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Supplemental Cash Flow Information of the Operating Partnership - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
SUPPLEMENTAL CASH FLOWS INFORMATION:
Capitalized interest	$ 39,053	$ 38,115
Cash paid for interest, net of capitalized interest of $39,053 and $38,115 as of June 30, 2025 and 2024, respectively	58,692	59,946
Cash paid for amounts included in the measurement of ground lease liabilities	4,669	3,525
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	32,027	74,624
Tenant improvements funded directly by tenants	1,652	857
Remeasurement of ground lease liability and related right of use ground lease asset	0	4,782
NON-CASH FINANCING TRANSACTIONS:
Accrual of distributions payable to common unitholders	64,985	65,118
Kilroy Realty L.P.
SUPPLEMENTAL CASH FLOWS INFORMATION:
Capitalized interest	39,053	38,115
Cash paid for interest, net of capitalized interest of $39,053 and $38,115 as of June 30, 2025 and 2024, respectively	58,692	59,946
Cash paid for amounts included in the measurement of ground lease liabilities	4,669	3,525
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development and redevelopment properties	32,027	74,624
Tenant improvements funded directly by tenants	1,652	857
Remeasurement of ground lease liability and related right of use ground lease asset	0	4,782
NON-CASH FINANCING TRANSACTIONS:
Accrual of distributions payable to common unitholders	$ 64,985	$ 65,118

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