Note 10 - Business Segments (Details) - Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 3,428,997	$ 3,397,117
Operating Segments [Member] | JBI [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	1,776,000	1,733,000
Operating Segments [Member] | DCS [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	857,000	832,000
Operating Segments [Member] | ICS [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	87,000	106,000
Operating Segments [Member] | JBT [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	311,000	289,000
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 398,000	$ 437,000