Sep. 30, 2019 USD ($)	Oct. 25, 2018 USD ($) extension	Sep. 30, 2019 USD ($) extension	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Apr. 24, 2018 USD ($)
Debt Instrument [Line Items]
Amortization of debt issuance costs			$ 2,128,000	$ 2,220,000
Long-term debt	$ 1,198,584,000		1,198,584,000		$ 1,543,301,000
Letters of credit outstanding, amount	2,000,000.0		2,000,000.0
Letters of credit outstanding, amount advanced	0		0
Value in unencumbered asset pool	1,400,000,000		1,400,000,000
Loan proceeds			75,000,000	127,000,000
Repayments of long-term debt			418,263,000	244,991,000
Percentage bearing fixed interest, amount	900,000,000		900,000,000
Percentage bearing variable interest, amount	323,000,000.0		323,000,000.0
Scheduled principal payments
Debt Instrument [Line Items]
Repayments of long-term debt			$ 3,500,000
Three Fixed-Rate Secured Loans
Debt Instrument [Line Items]
Number of retired fixed-rate secured loans			12
Fixed-rate secured loans retired			$ 199,200,000
Long-term debt, fair value	900,000,000		900,000,000
Variable rate debt
Debt Instrument [Line Items]
Long-term debt, fair value	322,700,000		322,700,000
Term Loans \| Unsecured Term Loans, Maturing July 2021
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	200,000,000		200,000,000
Long-term debt	95,000,000		95,000,000
Senior unsecured notes
Debt Instrument [Line Items]
Percentage bearing fixed interest, amount	550,000,000		550,000,000
Senior unsecured notes \| Fixed rate debt
Debt Instrument [Line Items]
Long-term debt	545,711,000		545,711,000		545,136,000
Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	600,000,000		$ 600,000,000
Debt instrument, maturity date, number of extensions \| extension			1
Debt instrument, maturity date, extension			12 months
Long-term debt	(2,882,000)		$ (2,882,000)		41,804,000
Line of credit facility, option to increase maximum borrowing capacity	1,200,000,000		1,200,000,000
Long-term line of credit	0		0
Line of credit facility, remaining borrowing capacity	$ 580,000,000.0		580,000,000.0
Loan proceeds			45,000,000.0
Repayment on credit facility			$ 120,600,000
London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)	2.02%
Minimum \| Three Fixed-Rate Secured Loans
Debt Instrument [Line Items]
Interest rate (as percent)	3.78%		3.78%
Percentage bearing fixed interest (as percent)	3.28%		3.28%
Minimum \| Variable rate debt
Debt Instrument [Line Items]
Percentage bearing variable interest (as percent)	3.12%		3.12%
Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)			150.00%
Maximum \| Three Fixed-Rate Secured Loans
Debt Instrument [Line Items]
Interest rate (as percent)	6.78%		6.78%
Percentage bearing fixed interest (as percent)	3.87%		3.87%
Maximum \| Variable rate debt
Debt Instrument [Line Items]
Percentage bearing variable interest (as percent)	3.37%		3.37%
Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate (as percent)			160.00%
KRG, LP
Debt Instrument [Line Items]
Long-term debt	$ 1,198,584,000		$ 1,198,584,000		1,543,301,000
Loan proceeds			75,000,000	127,000,000
Repayments of long-term debt			418,263,000	$ 244,991,000
KRG, LP \| Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity						$ 600,000,000
KRG, LP \| Unsecured term loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 200,000,000
KRG, LP \| Unsecured term loan \| Term Loan Due October 2025
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 250,000,000
Debt instrument, maturity date, number of extensions \| extension		3
Debt instrument, maturity date, extension		1 year
Line of credit facility, option to increase maximum borrowing capacity		$ 300,000,000
Pan Am Plaza Garage \| Revolving credit facility
Debt Instrument [Line Items]
Loan proceeds			$ 30,000,000.0