Note 10 - Business Segments - Operating Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues	$ 2,618,149	$ 2,280,826
Operating Segments [Member]
Revenues	2,634,000	2,286,000
Intersegment Eliminations [Member]
Revenues	(16,000)	(5,000)
JBI [Member] | Operating Segments [Member]
Revenues	1,177,000	1,150,000
DCS [Member] | Operating Segments [Member]
Revenues	580,000	542,000
ICS [Member] | Operating Segments [Member]
Revenues	525,000	335,000
FMS [Member] | Operating Segments [Member]
Revenues	202,000	154,000
JBT [Member] | Operating Segments [Member]
Revenues	$ 150,000	$ 105,000