Note 13 - Segment Information - Depreciation and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Depreciation and amortization	$ 383,518	$ 361,510	$ 339,613
Corporate and Reconciling Items [Member]
Depreciation and amortization	22,000	18,000	17,000
JBI [Member] | Operating Segments [Member]
Depreciation and amortization	163,000	160,000	148,000
DCS [Member] | Operating Segments [Member]
Depreciation and amortization	158,000	143,000	133,000
JBT [Member] | Operating Segments [Member]
Depreciation and amortization	$ 41,000	$ 41,000	$ 42,000