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v3.25.0.1

Organization and Ownership - Operating Properties (Details) | 12 Months Ended
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Dec. 31, 2024 ft² property building tenant development_project redevelopmentProject
Real Estate Properties [Line Items] |
Rentable Square Feet (unaudited) | 17,142,721
Stabilized Office Properties |
Real Estate Properties [Line Items] |
Number of Buildings | building | 123
Rentable Square Feet (unaudited) | 17,142,721
Number of Tenants | tenant | 428
Percentage Occupied (unaudited) | 82.80%
Stabilized Residential Properties |
Real Estate Properties [Line Items] |
Number of Properties | property | 3
Number of Units | property | 1,001
2024 Average Occupancy (unaudited) | 92.50%
In-process redevelopment projects - tenant improvement |
Real Estate Properties [Line Items] |
Rentable Square Feet (unaudited) | 100,000
Number of Properties | redevelopmentProject | 2
In-process development projects - tenant improvement |
Real Estate Properties [Line Items] |
Rentable Square Feet (unaudited) | 875,000
Number of Properties | development_project | 1

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- Definition Average Occupancy Percentage + 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 Number of Buildings + References No definition available. + Details
Name: | krc_NumberOfBuildings
Namespace Prefix: | krc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of Tenants. + References No definition available. + Details
Name: | krc_NumberOfTenants
Namespace Prefix: | krc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Real Estate Properties, Percentage Occupied + References No definition available. + Details
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Namespace Prefix: | krc_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Net rentable area for properties owned. + References No definition available. + Details
Name: | us-gaap_NetRentableArea
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |