Dispositions and Real Estate Held for Sale - Schedule of Long-Lived Asset Held for Sale (Details) $ in Thousands	Jun. 30, 2025 USD ($) building	Dec. 31, 2024 USD ($)
Real estate assets and other assets held for sale
Deferred leasing costs and acquisition-related intangibles, net	$ 208,266	$ 225,937
Total real estate and other assets held for sale, net	255,795	0
Liabilities of real estate assets held for sale
Deferred revenue and acquisition-related intangible liabilities, net	131,606	142,437
Rents received in advance and tenant security deposits	73,561	71,003
Liabilities of real estate assets held for sale	$ 4,887	$ 0
Disposal Group, Held-for-Sale, Not Discontinued Operations \| Silicon Valley
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Buildings \| building	4
Sales price	$ 365,000
Real estate assets and other assets held for sale
Land and improvements	118,514
Buildings and improvements	194,357
Total real estate held for sale	312,871
Accumulated depreciation and amortization	(72,526)
Total real estate held for sale, net	240,345
Current receivables, net	36
Deferred rent receivables, net	6,525
Deferred leasing costs and acquisition-related intangibles, net	7,782
Prepaid expenses and other assets, net	1,107
Total real estate and other assets held for sale, net	255,795
Liabilities of real estate assets held for sale
Accounts payable and accrued expenses and other liabilities	591
Deferred revenue and acquisition-related intangible liabilities, net	1,091
Rents received in advance and tenant security deposits	3,205
Liabilities of real estate assets held for sale	$ 4,887

Disposal Group, Including Discontinued Operation, Advance Rent, Including Tenant Security Deposits

No definition available.

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

- 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.