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REVENUE - Schedule of Disaggregation of Revenue by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of revenue
Total revenues	$ 808,610	$ 712,114
Inter-segment eliminations
Disaggregation of revenue
Total revenues	(107)	(4,063)
Truckload Transportation Services | Reportable segment revenues
Disaggregation of revenue
Total revenues	594,312	501,875
Werner Logistics | Reportable segment revenues
Disaggregation of revenue
Total revenues	195,836	195,558
Transportation services
Disaggregation of revenue
Total revenues	790,041	693,370
Other revenues
Disaggregation of revenue
Total revenues	$ 18,569	$ 18,744

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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