Note 9 - Business Segments - Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues	$ 2,928,685	$ 3,132,623	$ 5,872,685	$ 6,362,212
Operating Segments [Member]
Revenues	2,932,000	3,137,000	5,881,000	6,371,000
Operating Segments [Member] | JBI [Member]
Revenues	1,408,000	1,489,000	2,803,000	3,029,000
Operating Segments [Member] | DCS [Member]
Revenues	851,000	888,000	1,711,000	1,767,000
Operating Segments [Member] | ICS [Member]
Revenues	270,000	344,000	556,000	728,000
Operating Segments [Member] | FMS [Member]
Revenues	235,000	224,000	465,000	449,000
Operating Segments [Member] | JBT [Member]
Revenues	168,000	192,000	346,000	398,000
Intersegment Eliminations [Member]
Revenues	$ (3,000)	$ (4,000)	$ (8,000)	$ (9,000)