Note 10 - Segment Information - Operating Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating income	$ 154,741	$ 167,795
JBI [Member] | Operating Segments [Member]
Operating income	102,200	103,300
DCS [Member] | Operating Segments [Member]
Operating income	72,900	50,100
ICS [Member] | Operating Segments [Member]
Operating income	(18,900)	7,000
FMS [Member] | Operating Segments [Member]
Operating income	(3,300)	200
JBT [Member] | Operating Segments [Member]
Operating income	$ 1,800	$ 7,200