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Partners' Capital of the Operating Partnership - At-The-Market Stock Offering, Common Units and Accrued Distributions (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Accrued distributions |  |
Accrued distributions (Note 15) | $ 64,850 | $ 64,440
Operating Partnership |  |
General Partners' Capital Account |  |
Ownership interest (percent) | 99.00% | 99.00%
Kilroy Realty L.P. |  |
Accrued distributions |  |
Accrued distributions (Note 15) | $ 64,850 | $ 64,440
Kilroy Realty L.P. | Restricted Stock Units (RSUs) |  |
Accrued distributions |  |
Accrued distributions (Note 15) | $ 484 | $ 510
RSUs (in shares) | 861,385 | 908,336
Kilroy Realty L.P. | Market measure-based Restricted Stock Units (RSUs) |  |
Accrued distributions |  |
Number of RSUs outstanding (in shares) | 828,442 | 1,083,086
Kilroy Realty L.P. | Partners’ Capital |  |
Accrued distributions |  |
Accrued distributions (Note 15) | $ 64,850 | $ 64,440
Kilroy Realty L.P. | Partners capital general partner |  |
Accrued distributions |  |
Accrued distributions (Note 15) | 63,745 | 63,309
Kilroy Realty L.P. | Partners capital limited partner |  |
Accrued distributions |  |
Accrued distributions (Note 15) | $ 621 | $ 621
Non-Affiliated Investors | Operating Partnership |  |
General Partners' Capital Account |  |
Ownership interest (percent) | 1.00% | 1.00%
Common Units | Kilroy Realty L.P. |  |
General Partners' Capital Account |  |
Company owned common units in the Operating Partnership (in shares) | 118,046,674 | 117,239,558
Non-affiliated investors and other common units of the Operating Partnership (in shares) | 1,150,574 | 1,150,574
Common Units | Non-Affiliated Investors |  |
General Partners' Capital Account |  |
Non-affiliated investors and other common units of the Operating Partnership (in shares) | 1,150,574 | 1,150,574

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