Note 9 - Business Segments - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating income	$ 277,489	$ 334,294
Operating Segments [Member] | JBI [Member]
Operating income	168,700	201,000
Operating Segments [Member] | DCS [Member]
Operating income	102,600	79,700
Operating Segments [Member] | ICS [Member]
Operating income	(5,400)	24,200
Operating Segments [Member] | FMS [Member]
Operating income	6,600	600
Operating Segments [Member] | JBT [Member]
Operating income	5,000	28,900
Segment Reconciling Items [Member]
Operating income	$ 0	$ (100)