Note 13 - Segment Information - Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets	$ 8,538,260	$ 7,786,582
Operating Segments [Member] | JBI [Member]
Assets	3,391,000	3,270,000
Operating Segments [Member] | DCS [Member]
Assets	2,355,000	1,989,000
Operating Segments [Member] | ICS [Member]
Assets	350,000	311,000
Operating Segments [Member] | FMS [Member]
Assets	634,000	620,000
Operating Segments [Member] | JBT [Member]
Assets	419,000	437,000
Segment Reconciling Items [Member]
Assets	$ 1,389,000	$ 1,160,000