Note 11 - Business Segments - Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Depreciation and amortization	$ 93,050	$ 90,364	$ 185,238	$ 178,716
JBI [Member] | Operating Segments [Member]
Depreciation and amortization	40,400	40,000	80,800	79,000
DCS [Member] | Operating Segments [Member]
Depreciation and amortization	37,200	35,800	73,600	70,600
ICS [Member] | Operating Segments [Member]
Depreciation and amortization	300	100	600	200
JBT [Member] | Operating Segments [Member]
Depreciation and amortization	10,300	10,100	20,500	20,200
Corporate and Other [Member] | Operating Segments [Member]
Depreciation and amortization	$ 4,900	$ 4,400	$ 9,700	$ 8,700