Note 13 - Segment Information - Operating Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating income (loss)	$ 993,196	$ 1,331,553	$ 1,045,530
Operating Segments [Member] | JBI [Member]
Operating income (loss)	569,000	800,000	603,000
Operating Segments [Member] | DCS [Member]
Operating income (loss)	405,000	361,000	314,000
Operating Segments [Member] | ICS [Member]
Operating income (loss)	(44,000)	57,000	40,000
Operating Segments [Member] | FMS [Member]
Operating income (loss)	47,000	37,000	34,000
Operating Segments [Member] | JBT [Member]
Operating income (loss)	$ 16,000	$ 77,000	$ 55,000