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INVESTMENTS IN NON-CONSOLIDATED COMPANIES (Summarized income statement information) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of unconsolidated structured entities [line items] |  |  |
Net sales | $ 11,454,807 | $ 9,700,296 | $ 7,223,975
Cost of sales | (8,483,328) | (7,403,025) | (5,384,390)
Gross profit | 2,971,479 | 2,297,271 | 1,839,585
Selling, general and administrative expenses | (876,764) | (824,247) | (687,942)
Other operating income (expenses), net | 13,656 | (16,240) | (9,925)
Profit (loss) from operating activities | 2,108,371 | 1,456,784 | 1,141,718
Financial expenses, net | (131,172) | (114,583) | (89,971)
Profit before income tax expense | 2,031,567 | 1,359,809 | 1,118,457
Income tax expense | (369,435) | (336,882) | (411,528)
Net profit (loss) before non-controlling interest | 1,662,132 | 1,022,927 | 706,929
Non-controlling interest in other subsidiaries | (155,485) | (136,708) | (111,285)
Net profit (loss) for the year | 1,506,647 | 886,219 | $ 595,644
USINAS SIDEÚRGICAS DE MINAS GERAIS S.A. |  |  |
Disclosure of unconsolidated structured entities [line items] |  |  |
Net sales | 3,766,000 | 3,368,000 |
Cost of sales | (3,154,000) | (2,854,000) |
Gross profit | 612,000 | 514,000 |
Selling, general and administrative expenses | (213,000) | (206,000) |
Other operating income (expenses), net | (153,000) | (78,000) |
Profit (loss) from operating activities | 246,000 | 230,000 |
Financial expenses, net | 15,000 | (145,000) |
Equity in earnings of associated companies | 70,000 | 49,000 |
Profit before income tax expense | 331,000 | 134,000 |
Income tax expense | (110,000) | (34,000) |
Net profit (loss) before non-controlling interest | 221,000 | 100,000 |
Non-controlling interest in other subsidiaries | (28,000) | (26,000) |
Net profit (loss) for the year | $ 193,000 | $ 74,000 |

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- Definition The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_99&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_103&doctype=Standard -URIDate 2017-03-09 + Details
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