Party-in-Interest Transactions (Details) - ArcBest 401(k) and DC Retirement Plan - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Party-in-Interest Transactions
Administrative expense	$ 468,267	$ 457,977
CapTrust Partners, LLC
Party-in-Interest Transactions
Administrative expense	93,500	75,338
Schwab Retirement Plan Services, Inc
Party-in-Interest Transactions
Administrative expense	308,829	288,767
Other party-in-interest
Party-in-Interest Transactions
Administrative expense	$ 65,938	$ 93,873

Amount of decrease in net asset available for benefit from administrative expense incurred by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-05(a)(Schedule III))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 45
-Paragraph 7
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477063/962-205-45-7

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration