v3.26.1
Document and Entity Information
12 Months Ended
Dec. 31, 2025
Document Information [Line Items]  
Document Type 11-K
Entity Registrant Name ArcBest Corporation
Entity Central Index Key 0000894405
Amendment Flag false
ArcBest 401(k) and DC Retirement Plan  
Document Information [Line Items]  
Document Type 11-K
Entity Tax Identification Number 71-0673405
Amendment Flag false