OPERATING SEGMENT DATA - Operating Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING INCOME (LOSS)
Operating income	$ 172,619	$ 394,526	$ 276,978
OTHER INCOME (COSTS)
Interest and dividend income	14,728	3,873	1,226
Interest and other related financing costs	(9,094)	(7,726)	(8,914)
Other, net	8,662	(2,370)	3,797
TOTAL OTHER INCOME (COSTS)	14,296	(6,223)	(3,891)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	186,915	388,303	273,087
Operating Segments | Asset Based
OPERATING INCOME (LOSS)
Operating income	253,152	381,133	260,707
Operating Segments | Asset-Light
OPERATING INCOME (LOSS)
Operating income	(12,271)	52,725	46,397
Other and eliminations
OPERATING INCOME (LOSS)
Operating income	$ (68,262)	$ (39,332)	$ (30,126)