v3.3.1.900

Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |  |  |
Total deferred leasing costs and acquisition-related intangible assets, net |  | $ 176,683 |  | $ 201,926
Acquisition-related Intangible Liabilities, Net [Abstract] |  |  |  |
Total acquisitions-related intangible liabilities, net | [1] | 32,324 |  | 43,427
Deferred Leasing Costs [Member] |  |  |  |
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |  |  |
Finite-lived intangible assets/liabilities, gross |  | 205,888 |  | 216,102
Accumulated amortization |  | (72,745) |  | (74,904)
Finite-lived intangible assets/liabilities, net |  | 133,143 |  | 141,198
Above Market Operating Leases [Member] |  |  |  |
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |  |  |
Finite-lived intangible assets/liabilities, gross |  | 10,989 |  | 20,734
Accumulated amortization |  | (6,739) |  | (13,952)
Finite-lived intangible assets/liabilities, net |  | 4,250 | [2] | 6,782
Leases, Acquired-in-Place [Member] |  |  |  |
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |  |  |
Finite-lived intangible assets/liabilities, gross |  | 72,639 |  | 97,250
Accumulated amortization |  | (33,810) |  | (43,773)
Finite-lived intangible assets/liabilities, net |  | 38,829 |  | 53,477
Below-Market Ground Lease Obligation [Member] |  |  |  |
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |  |  |
Finite-lived intangible assets/liabilities, gross |  | 490 |  | 490
Accumulated amortization |  | (29) |  | (21)
Finite-lived intangible assets/liabilities, net |  | 461 | [3] | 469
Below Market Operating Lease [Member] |  |  |  |
Acquisition-related Intangible Liabilities, Net [Abstract] |  |  |  |
Acquisition-related intangible liabilities, gross |  | 53,502 |  | 68,051
Accumulated amortization |  | (27,074) |  | (30,620)
Acquisition-related intangible liabilities, net |  | 26,428 | [4] | 37,431
Above-Market Ground Lease Obligation [Member] |  |  |  |
Acquisition-related Intangible Liabilities, Net [Abstract] |  |  |  |
Acquisition-related intangible liabilities, gross |  | 6,320 |  | 6,320
Accumulated amortization |  | (424) |  | (324)
Acquisition-related intangible liabilities, net |  | $ 5,896 | [5] | $ 5,996
[1] | See Note 2 “Basis of Presentation and Significant Accounting Policies” and Note 5 “Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, net” for additional information.
[2] | Represents estimated annual amortization related to above-market operating leases. Amounts will be recorded as a decrease to rental income in the consolidated statements of operations.
[3] | Represents estimated annual amortization related to below-market ground lease obligations. Amounts will be recorded as an increase to ground lease expense in the consolidated statements of operations
[4] | Represents estimated annual amortization related to below-market operating leases. Amounts will be recorded as an increase to rental income in the consolidated statements of operations.
[5] | Represents estimated annual amortization related to above-market ground lease obligations. Amounts will be recorded as a decrease to ground lease expense in the consolidated statements of operations

X
- Definition The identifiable intangible liability established upon acquisition based on an unfavorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date and the ground lease obligation established upon acquisition based on an unfavorable difference between the terms of the acquired ground lease and the current market terms for that lease at the acquisition date. + References No definition available. + Details
Name: | krc_AcquisitionRelatedIntangibleLiabilitiesNet
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Acquisition-related Intangible Liabilities, Net [Abstract] + References No definition available. + Details
Name: | krc_AcquisitionRelatedIntangibleLiabilitiesNetAbstract
Namespace Prefix: | krc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred Leasing Costs and Acquisition-related Intangible Assets. + References No definition available. + Details
Name: | krc_DeferredLeasingCostsAndAcquisitionRelatedIntangibleAssetsAbstract
Namespace Prefix: | krc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents (1) costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction; (2) the identifiable intangible asset established upon acquisition based on a favorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date; and (3) the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. This element is net of accumulated amortization. + References No definition available. + Details
Name: | krc_DeferredLeasingCostsAndAcquisitionRelatedIntangibleAssetsNet
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Accumulated amount of amortization of intangible liabilities with a finite life. + References No definition available. + Details
Name: | krc_Finitelivedintangibleliabilitiesaccumulatedamortization
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before amortization of intangible liabilities with a finite life. + References No definition available. + Details
Name: | krc_Finitelivedintangibleliabilitiesgross
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after amortization of intangible liabilities witth a finite life. + References No definition available. + Details
Name: | krc_Finitelivedintangibleliabilitiesnet
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | krc_FiniteLivedIntangibleAssetsAndLiabilitiesByMajorClassAxis=krc_DeferredLeasingCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | krc_FiniteLivedIntangibleAssetsAndLiabilitiesByMajorClassAxis=us-gaap_AboveMarketLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | krc_FiniteLivedIntangibleAssetsAndLiabilitiesByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | krc_FiniteLivedIntangibleAssetsAndLiabilitiesByMajorClassAxis=krc_LeasesAcquiredInPlaceBelowMarketGroundLeaseAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | krc_FiniteLivedIntangibleAssetsAndLiabilitiesByMajorClassAxis=krc_BelowMarketLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | krc_FiniteLivedIntangibleAssetsAndLiabilitiesByMajorClassAxis=krc_LeasesAcquiredInPlaceAboveMarketGroundLeasesAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |