Revenue - Disaggregation of Revenue by Revenue Source (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of revenue
Revenues by Segment	$ 817,744	$ 827,606	$ 2,461,554	$ 2,428,487
Inter-segment eliminations
Disaggregation of revenue
Revenues by Segment	(4,402)	(402)	(13,185)	(1,749)
Truckload Transportation Services | Operating Segments
Disaggregation of revenue
Revenues by Segment	572,195	621,866	1,730,717	1,793,899
Werner Logistics | Operating Segments
Disaggregation of revenue
Revenues by Segment	230,252	187,138	683,470	580,007
Transportation services
Disaggregation of revenue
Revenues by Segment	798,045	808,602	2,401,002	2,372,157
Other revenues
Disaggregation of revenue
Revenues by Segment	$ 19,699	$ 19,004	$ 60,552	$ 56,330