Note 10 - Segment Information - Operating Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 2,280,826	$ 2,089,627
Operating Segments [Member]
Revenues	2,286,000	2,093,000
Intersegment Eliminations [Member]
Revenues	(5,000)	(3,000)
JBI [Member] | Operating Segments [Member]
Revenues	1,150,000	1,088,000
DCS [Member] | Operating Segments [Member]
Revenues	542,000	492,000
ICS [Member] | Operating Segments [Member]
Revenues	335,000	301,000
FMS [Member] | Operating Segments [Member]
Revenues	154,000	110,000
JBT [Member] | Operating Segments [Member]
Revenues	$ 105,000	$ 102,000