Note 10 - Business Segments (Details) - Operating Revenues - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 1,539,957	$ 1,547,867	$ 2,980,137	$ 2,954,774
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	1,543,000	1,553,000	2,986,000	2,965,000
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	(3,000)	(5,000)	(6,000)	(10,000)
JBI [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	905,000	931,000	1,749,000	1,766,000
DCS [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	367,000	348,000	712,000	670,000
ICS [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	174,000	173,000	337,000	336,000
JBT [Member] | Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 97,000	$ 101,000	$ 188,000	$ 193,000