General	6 Months Ended
General	Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General	General Basis of Presentation: The condensed consolidated financial statements included herein have been prepared by Granite Construction Incorporated (“we,” “us,” “our,” the “Company” or “Granite”) pursuant to the rules and regulations of the Securities and Exchange Commission, are unaudited and should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2024 (“Annual Report”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted. Further, the condensed consolidated financial statements reflect, in the opinion of management, all normal recurring adjustments necessary to state fairly our financial position at June 30, 2025 and the results of our operations and cash flows for the periods presented. The December 31, 2024 condensed consolidated balance sheet data included herein was derived from audited consolidated financial statements but does not include all disclosures required by U.S. GAAP. Seasonality: Our operations are typically affected more by weather conditions during the first and fourth quarters of our fiscal year which may alter our construction schedules and can create variability in our revenues and profitability. Therefore, the results of operations for the three and six months ended June 30, 2025 are not necessarily indicative of the results to be expected for the full year. Subsequent Events: Fifth Amended and Restated Credit Agreement On August 5, 2025, we entered into the Fifth Amended and Restated Credit Agreement (the “A&R Credit Agreement”), which provides for (1) a $600.0 million senior secured revolving credit facility (the “Revolver”), (2) a $600.0 million senior secured term loan (the "Initial Term Loan") and (3) an additional $75.0 million senior secured term loan (see Note 14 for further information). Warren Paving Acquisition On August 5, 2025, we completed the acquisition of Slats Lucas, LLC and Warren Paving, Inc. (collectively, “Warren Paving”) for $540.0 million, subject to customary closing adjustments. We purchased all of the outstanding equity interests in Warren Paving, which is a vertically-integrated asphalt contractor and aggregate producer with operations along the Gulf Coast and Mississippi River. This acquisition aligns with our strategy to expand our presence into new geographies with future growth opportunities while supporting our existing operations, particularly the Materials segment. Papich Construction Acquisition On August 5, 2025, we completed the acquisition of Papich Construction Company, Inc. (“Papich Construction”) for $170.0 million, subject to customary closing adjustments. We purchased all of the issued and outstanding common stock of Papich Construction, which is a provider of construction services and materials in California’s Central Coast and Central Valley regions. This acquisition aligns with our strategy of enhancing our vertical integration by strengthening our existing home markets. These acquisitions were funded with proceeds from the Initial Term Loan, a $10.0 million draw on our Revolver and from cash on hand. The initial accounting for these transactions is incomplete as we are still in the preliminary stages of assessing the fair value of the underlying net tangible and intangible assets. The results of Warren Paving and Papich Construction will be included in our consolidated results beginning in the third quarter of 2025.