Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Revenues from external customers	$ 693,370	$ 749,537
Total revenues	712,114	769,080
Operating expenses:
Salaries, wages and benefits	243,225	265,403
Fuel	63,092	77,622
Supplies and maintenance	60,040	61,775
Taxes and licenses	22,344	25,164
Insurance and claims	43,777	36,362
Depreciation and amortization	70,049	74,270
Rent and purchased transportation	206,142	203,925
Communications and utilities	4,357	4,706
Gains on sales of property and equipment	(2,843)	(3,568)
Other	4,920	4,265
Total operating expenses	717,946	753,492
Operating income (loss)	(5,832)	15,588
Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues from external customers	(4,063)	(4,071)
Total revenues	(4,063)	(4,071)
Reportable segment revenues
Segment Reporting Information [Line Items]
Revenues from external customers	697,433	753,608
Operating expenses:
Salaries, wages and benefits	235,959	257,841
Fuel	62,793	77,312
Supplies and maintenance	54,011	56,014
Taxes and licenses	22,180	25,016
Insurance and claims	43,696	36,263
Depreciation and amortization	66,738	70,600
Rent and purchased transportation	207,672	206,661
Communications and utilities	3,965	4,401
Gains on sales of property and equipment	(3,587)	(4,684)
Other	5,397	5,673
Total operating expenses	698,824	735,097
Operating income (loss)	(1,391)	18,511
Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	18,744	19,543
Other operating segments
Operating expenses:
Operating income (loss)	(4,441)	(2,923)
Truckload Transportation Services
Segment Reporting Information [Line Items]
Revenues from external customers	497,812	547,055
Truckload Transportation Services | Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues from external customers	(4,063)	(4,071)
Truckload Transportation Services | Reportable segment revenues
Segment Reporting Information [Line Items]
Revenues from external customers	501,875	551,126
Total revenues	501,875	551,126
Operating expenses:
Salaries, wages and benefits	217,703	236,531
Fuel	62,433	76,874
Supplies and maintenance	51,338	54,130
Taxes and licenses	21,957	24,776
Insurance and claims	43,074	35,034
Depreciation and amortization	63,046	66,933
Rent and purchased transportation	38,453	32,495
Communications and utilities	3,608	3,634
Gains on sales of property and equipment	(3,288)	(4,465)
Other	4,467	4,344
Total operating expenses	502,791	530,286
Operating income (loss)	(916)	20,840
Werner Logistics
Segment Reporting Information [Line Items]
Revenues from external customers	195,558	202,482
Werner Logistics | Inter-segment eliminations
Segment Reporting Information [Line Items]
Revenues from external customers	0	0
Werner Logistics | Reportable segment revenues
Segment Reporting Information [Line Items]
Revenues from external customers	195,558	202,482
Total revenues	195,558	202,482
Operating expenses:
Salaries, wages and benefits	18,256	21,310
Fuel	360	438
Supplies and maintenance	2,673	1,884
Taxes and licenses	223	240
Insurance and claims	622	1,229
Depreciation and amortization	3,692	3,667
Rent and purchased transportation	169,219	174,166
Communications and utilities	357	767
Gains on sales of property and equipment	(299)	(219)
Other	930	1,329
Total operating expenses	196,033	204,811
Operating income (loss)	$ (475)	$ (2,329)