Note 12 - Business Segments - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating income	$ 353,083	$ 241,546	$ 687,377	$ 449,198
Segment Reconciling Items [Member]
Operating income	(0)	(100)	(200)	(200)
JBI [Member] | Operating Segments [Member]
Operating income	202,500	134,600	403,500	242,100
DCS [Member] | Operating Segments [Member]
Operating income	89,200	79,000	166,300	153,300
ICS [Member] | Operating Segments [Member]
Operating income	23,600	3,100	48,600	10,400
JBT [Member] | Operating Segments [Member]
Operating income	25,000	14,200	56,500	24,400
FMS [Member] | Operating Segments [Member]
Operating income	$ 12,800	$ 10,700	$ 12,700	$ 19,200