Revenue - Disaggregation of Revenue by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of revenue
Revenues by Segment	$ 811,096	$ 836,276	$ 1,643,810	$ 1,600,881
Inter-segment eliminations
Disaggregation of revenue
Revenues by Segment	(3,522)	(625)	(8,783)	(1,347)
Truckload Transportation Services | Operating Segments
Disaggregation of revenue
Revenues by Segment	570,192	613,616	1,158,522	1,172,033
Werner Logistics | Operating Segments
Disaggregation of revenue
Revenues by Segment	224,549	203,861	453,218	392,869
Transportation services
Disaggregation of revenue
Revenues by Segment	791,219	816,852	1,602,957	1,563,555
Other revenues
Disaggregation of revenue
Revenues by Segment	$ 19,877	$ 19,424	$ 40,853	$ 37,326