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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, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]      
Services and fees $ 153,773 $ 128,090 $ 132,301
Labor cost 481,854 470,928 443,338
Depreciation of property, plant and equipment 18,524 16,968 17,979
Selling, general and administrative expenses, amortization of intangible assets 41,967 206,672 188,550
Depreciation of right-of-use assets 15,564
Commissions, freight and other selling expenses 441,442 491,555 339,759
Provisions for contingencies 28,565 23,498 17,664
Allowances for doubtful accounts (16,256) 1,751 (5,421)
Taxes 110,876 71,110 56,826
Other 89,665 99,404 81,061
Selling, general and administrative expenses including discontinued operations 1,365,974 1,509,976 1,272,057
From discontinued operations (2,041)
Total selling, general and administrative expense $ 1,365,974 $ 1,509,976 $ 1,270,016