Note 10 - Business Segments (Details) - Assets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 3,485,350	$ 3,397,117
JBI [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,872,000	1,733,000
DCS [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	888,000	832,000
ICS [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	83,000	106,000
JBT [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	316,000	289,000
Corporate and Other [Member] | Operating Segments [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 326,000	$ 437,000