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Note 14 - Segment Information - Operating Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating income | $ 205,074 | $ 167,862 | $ 193,093 | $ 167,795 | $ 122,740 | $ 174,688 | $ 214,812 | $ 168,781 | $ 733,825 | $ 681,021 | $ 623,789
JBI [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 447,000 | 401,000 | 407,000
DCS [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 269,000 | 193,000 | 171,000
ICS [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | (11,000) | 50,000 | 23,000
JBT [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | $ 29,000 | $ 37,000 | $ 23,000

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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
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