Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenues by Segment	$ 811,096	$ 836,276	$ 1,643,810	$ 1,600,881
Operating Income (Loss) by Segment	47,198	74,923	100,584	158,434
Depreciation and Amortization by Segment	74,898	68,471	149,211	135,700
Subtotal
Segment Reporting Information [Line Items]
Revenues by Segment	814,618	836,901	1,652,593	1,602,228
Corporate
Segment Reporting Information [Line Items]
Revenues by Segment	501	478	976	867
Operating Income (Loss) by Segment	(2,230)	(2,032)	(5,316)	(3,740)
Depreciation and Amortization by Segment	505	462	1,043	905
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues by Segment	(3,522)	(625)	(8,783)	(1,347)
Truckload Transportation Services
Segment Reporting Information [Line Items]
Operating Income (Loss) by Segment	45,159	64,004	96,145	140,097
Depreciation and Amortization by Segment	67,614	62,867	134,457	124,704
Truckload Transportation Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues by Segment	570,192	613,616	1,158,522	1,172,033
Werner Logistics
Segment Reporting Information [Line Items]
Operating Income (Loss) by Segment	4,355	12,490	9,292	21,171
Depreciation and Amortization by Segment	3,865	2,351	7,924	4,619
Werner Logistics | Operating Segments
Segment Reporting Information [Line Items]
Revenues by Segment	224,549	203,861	453,218	392,869
Other | Corporate
Segment Reporting Information [Line Items]
Revenues by Segment	19,376	18,946	39,877	36,459
Operating Income (Loss) by Segment	(86)	461	463	906
Depreciation and Amortization by Segment	$ 2,914	$ 2,791	$ 5,787	$ 5,472