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Note 12 - Acquisitions - Revenue and Operating Income from Acquisitions (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Acquisitions 2016 [Member] |  |  |  |
Revenue |  |  | $ 82,730 |
Operating income |  |  | 993 |
Revenue | $ 2,269,967 | $ 2,084,845 | 6,386,167 | $ 5,870,970
Operating income | $ 93,423 | $ 72,797 | $ 256,847 | $ 226,320

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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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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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