Note 10 - Business Segments - Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Operating Segments [Member] | JBI [Member]
Assets	$ 2,010,000	$ 1,848,000
Operating Segments [Member] | DCS [Member]
Assets	956,000	949,000
Operating Segments [Member] | ICS [Member]
Assets	134,000	99,000
Operating Segments [Member] | JBT [Member]
Assets	279,000	286,000
Operating Segments [Member] | Corporate and Other [Member]
Assets	351,000	448,000
Assets	$ 3,729,994	$ 3,629,544