Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Revenues by Segment	$ 817,744	$ 827,606	$ 2,461,554	$ 2,428,487
Operating Income (Loss) by Segment	37,900	76,261	138,484	234,695
Depreciation and Amortization by Segment	74,586	70,397	223,797	206,097
Subtotal
Segment Reporting Information [Line Items]
Revenues by Segment	822,146	828,008	2,474,739	2,430,236
Corporate
Segment Reporting Information [Line Items]
Revenues by Segment	487	535	1,463	1,402
Operating Income (Loss) by Segment	(2,808)	(1,910)	(8,124)	(5,650)
Depreciation and Amortization by Segment	139	520	1,182	1,425
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues by Segment	(4,402)	(402)	(13,185)	(1,749)
Truckload Transportation Services | Operating Segments
Segment Reporting Information [Line Items]
Revenues by Segment	572,195	621,866	1,730,717	1,793,899
Operating Income (Loss) by Segment	38,846	74,117	134,991	214,214
Depreciation and Amortization by Segment	67,819	64,579	202,276	189,283
Werner Logistics | Operating Segments
Segment Reporting Information [Line Items]
Revenues by Segment	230,252	187,138	683,470	580,007
Operating Income (Loss) by Segment	2,012	5,145	11,304	26,316
Depreciation and Amortization by Segment	3,682	2,423	11,606	7,042
Other | Corporate
Segment Reporting Information [Line Items]
Revenues by Segment	19,212	18,469	59,089	54,928
Operating Income (Loss) by Segment	(150)	(1,091)	313	(185)
Depreciation and Amortization by Segment	$ 2,946	$ 2,875	$ 8,733	$ 8,347