Note 13 - Business Segments - Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets	$ 7,786,582	$ 6,794,348
Operating Segments [Member] | JBI [Member]
Assets	3,270,000	2,858,000
Operating Segments [Member] | DCS [Member]
Assets	1,910,000	1,630,000
Operating Segments [Member] | ICS [Member]
Assets	322,000	428,000
Operating Segments [Member] | JBT [Member]
Assets	515,000	403,000
Operating Segments [Member] | FMS [Member]
Assets	609,000	472,000
Segment Reconciling Items [Member]
Assets	$ 1,161,000	$ 1,003,000