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Revisions in Estimates (Tables) | 3 Months Ended
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Mar. 31, 2025
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Change in Accounting Estimates | The projects with increases from revisions in estimates, which individually had an impact of $5.0 million or more on gross profit, are summarized as follows (dollars in millions, except per share data):
|  | Three Months Ended March 31,
|  |  | 2025 |  |  | 2024
Number of projects with upward estimate changes |  |  | 1 |  |  |  | 1 |
Increase in gross profit, net |  | $ | 8.3 |  |  | $ | 7.4 |
Increase to project profitability, net |  | $ | 8.3 |  |  | $ | 7.4 |
Decrease to net loss |  | $ | 6.2 |  |  | $ | 5.6 |
Decrease to net loss attributable to Granite Construction Incorporated |  | $ | 6.2 |  |  | $ | 5.6 |
Decrease to net loss per diluted share attributable to common shareholders |  | $ | 0.14 |  |  | $ | 0.13 |
The projects with decreases from revisions in estimates, which individually had an impact of $5.0 million or more on gross profit, are summarized as follows (dollars in millions, except per share data):
|  | Three Months Ended March 31, |  |
|  |  | 2025 |  |  | 2024 |  |  |  |  |  |
Number of projects with downward estimate changes |  |  | 1 |  |  |  | 1 |  |  |  |  |  |  |
Reduction in gross profit, net |  | $ | 8.8 |  |  | $ | 7.7 |  |  |  |  |  |  |
Decrease to project profitability, net |  | $ | 8.8 |  |  | $ | 7.7 |  |  |  |  |  |  |
Increase to net loss |  | $ | 6.6 |  |  | $ | 5.8 |  |  |  |  |  |  |
Increase to net loss attributable to Granite Construction Incorporated |  | $ | 6.6 |  |  | $ | 5.8 |  |  |  |  |  |  |
Increase to net loss per diluted share attributable to common shareholders |  | $ | 0.15 |  |  | $ | 0.13 |  |  |  |  |  |  |

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- Definition Tabular disclosure of the change in an accounting estimate, including a change that occurs in an interim period. If a change in accounting estimate affects several future periods (for example, a change in the service life of a depreciable asset) disclose the effect on income from continuing operations, net income (or other appropriate captions of changes in the applicable net assets or performance indicator), and any related per-share amounts of the current period. Disclosure of the effects of a change in an accounting estimate that occurs in the ordinary course of business (such as uncollectible accounts or inventory obsolescence) is not required, unless the effect is material. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482989/270-10-45-14 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483443/250-10-50-4 + Details
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