SEGMENT INFORMATION - Narrative (Details)	3 Months Ended
Mar. 31, 2026 segment division
Segment Reporting [Line Items]
Number of reportable segments	2
Truckload Transportation Services
Segment Reporting [Line Items]
Number of operating segments	2
Werner Logistics
Segment Reporting [Line Items]
Number of divisions \| division	3

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.

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