Name:	krc_DeferredRevenueFutureAmortizationRecognizedThereafter
Namespace Prefix:	krc_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The amount of deferred revenue expected to be recognized as rental income during year five of the five succeeding fiscal years.

No definition available.

Name:	krc_DeferredRevenueFutureAmortizationRecognizedYearFive
Namespace Prefix:	krc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of deferred revenue expected to be recognized as rental income during year four of the five succeeding fiscal years.

No definition available.

Name:	krc_DeferredRevenueFutureAmortizationRecognizedYearFour
Namespace Prefix:	krc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of deferred revenue expected to be recognized as rental income during year one of the five succeeding fiscal years.

No definition available.

Name:	krc_DeferredRevenueFutureAmortizationRecognizedYearOne
Namespace Prefix:	krc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The amount of deferred revenue expected to be recognized as rental income during year three of the five succeeding fiscal years.

No definition available.

Name:	krc_DeferredRevenueFutureAmortizationRecognizedYearThree
Namespace Prefix:	krc_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The amount of deferred revenue expected to be recognized as rental income during year two of the five succeeding fiscal years.

No definition available.

Name:	krc_DeferredRevenueFutureAmortizationRecognizedYearTwo
Namespace Prefix:	krc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)
-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 13
-Section A

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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.

No definition available.

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

Amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1)
-URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 13
-Section A