v3.3.1.900

Dispositions and Real Estate Assets Held for Sale (Details) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 21, 2016 USD ($) | Jan. 13, 2016 USD ($) | Dec. 31, 2014 USD ($) ft² a property | Dec. 31, 2015 USD ($) ft² a building project | Dec. 31, 2014 USD ($) ft² a building property | Dec. 31, 2013 USD ($) ft² building | Jan. 31, 2014 ft²
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Property Plant Equipment |  |  |  |  | $ 109,950 | $ 0 | $ 0 |
Number of real estate properties |  |  |  | 5 | 2 | 5 |  |
Number of Real Estate Properties Sold | building |  |  |  |  | 10 | 17 | 3 |
Net Rentable Area | ft² |  |  |  | 1,471,319 | 1,046,394 | 1,471,319 | 200,306 | 79,000
Dispositions Sales Price | [1] |  |  |  | $ 309,200 | $ 399,500 | $ 56,900 |
Proceeds from Sale of Real Estate Held-for-investment |  |  |  |  | $ 319,639 | $ 427,544 | $ 21,178 |
15050 N.E. 36th St., Redmond, WA [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  | 1 |  |  |
Net Rentable Area | ft² |  |  |  |  | 122,103 |  |  |
Dispositions Sales Price | [1] |  |  |  | $ 51,200 |  |  |
Carlsbad Oaks - Lot 7 [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Gain (Loss) on Sale of Properties |  |  |  |  | $ (200) |  |  |
Area of Land | a | [2] |  |  |  | 7.6 |  |  |
Dispositions Sales Price | [2],[3] |  |  |  | $ 4,500 |  |  |
Von Karman, Irvine, California [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Gain (Loss) on Sale of Properties |  |  |  |  | 17,300 |  |  |
Area of Land | a | [2] |  |  | 8.5 |  | 8.5 |  |
Dispositions Sales Price | [2],[3] |  |  |  | $ 26,000 | $ 26,000 |  |
Torrey Santa Fe Properties [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of real estate properties | project |  |  |  |  | 4 |  |  |
Net Rentable Area | ft² | [4] |  |  |  | 465,812 |  |  |
San Diego Properties Tranches 1 & 2, San Diego, CA [Member] [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  | 9 |  |  |
Net Rentable Area | ft² |  |  |  |  | 924,291 |  |  |
Dispositions Sales Price | [1],[5] |  |  |  | $ 258,000 |  |  |
San Diego Properties, San Diego, CA [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building | [6] |  |  |  |  | 12 |  |
Net Rentable Area | ft² | [6] |  |  | 1,049,035 |  | 1,049,035 |  |
Dispositions Sales Price | [1] |  |  |  |  | $ 294,700 |  |
9785&9791 Towne Centre Drive, San Diego CA [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  |  | 2 |  |
Net Rentable Area | ft² |  |  |  | 126,000 |  | 126,000 |  |
Dispositions Sales Price | [1] |  |  |  |  | $ 29,500 |  |
111 Pacifica [Member] [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  |  | 1 |  |
Net Rentable Area | ft² |  |  |  | 67,496 |  | 67,496 |  |
Dispositions Sales Price | [1] |  |  |  |  | $ 15,100 |  |
4040 Civic [Member] [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  |  | 1 |  |
Net Rentable Area | ft² |  |  |  | 130,237 |  | 130,237 |  |
Dispositions Sales Price | [1] |  |  |  |  | $ 34,900 |  |
999 Town &Country[Member] [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  |  | 1 |  |
Net Rentable Area | ft² |  |  |  | 98,551 |  | 98,551 |  |
Dispositions Sales Price | [1] |  |  |  |  | $ 25,300 |  |
Agoura Road, 26541, Calabasas, CA [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  |  |  | 1 |
Agoura Road Calabasas California [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Net Rentable Area | ft² |  |  |  |  |  |  | 90,156 |
Dispositions Sales Price | [1] |  |  |  |  |  | $ 14,700 |
Kaiser Boulevard, Anaheim, California [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  |  |  | 1 |
Net Rentable Area | ft² |  |  |  |  |  |  | 59,790 |
Dispositions Sales Price | [1] |  |  |  |  |  | $ 9,600 |
Directors Place, Sorrento Mesa, California One [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Number of Real Estate Properties Sold | building |  |  |  |  |  |  | 1 |
Net Rentable Area | ft² |  |  |  |  |  |  | 50,360 |
Dispositions Sales Price | [1] |  |  |  |  |  | $ 32,600 |
10850 Via Frontera San Diego CA [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Gain (Loss) on Disposition of Property Plant Equipment |  |  |  |  |  | $ 3,490 |  |
Area of Land | a | [7] |  |  | 21.0 |  | 21.0 |  |
Dispositions Sales Price | [3],[7] |  |  |  |  | $ 33,100 |  |
Restricted cash [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Proceeds from Sale of Real Estate Held-for-investment |  |  |  | $ 59,200 |  | $ 59,200 |  |
Land and Land Improvements [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 10,534 |  |  |
Building and Building Improvements [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 144,716 |  |  |
Undeveloped Land [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 4,824 |  |  |
Total real estate held for sale [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 160,074 |  |  |
Accumulated depreciation and amortization [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | (46,191) |  |  |
Total real estate held for sale, net [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 113,883 |  |  |
Deferred rent receivables, net [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 2,500 |  |  |
Deferred Leasing Costs [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 1,115 |  |  |
Prepaid Expenses and Other Current Assets [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 168 |  |  |
Assets Held-for-sale [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 117,666 |  |  |
Secured Debt [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 561 |  |  |
Accounts Payable and Accrued Liabilities [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 2,497 |  |  |
Deferred Lease Revenue [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 2,899 |  |  |
Rents received in advance and tenant security deposits [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | 1,586 |  |  |
Liabilities and deferred revenue of real estate assets held for sale [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Real Estate Held-for-sale |  |  |  |  | $ 7,543 |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Dispositions Sales Price |  | $ 262,300 | $ 4,500 |  |  |  |  |
[1] | Represents gross sales price before the impact of broker commissions and closing costs.
[2] | This transaction resulted in a gain on sale of $17.3 million.
[3] | Represents gross sales price before the impact of commissions and closing costs.
[4] | Estimated rentable square feet upon completion.
[5] | The San Diego Properties - Tranche 1 includes the following properties: 10770 Wateridge Circle, 6200 Greenwich Drive, and 6220 Greenwich Drive. The San Diego Properties - Tranche 2 includes the following properties: 6260 Sequence Drive, 6290, Sequence Drive, 6310 Sequence Drive, 6340 Sequence Drive, 6350 Sequence Drive and 4921 Directors Place.
[6] | The San Diego Properties included the following: 10020 Pacific Mesa Boulevard, 6055 Lusk Avenue, 5010 and 5005 Wateridge Vista Drive, 15435 and 15445 Innovation Drive, and 15051, 15073, 15231, 15253, 15333 and 15378 Avenue of Science. These properties were held for sale as of December 31, 2013.
[7] | This transaction resulted in a gain on sale of $3.5 million.

X
- Definition Represents the sales price of dispositions during the reporting period. + References No definition available. + Details
Name: | krc_DispositionsSalesPrice
Namespace Prefix: | krc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of Real Estate Properties Sold + References No definition available. + Details
Name: | krc_NumberofRealEstatePropertiesSold
Namespace Prefix: | krc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of land held. + References No definition available. + Details
Name: | us-gaap_AreaOfLand
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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

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

X
- Definition Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_RealEstateHeldforsale
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_A15050N.E.36thSt.RedmondWAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_CarlsbadOaksLot7Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_VonKarmanIrvineCaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_TorreySantaFePropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_SanDiegoPropertiesTranches12SanDiegoCAMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_SanDiegoPropertiesSanDiegoCAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_A97859791TowneCentreDriveSanDiegoCAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_A111PacificaMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_A4040CivicMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_A999TownCountryMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_AgouraRoad26541CalabasasCAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_AgouraRoadCalabasasCaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_KaiserBoulevardAnaheimCaliforniaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_DirectorsPlaceSorrentoMesaCaliforniaOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=krc_A10850ViaFronteraSanDiegoCAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_RestrictedCashMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_LandAndLandImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_UndevelopedLandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_TotalrealestateheldforsaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_AccumulateddepreciationandamortizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_TotalrealestateheldforsalenetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_DeferredrentreceivablesnetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_AssetsHeldForSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_AccountsPayableAndAccruedLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_DeferredLeaseRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_RentsreceivedinadvanceandtenantsecuritydepositsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=krc_LiabilitiesanddeferredrevenueofrealestateassetsheldforsaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |