General	6 Months Ended
General	Jun. 30, 2024
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, 2023 (“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, 2024 and the results of our operations and cash flows for the periods presented. The December 31, 2023 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. During the first quarter of 2024, we reorganized our operational structure to more closely align with our two reportable segments, Construction and Materials. Previously, leaders within our three former operating groups of California, Central and Mountain managed both Construction and Materials operations within each group. This change allows us to better leverage our expertise within each reportable segment with leadership having direct oversight of their respective segment operations. As a result of the reorganization, we will no longer disclose financial information by operating group. There were no material impacts to our unaudited condensed consolidated financial statements and no changes to our reportable segments. Due to the changes in our operational structure and the resulting changes to reporting units, we performed quantitative goodwill impairment tests, immediately before and after the reorganization, on the affected reporting units. These reporting units previously aligned with our operating group structure, but have now been combined into two reporting units, Construction and Materials. The reporting units associated with the acquisition of Lehman-Roberts Company and Memphis Stone & Gravel Company (collectively, "LRC/MSG") were not impacted by the reorganization. For each of the affected reporting units, we calculated the estimated fair value consistent with the annual impairment assessment using the discounted cash flows and market multiple methods. These tests indicated that the estimated fair values of the affected reporting units exceeded their carrying amounts with headroom in excess of 25%. Share Repurchase Program: As announced on February 3, 2022, on February 1, 2022, the Board of Directors authorized us to purchase up to $300.0 million of our common stock at management’s discretion. During the three and six months ended June 30, 2024, we repurchased 225,000 shares under this authorization at an average price of $59.32 per share for $13.3 million. The share repurchases are included in Repurchases of common stock on the Condensed Consolidated Statements of Shareholders’ Equity and within Financing activities on the Condensed Consolidated Statement of Cash Flows. As of June 30, 2024, $218.2 million of the authorization remained available. 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, 2024 are not necessarily indicative of the results to be expected for the full year. Subsequent Event: On July 31, 2024, we agreed, subject to customary closing conditions, to acquire Dickerson & Bowen, Inc. with the transaction expected to close in the third quarter. Dickerson & Bowen is an aggregates, asphalt, and highway construction company serving central and southern Mississippi. This acquisition is not expected to have a material impact on our results of operations.