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Note 3 - Selling, General and Administrative Expenses - Components of Selling, General and Administrative Expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement Line Items [Line Items]      
Services and fees $ 128,090 $ 132,301 $ 123,653
Labor cost 470,928 443,338 441,355
Depreciation of property, plant and equipment 16,968 17,979 16,965
Selling, general and administrative expenses, amortization of intangible assets 206,672 188,550 241,238
Commissions, freight and other selling expenses 491,555 339,759 243,401
Provisions for contingencies 23,498 17,664 30,841
Allowances for doubtful accounts 1,751 (5,421) (12,573)
Taxes 71,110 56,826 67,724
Other 99,404 81,061 76,563
1,509,976 1,272,057 1,229,167
From discontinued operations (2,041) (32,238)
$ 1,509,976 $ 1,270,016 $ 1,196,929