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Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Feb. 07, 2025
Jun. 30, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-12911    
Entity Registrant Name Granite Construction Incorporated    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 77-0239383    
Entity Address, Address Line One 585 West Beach Street    
Entity Address, City or Town Watsonville    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 95076    
City Area Code 831    
Local Phone Number 724-1011    
Title of 12(b) Security Common stock, $0.01 par value    
Trading Symbol GVA    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 2.7
Entity Common Stock, Shares Outstanding   43,434,583  
Documents Incorporated by Reference
Certain information called for by Part III is incorporated by reference to the definitive Proxy Statement for the 2025 Annual Meeting of Shareholders of Granite Construction Incorporated, which will be filed with the Securities and Exchange Commission not later than 120 days after December 31, 2024.
    
Entity Central Index Key 0000861459    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false