Note 10 - Business Segments - Operating Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Segments [Member] | JBI [Member]
Revenues	$ 970,000	$ 949,000	$ 2,798,000	$ 2,698,000
Operating Segments [Member] | DCS [Member]
Revenues	394,000	370,000	1,135,000	1,082,000
Operating Segments [Member] | ICS [Member]
Revenues	233,000	173,000	620,000	510,000
Operating Segments [Member] | JBT [Member]
Revenues	97,000	98,000	291,000	286,000
Operating Segments [Member]
Revenues	1,694,000	1,590,000	4,844,000	4,576,000
Intersegment Eliminations [Member]
Revenues	(3,000)	(4,000)	(10,000)	(9,000)
Revenues	$ 1,690,659	$ 1,586,494	$ 4,834,397	$ 4,566,631