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Note 19 - Financial Instruments - Financial Assets and Liabilities Carried at Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Contingent consideration liability | $ 50,300 |  |
Interest rate swap asset | 751 |  |
Fair Value, Inputs, Level 1 [Member] |  |  |
Contingent consideration liability |  |  |
Interest rate swap asset |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |
Contingent consideration liability |  |  |
Interest rate swap asset | 751 |  |
Fair Value, Inputs, Level 3 [Member] |  |  |
Contingent consideration liability | 50,300 | $ 32,266 | $ 29,119
Interest rate swap asset |  |  |

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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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