XML 14 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 15, 2025
Jun. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Document Information [Line Items]            
Entity Registrant Name HEARTLAND EXPRESS, INC.          
Entity Central Index Key 0000799233          
Document Type 10-K          
Document Period End Date Dec. 31, 2024          
Document Fiscal Year Focus 2024          
Document Fiscal Period Focus FY          
Current Fiscal Year End Date --12-31          
Entity Well-known Seasoned Issuer No          
Entity Voluntary Filers No          
Entity Shell Company false          
Entity Current Reporting Status Yes          
Amendment Flag false          
Entity Filer Category Accelerated Filer          
Entity Small Business false          
Entity Emerging Growth Company false          
Entity Common Stock, Shares Outstanding   78,549,761        
Unvested, Number of Restricted Stock Awards (in shares) 9,500 116,375   85,768 40,080 14,000.0
Entity Public Float     $ 547.1      
City Area Code 319          
Local Phone Number 645-7060          
Entity Incorporation, State or Country Code NV          
Entity File Number 0-15087          
Entity Address, Address Line One 901 Heartland Way          
Entity Address, City or Town North Liberty          
Entity Address, State or Province IA          
Security Exchange Name NASDAQ          
Entity Address, Postal Zip Code 52317          
Entity Tax Identification Number 93-0926999          
Document Transition Report false          
Entity Interactive Data Current Yes          
Trading Symbol HTLD          
Document Annual Report true          
Title of 12(g) Security Common Stock, $0.01 par value          
ICFR Auditor Attestation Flag true          
Auditor Firm ID 248          
Auditor Name GRANT THORNTON LLP          
Auditor Location Tulsa, Oklahoma          
Documents Incorporated by Reference
Portions of the registrant's definitive proxy statement relating to its 2025 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K, where indicated. The registrant's definitive proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days after December 31, 2024.
          
Document Financial Statement Error Correction [Flag] false