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Note 1 - Segment Information - Reportable Operating Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement Line Items [Line Items] |  |  |
IFRS - Net Sales | $ 7,294,055 | $ 7,658,588 | $ 5,288,504
IFRS - operating income | 832,391 | 871,813 | 334,588
Financial income (expense), net | 19,283 | 37,300 | (23,017)
Income before equity in earnings of non-consolidated companies and income tax | 851,674 | 909,113 | 311,571
Equity in earnings of non-consolidated companies | 82,036 | 193,994 | 116,140
Income before income tax | 933,710 | 1,103,107 | 427,711
Capital expenditures | 350,174 | 349,473 | 558,236
Depreciation and amortization | 539,521 | 664,357 | 608,640
Discontinued operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
IFRS - Net Sales |  |  | 11,899
Capital expenditures |  |  | 145
Depreciation and amortization |  |  |
Tubes [member] |  |  |
Statement Line Items [Line Items] |  |  |
IFRS - Net Sales | 6,870,000 | 7,233,000 | 4,966,000
Management view - operating income | 857,000 | 702,000 | 115,000
Difference in cost of sales | (105,000) | 112,000 | 164,000
Differences in depreciation and amortization | (1,000) | (34,000) | (3,000)
Differences in selling, general and administrative expenses | (1,000) | (2,000) | 14,000
Differences in other operating income (expenses), net | 6,000 |  | 2,000
IFRS - operating income | 755,000 | 777,000 | 292,000
Financial income (expense), net |  |  |
Income before equity in earnings of non-consolidated companies and income tax |  |  |
Equity in earnings of non-consolidated companies |  |  |
Income before income tax |  |  |
Capital expenditures | 338,000 | 346,000 | 550,000
Depreciation and amortization | 523,000 | 645,000 | 594,000
All other segments [member] |  |  |
Statement Line Items [Line Items] |  |  |
IFRS - Net Sales | 424,000 | 426,000 | 323,000
Management view - operating income | 73,000 | 81,000 | 48,000
Difference in cost of sales | 3,000 | 7,000 | 1,000
Differences in depreciation and amortization | 0 |  |
Differences in selling, general and administrative expenses | 1,000 | 6,000 | (6,000)
Differences in other operating income (expenses), net |  |  |
IFRS - operating income | 77,000 | 95,000 | 43,000
Financial income (expense), net |  |  |
Income before equity in earnings of non-consolidated companies and income tax |  |  |
Equity in earnings of non-consolidated companies |  |  |
Income before income tax |  |  |
Capital expenditures | 12,000 | 3,000 | 8,000
Depreciation and amortization | 17,000 | 19,000 | 15,000
Reportable segments [member] |  |  |
Statement Line Items [Line Items] |  |  |
IFRS - Net Sales | 7,294,000 | 7,659,000 | 5,289,000
Management view - operating income | 929,000 | 783,000 | 163,000
Difference in cost of sales | (102,000) | 119,000 | 165,000
Differences in depreciation and amortization | (1,000) | (34,000) | (3,000)
Differences in selling, general and administrative expenses | 0 | 4,000 | 8,000
Differences in other operating income (expenses), net | 6,000 |  | 2,000
IFRS - operating income | 832,000 | 872,000 | 335,000
Financial income (expense), net | 19,000 | 37,000 | (23,000)
Income before equity in earnings of non-consolidated companies and income tax | 852,000 | 909,000 | 312,000
Equity in earnings of non-consolidated companies | 82,000 | 194,000 | 116,000
Income before income tax | 934,000 | 1,103,000 | 428,000
Capital expenditures | 350,000 | 349,000 | 558,000
Depreciation and amortization | 540,000 | 664,000 | 609,000
Reportable segments [member] | Discontinued operations [member] |  |  |
Statement Line Items [Line Items] |  |  |
IFRS - Net Sales |  |  | 12,000
Management view - operating income |  |  | 3,000
Difference in cost of sales |  |  | (1,000)
Differences in depreciation and amortization |  |  |
Differences in selling, general and administrative expenses |  |  |
Differences in other operating income (expenses), net |  |  |
IFRS - operating income |  |  | 2,000
Financial income (expense), net |  |  |
Income before equity in earnings of non-consolidated companies and income tax |  |  | 2,000
Equity in earnings of non-consolidated companies |  |  |
Income before income tax |  |  | 2,000
Capital expenditures |  |  |
Depreciation and amortization |  |  |

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