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FOREIGN CURRENCY AND EXCHANGE RATE DIFFERENCES (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | $ 606,673 | $ 260,092
Other financial assets, current | 57,132 | 36,484
Other non-financial assets, current | 106,952 | 107,170
Trade and other accounts receivable, current | 518,006 | 373,447
Accounts receivable from related entities, current | 593 | 958
Tax current assets | 20,774 | 33,575
Total current assets | 1,310,130 | 811,726
Other financial assets, non-current | 21,850 | 20,975
Other non-financial assets, non-current | 31,126 | 9,108
Accounts receivable, non-current | 5,378 | 6,887
Deferred tax assets | 2,073 | 2,081
Total non-current assets | 60,427 | 39,051
Argentina, Pesos |  |
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | 4,236 | 7,309
Other financial assets, current | 11 | 21
Other non-financial assets, current | 13,077 | 16,507
Trade and other accounts receivable, current | 54,053 | 49,680
Tax current assets | 812 | 1,679
Total current assets | 72,189 | 75,196
Other non-financial assets, non-current | 86 | 172
Total non-current assets | 86 | 172
Brazil, Brazil Real |  |
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | 34,360 | 14,242
Other financial assets, current | 25,829 | 17
Other non-financial assets, current | 37,794 | 19,686
Trade and other accounts receivable, current | 6,037 | 22,006
Tax current assets | 1,106 | 3,934
Total current assets | 105,126 | 59,885
Other financial assets, non-current | 4,941 | 3,831
Other non-financial assets, non-current | 7,465 | 6,368
Total non-current assets | 12,406 | 10,199
Chile, Pesos |  |
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | 415,399 | 81,693
Other financial assets, current | 25,904 | 26,605
Other non-financial assets, current | 30,916 | 34,258
Trade and other accounts receivable, current | 112,133 | 82,369
Accounts receivable from related entities, current | 200 | 735
Tax current assets | 4,860 | 3,317
Total current assets | 589,412 | 228,977
Other financial assets, non-current | 68 | 74
Accounts receivable, non-current | 5,378 | 6,887
Total non-current assets | 5,446 | 6,961
Colombia, Pesos |  |
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | 2,732 | 1,105
Other financial assets, current | 139 | 150
Other non-financial assets, current | 434 | 340
Trade and other accounts receivable, current | 5,065 | 1,169
Tax current assets | 5 | 660
Total current assets | 8,375 | 3,424
Other financial assets, non-current | 145 | 281
Deferred tax assets | 78 | 86
Total non-current assets | 223 | 367
Euro Member Countries, Euro |  |
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | 20,339 | 11,746
Other non-financial assets, current | 3,935 | 2,722
Trade and other accounts receivable, current | 49,044 | 48,286
Tax current assets |  | 179
Total current assets | 73,318 | 62,933
Other financial assets, non-current | 7,438 | 7,853
Total non-current assets | 7,438 | 7,853
United States of America, Dollars |  |
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | 51,382 | 108,327
Other financial assets, current | 4,923 | 9,343
Other non-financial assets, current | 8,949 | 21,907
Trade and other accounts receivable, current | 2,938 | 34,268
Accounts receivable from related entities, current | 393 | 223
Tax current assets | 429 | 327
Total current assets | 69,014 | 174,395
Other financial assets, non-current | 7,441 | 7,273
Other non-financial assets, non-current | 3 | 38
Total non-current assets | 7,444 | 7,311
Peru, Nuevos Soles |  |
Disclosure of subsidiaries [line items] |  |
Tax current assets | 13,306 | 21,948
Other currency |  |
Disclosure of subsidiaries [line items] |  |
Cash and cash equivalents | 78,225 | 35,670
Other financial assets, current | 326 | 348
Other non-financial assets, current | 11,847 | 11,750
Trade and other accounts receivable, current | 288,736 | 135,669
Tax current assets | 256 | 1,531
Total current assets | 392,696 | 206,916
Other financial assets, non-current | 1,817 | 1,663
Other non-financial assets, non-current | 23,572 | 2,530
Deferred tax assets | 1,995 | 1,995
Total non-current assets | $ 27,384 | $ 6,188

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