GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2024
Increase (Decrease) in Goodwill [Roll Forward]
Beginning balance	$ 132,717
Purchase accounting adjustments	(3,613)
Ending balance	129,104
Goodwill	129,104	$ 129,104
TTS
Increase (Decrease) in Goodwill [Roll Forward]
Beginning balance	53,897
Purchase accounting adjustments	(7,841)
Ending balance	46,056
Goodwill	46,056	46,056
Werner Logistics
Increase (Decrease) in Goodwill [Roll Forward]
Beginning balance	78,820
Purchase accounting adjustments	4,228
Ending balance	83,048
Goodwill	$ 83,048	$ 83,048