v3.26.1
Schedule H, Line 4a - Schedule of Delinquent Participant Contributions (Details) - ArcBest 401(k) and DC Retirement Plan - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Schedule H, Line 4a - Schedule of Delinquent Participant Contributions    
Entity tax identification number 71-0673405  
Plan number 002  
EBP, Schedule of Delinquent Participant Contribution, Late Repayment Included [true false]   false
Participant Contributions Transferred Late to Plan   $ 298
Total Fully Corrected under VFCP and PTE 2002-51   $ 298