OPERATING SEGMENT DATA - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	$ 48,845	$ 42,116	$ 71,280	$ 63,275
OTHER INCOME (COSTS) FROM CONTINUING OPERATIONS
Interest and dividend income	3,241	3,725	6,556	6,658
Interest and other related financing costs	(2,078)	(2,205)	(4,306)	(4,532)
Other, net	(781)	5,038	(28,980)	6,818
TOTAL OTHER INCOME (COSTS)	382	6,558	(26,730)	8,944
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	49,227	48,674	44,550	72,219
Change in fair value included in other income, increase		3,700		3,739
Operating Segments | Asset Based
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	72,792	43,325	126,248	90,796
Operating Segments | Asset-Light
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	(9,498)	13,180	(24,756)	(911)
Other and eliminations
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	$ (14,449)	$ (14,389)	$ (30,212)	$ (26,610)