Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Revenues by Segment	$ 832,714	$ 764,605
Operating Income (Loss) by Segment	53,386	83,511
Depreciation and Amortization by Segment	74,313	67,229
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues by Segment	(5,261)	(722)
Truckload Transportation Services
Segment Reporting Information [Line Items]
Revenues by Segment	588,330	558,417
Operating Income (Loss) by Segment	50,986	76,093
Depreciation and Amortization by Segment	66,843	61,837
Werner Logistics
Segment Reporting Information [Line Items]
Revenues by Segment	228,669	189,008
Operating Income (Loss) by Segment	4,937	8,681
Depreciation and Amortization by Segment	4,059	2,268
Other
Segment Reporting Information [Line Items]
Revenues by Segment	20,501	17,513
Operating Income (Loss) by Segment	549	445
Depreciation and Amortization by Segment	2,873	2,681
Corporate
Segment Reporting Information [Line Items]
Revenues by Segment	475	389
Operating Income (Loss) by Segment	(3,086)	(1,708)
Depreciation and Amortization by Segment	538	443
Subtotal
Segment Reporting Information [Line Items]
Revenues by Segment	$ 837,975	$ 765,327