Description of the Plan - Forfeited Accounts (Details) - ArcBest 401(k) and DC Retirement Plan - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Description of the Plan | ||
| Forfeited nonvested accounts | $ 646,457 | $ 187,587 |
| Amount of forfeited nonvested accounts used to offset employer contributions | 200,000 | 1,100,292 |
| Amount of forfeited nonvested accounts used to offset employer defined contributions | $ 650,000 | $ 0 |