Note 9 - Business Segments - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Assets	$ 8,255,673	$ 8,312,270
Operating Segments [Member]
Assets	6,897,000	6,923,000
Operating Segments [Member] | JBI [Member]
Assets	3,499,000	3,507,000
Operating Segments [Member] | DCS [Member]
Assets	2,234,000	2,195,000
Operating Segments [Member] | ICS [Member]
Assets	272,000	288,000
Operating Segments [Member] | FMS [Member]
Assets	521,000	544,000
Operating Segments [Member] | JBT [Member]
Assets	371,000	389,000
Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Assets	$ 1,359,000	$ 1,389,000