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Stockholders' Equity of the Company - At-The-Market Offering and Derivatives and Distributions (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Dividends and Distributions payable to: |  |
Accrued distributions (Note 15) | $ 64,850 | $ 64,440
Outstanding Shares and Units: |  |
Common stock (in shares) | 118,046,674 | 117,239,558
Restricted Stock Units (RSUs) |  |
Outstanding Shares and Units: |  |
RSUs (in shares) | 861,385 | 908,336
Kilroy Realty L.P. |  |
Dividends and Distributions payable to: |  |
Accrued distributions (Note 15) | $ 64,850 | $ 64,440
Kilroy Realty L.P. | Restricted Stock Units (RSUs) |  |
Dividends and Distributions payable to: |  |
Accrued distributions (Note 15) | $ 484 | $ 510
Kilroy Realty L.P. | Market measure-based Restricted Stock Units (RSUs) |  |
Outstanding Shares and Units: |  |
Number of RSUs outstanding (in shares) | 828,442 | 1,083,086
Kilroy Realty L.P. | Common Units |  |
Outstanding Shares and Units: |  |
Noncontrolling common units ( in shares ) | 1,150,574 | 1,150,574
Noncontrolling common units | Common Units |  |
Outstanding Shares and Units: |  |
Noncontrolling common units ( in shares ) | 1,150,574 | 1,150,574
Common stockholders and noncontrolling unitholders |  |
Dividends and Distributions payable to: |  |
Accrued distributions (Note 15) | $ 64,850 | $ 64,440
Common stockholders |  |
Dividends and Distributions payable to: |  |
Accrued distributions (Note 15) | $ 63,745 | $ 63,309
Outstanding Shares and Units: |  |
Common stock (in shares) | 118,046,674 | 117,239,558
Common Units |  |
Dividends and Distributions payable to: |  |
Accrued distributions (Note 15) | $ 621 | $ 621

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