Note 13 - Business Segments - Operating Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues	$ 2,261,647	$ 2,139,027	$ 4,351,274	$ 4,087,272
Operating Segments [Member]
Revenues	2,264,000	2,143,000	4,356,000	4,096,000
Intersegment Eliminations [Member]
Revenues	(2,000)	(4,000)	(5,000)	(9,000)
JBI [Member] | Operating Segments [Member]
Revenues	1,150,000	1,165,000	2,238,000	2,235,000
DCS [Member] | Operating Segments [Member]
Revenues	680,000	530,000	1,282,000	1,024,000
ICS [Member] | Operating Segments [Member]
Revenues	334,000	347,000	635,000	643,000
JBT [Member] | Operating Segments [Member]
Revenues	$ 100,000	$ 101,000	$ 201,000	$ 194,000