CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement [Abstract]
Operating revenues	$ 771,499	$ 745,701	$ 2,236,761	$ 2,275,579
Operating expenses:
Salaries, wages and benefits	268,720	258,335	762,396	783,492
Fuel	64,059	64,886	187,552	214,506
Supplies and maintenance	65,496	61,548	187,796	185,311
Taxes and licenses	23,189	23,565	68,633	74,223
Insurance and claims	38,060	27,678	75,024	95,937
Depreciation and amortization	72,184	71,584	212,990	218,526
Rent and purchased transportation	243,115	211,667	677,537	626,009
Communications and utilities	3,967	4,186	12,054	13,019
Other	5,730	4,657	5,311	11,762
Total operating expenses	784,520	728,106	2,189,293	2,222,785
Operating income (loss)	(13,021)	17,595	47,468	52,794
Other expense (income):
Interest expense	9,935	11,093	28,825	28,084
Interest income	(1,362)	(1,834)	(4,341)	(5,305)
Loss (gain) on investments in equity securities	(38)	37	(3)	227
Loss (earnings) from equity method investment	289	(295)	(553)	(21)
Other	60	50	(257)	(181)
Total other expense, net	8,884	9,051	23,671	22,804
Income (loss) before income taxes	(21,905)	8,544	23,797	29,990
Income tax expense (benefit)	(822)	2,004	11,479	8,002
Net income (loss)	(21,083)	6,540	12,318	21,988
Net loss attributable to noncontrolling interest	508	25	1,071	354
Net income (loss) attributable to Werner	$ (20,575)	$ 6,565	$ 13,389	$ 22,342
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.34)	$ 0.11	$ 0.22	$ 0.36
Diluted (in dollars per share)	$ (0.34)	$ 0.11	$ 0.22	$ 0.36
Weighted-average common shares outstanding:
Basic (in shares)	59,830	61,808	60,862	62,659
Diluted (in shares)	59,830	62,022	61,015	62,862