OPERATING SEGMENT DATA - Revenue from Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
REVENUES
Revenues	$ 4,179,019	$ 4,427,443	$ 5,029,008
Asset-Based
REVENUES
Revenues	2,626,408	2,749,803	2,896,284
Asset-Light
REVENUES
Revenues	1,547,627	1,673,399	2,128,394
Corporate and other
REVENUES
Revenues	4,984	4,241	4,330
Operating Segments | Asset-Based
REVENUES
Revenues	2,750,134	2,871,004	3,010,900
Operating Segments | Asset-Light
REVENUES
Revenues	1,552,936	1,680,645	2,139,272
Intersegment revenues
REVENUES
Revenues	(129,035)	(128,447)	(125,494)
Intersegment revenues | Asset-Based
REVENUES
Revenues	123,726	121,201	114,616
Intersegment revenues | Asset-Light
REVENUES
Revenues	5,309	7,246	10,878
Other and eliminations
REVENUES
Revenues	$ (124,051)	$ (124,206)	$ (121,164)