OPERATING SEGMENT DATA - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
REVENUES
Revenues	$ 1,077,831	$ 1,103,464	$ 2,114,250	$ 2,209,558
Asset Based
REVENUES
Revenues	682,558	694,755	1,323,134	1,363,975
Asset-Light
REVENUES
Revenues	394,377	407,926	789,202	843,959
Operating Segments | Asset Based
REVENUES
Revenues	712,725	722,015	1,384,192	1,419,832
Operating Segments | Asset-Light
REVENUES
Revenues	395,817	409,816	792,180	847,908
Other and eliminations
REVENUES
Revenues	$ (30,711)	$ (28,367)	$ (62,122)	$ (58,182)