Note 12 - Business Segments - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Depreciation and amortization	$ 95,959	$ 91,001	$ 281,198	$ 269,717
JBI [Member] | Operating Segments [Member]
Depreciation and amortization	40,400	40,300	121,200	119,400
DCS [Member] | Operating Segments [Member]
Depreciation and amortization	40,400	35,800	114,100	106,300
ICS [Member] | Operating Segments [Member]
Depreciation and amortization	300	100	900	300
JBT [Member] | Operating Segments [Member]
Depreciation and amortization	10,200	10,100	30,700	30,400
Corporate and Other [Member] | Operating Segments [Member]
Depreciation and amortization	$ 4,700	$ 4,700	$ 14,300	$ 13,300