Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues by Segment	$ 769,080	$ 832,714
Operating Income (Loss) by Segment	15,588	53,386
Depreciation and Amortization by Segment	74,270	74,313
Subtotal
Segment Reporting Information [Line Items]
Revenues by Segment	773,151	837,975
Operating Segments | Truckload Transportation Services
Segment Reporting Information [Line Items]
Revenues by Segment	551,126	588,330
Operating Income (Loss) by Segment	20,840	50,986
Depreciation and Amortization by Segment	66,933	66,843
Operating Segments | Werner Logistics
Segment Reporting Information [Line Items]
Revenues by Segment	202,482	228,669
Operating Income (Loss) by Segment	(2,329)	4,937
Depreciation and Amortization by Segment	3,667	4,059
Corporate
Segment Reporting Information [Line Items]
Revenues by Segment	590	475
Operating Income (Loss) by Segment	(2,714)	(3,086)
Depreciation and Amortization by Segment	936	538
Corporate | Other
Segment Reporting Information [Line Items]
Revenues by Segment	18,953	20,501
Operating Income (Loss) by Segment	(209)	549
Depreciation and Amortization by Segment	2,734	2,873
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues by Segment	$ (4,071)	$ (5,261)