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OPERATING SEGMENT DATA - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	$ 134,993	$ 45,091		$ 206,273	$ 108,366
OTHER INCOME (COSTS) FROM CONTINUING OPERATIONS
Interest and dividend income	3,130	3,946		9,686	10,604
Interest and other related financing costs	(2,281)	(2,236)		(6,587)	(6,768)
Other, net	862	89		(28,118)	6,907
TOTAL OTHER INCOME (COSTS)	1,711	1,799		(25,019)	10,743
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	136,704	46,890		181,254	119,109
Change in fair value included in other income, increase			$ 3,700		3,739
Lease impairment charges		30,162			30,162
Operating Segments | Asset Based
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	64,020	74,823		190,268	165,619
OTHER INCOME (COSTS) FROM CONTINUING OPERATIONS
Lease impairment charges		700			700
Operating Segments | Asset-Light
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	84,779	(3,704)		60,023	(4,615)
OTHER INCOME (COSTS) FROM CONTINUING OPERATIONS
Lease impairment charges		14,407			14,407
Other and eliminations
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS
Operating income	$ (13,806)	(26,028)		$ (44,018)	(52,638)
OTHER INCOME (COSTS) FROM CONTINUING OPERATIONS
Lease impairment charges		$ 15,100			$ 15,100

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