Summary of Significant Accounting Policies (Details) - ArcBest 401(k) and DC Retirement Plan - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Aug. 29, 2017 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Summary of Significant Accounting Policies | |||
| Allowance for credit loss | $ 0 | $ 0 | |
| Tax determination letter date | Aug. 29, 2017 | ||
| Non-investment related fees | $ 39 |
| X | ||||||||||
- Definition Amount of administrative fee per participant incurred by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of allowance for credit loss on note receivable from participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Date of tax determination letter for employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), in YYYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Details
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