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Note 2 - Cost of Sales (Tables) | 12 Months Ended
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Dec. 31, 2017
Statement Line Items [Line Items] |
Disclosure of detailed information about cost of sales [text block] |
|  | Year ended December 31, |
(all amounts in thousands of U.S. dollars) |  | 2017 |  |  | 2016 |  |  | 2015 |
Inventories at the beginning of the year |  |  | 1,563,889 |  |  |  | 1,843,467 |  |  |  | 2,779,869 |
Plus: Charges of the year |  |  |  |  |  |  |  |  |  |  |  |
Raw materials, energy, consumables and other |  |  | 2,794,503 |  |  |  | 1,528,532 |  |  |  | 1,934,209 |
Services and fees |  |  | 244,035 |  |  |  | 199,210 |  |  |  | 298,470 |
Labor cost |  |  | 778,408 |  |  |  | 658,975 |  |  |  | 947,997 |
Depreciation of property, plant and equipment |  |  | 383,490 |  |  |  | 376,965 |  |  |  | 377,596 |
Amortization of intangible assets |  |  | 18,621 |  |  |  | 27,244 |  |  |  | 24,100 |
Maintenance expenses |  |  | 183,370 |  |  |  | 122,553 |  |  |  | 184,053 |
Allowance for obsolescence |  |  | (12,917 | ) |  |  | 32,765 |  |  |  | 68,669 |
Taxes |  |  | 18,542 |  |  |  | 16,693 |  |  |  | 21,523 |
Other |  |  | 88,823 |  |  |  | 89,575 |  |  |  | 92,059 |
|  |  | 4,496,875 |  |  |  | 3,052,512 |  |  |  | 3,948,676 |
Less: Inventories at the end of the year (*) |  |  | (2,368,304 | ) |  |  | (1,593,708 | ) |  |  | (1,843,467 | )
From discontinued operations |  |  | (7,403 | ) |  |  | (136,587 | ) |  |  | (137,318 | )
|  |  | 3,685,057 |  |  |  | 3,165,684 |  |  |  | 4,747,760 |

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