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Commitments and Contingencies - Minimum Commitment Under Ground Leases (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Minimum commitment under our ground leases |  |
Remaining 2024 | $ 1,684 |
2025 | 6,772 |
2026 | 6,809 |
2027 | 6,850 |
2028 | 6,869 |
2029 | 6,869 |
Thereafter | 367,744 |
Total undiscounted cash flows | 403,597 |
Present value discount | (274,991) |
Ground lease liabilities | $ 128,606 | $ 124,353
Period after which ground lease rentals are adjusted based on fair market value and the Consumer Price Index | 5 years |
Duration of ground lease increase | 10 years |
Average annual percentage rent for previous ten years (percent) | 60.00% |
Previous period included in average annual rent percentage for ten-year increases | 3 years |
Ground lease fixed ground rent increase, percent | 5.00% |
Percentage rent increase every year | 2.00% |
Ground lease reset period | 10 years |
Remaining ground lease obligation period | 10 years |

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- Definition Ground Lease, Liability + References No definition available. + Details
Name: | krc_GroundLeaseLiability
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Ground Lease, Minimum Rent Increase, Five Years, Percentage of Annual Percentage Rent + References No definition available. + Details
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Namespace Prefix: | krc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Ground Lease, Minimum Rent Increase, Percentage of Annual Percentage Rent for the previous 5 years + References No definition available. + Details
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Namespace Prefix: | krc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ground Lease, Minimum Rent Increase, Percentage of Annual Percentage Rent Two + References No definition available. + Details
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Namespace Prefix: | krc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Ground Lease, Minimum Rent Increase, Period of Increase Two + References No definition available. + Details
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Namespace Prefix: | krc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ground Lease, Previous Period Included in Average Annual Rent Percentage, Rent Two + References No definition available. + Details
Name: | krc_GroundLeasePreviousPeriodIncludedInAverageAnnualRentPercentageRentTwo
Namespace Prefix: | krc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Ground Lease Reset Period + References No definition available. + Details
Name: | krc_GroundLeaseResetPeriod
Namespace Prefix: | krc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee, Ground Lease, Liability, to be Paid + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityToBePaid
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lessee, Ground Lease, Liability, to be Paid, after Year Five + References No definition available. + Details
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Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lessee, Ground Lease, Liability, to be Paid, Remainder of Fiscal Year + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityToBePaidRemainderOfFiscalYear
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lessee, Ground Lease, Liability, to be Paid, Year Five + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityToBePaidYearFive
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Ground Lease, Liability, to be Paid, Year Four + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityToBePaidYearFour
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Ground Lease, Liability, to be Paid, Year One + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityToBePaidYearOne
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Ground Lease, Liability, to be Paid, Year Three + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityToBePaidYearThree
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Ground Lease, Liability, to be Paid, Year Two + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityToBePaidYearTwo
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Lessee, Ground Lease, Liability, Undiscounted Excess Amount + References No definition available. + Details
Name: | krc_LesseeGroundLeaseLiabilityUndiscountedExcessAmount
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Period for Ground lease rentals adjustment. + References No definition available. + Details
Name: | krc_PeriodForGroundLeaseRentalsAdjustment
Namespace Prefix: | krc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Remaining Ground Lease Obligation Period + References No definition available. + Details
Name: | krc_RemainingGroundLeaseObligationPeriod
Namespace Prefix: | krc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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