Note 9 - Business Segments - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Depreciation and amortization	$ 179,972	$ 157,571	$ 355,784	$ 306,334
Operating Segments [Member] | JBI [Member]
Depreciation and amortization	62,400	55,300	124,100	108,000
Operating Segments [Member] | DCS [Member]
Depreciation and amortization	79,500	68,700	155,700	134,100
Operating Segments [Member] | FMS [Member]
Depreciation and amortization	11,900	11,300	23,900	20,700
Operating Segments [Member] | JBT [Member]
Depreciation and amortization	11,100	8,100	21,900	15,600
Segment Reconciling Items [Member]
Depreciation and amortization	$ 15,100	$ 14,200	$ 30,200	$ 27,900