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Note 20 - Deferred Income Tax - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | $ 406,044 |  | $ 549,619
Translation differences |  | 783 |  | (7,693)
Charged directly to other comprehensive income |  | (1,361) |  | 1,783
Income statement credit (charge) |  | (101,028) |  | (132,969)
Transfer to assets held for sale |  |  |  | (4,696)
At the end of the year |  | 304,438 |  | 406,044
Deferred tax assets, provisions and allowances [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | (33,276) |  | (32,425)
Translation differences |  | (223) |  | (3,123)
Charged directly to other comprehensive income |  |  |  |
Income statement credit (charge) |  | 7,024 |  | 2,272
Transfer to assets held for sale |  |  |  |
At the end of the year |  | (26,475) |  | (33,276)
Deferred tax assets, inventory [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | (94,176) |  | (107,378)
Translation differences |  | (972) |  | (1,347)
Charged directly to other comprehensive income |  |  |  |
Income statement credit (charge) |  | 5,593 |  | 14,274
Transfer to assets held for sale |  |  |  | 275
At the end of the year |  | (89,555) |  | (94,176)
Deferred tax assets, tax loss [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | (199,326) | [1] | (99,394)
Translation differences |  | 322 | [1] | (2,741)
Charged directly to other comprehensive income |  |  | [1] |
Income statement credit (charge) |  | (155,940) | [1] | (97,191)
Transfer to assets held for sale |  |  |  |
At the end of the year | [1] | (354,944) |  | (199,326)
Deferred tax assets, other [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | (81,838) |  | (102,396)
Translation differences |  | (606) |  | 14
Charged directly to other comprehensive income |  | (778) |  | 1,823
Income statement credit (charge) |  | 23,189 |  | 17,968
Transfer to assets held for sale |  |  |  | 753
At the end of the year |  | (60,033) |  | (81,838)
Deferred tax assets [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | (408,616) |  | (341,593)
Translation differences |  | (1,479) |  | (7,197)
Charged directly to other comprehensive income |  | (778) |  | 1,823
Income statement credit (charge) |  | (120,134) |  | (62,677)
Transfer to assets held for sale |  |  |  | 1,028
At the end of the year |  | (531,007) |  | (408,616)
Deferred tax liabilities, fixed assets [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | 263,056 |  | 299,139
Translation differences |  | 2,243 |  | (540)
Charged directly to other comprehensive income |  |  |  |
Income statement credit (charge) |  | 207,605 |  | (29,819)
Transfer to assets held for sale |  |  |  | (5,724)
At the end of the year |  | 472,904 |  | 263,056
Deferred tax liabilities, inventory [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | 36,891 |  | 42,516
Translation differences |  | (2) |  |
Charged directly to other comprehensive income |  |  |  |
Income statement credit (charge) |  | (1,955) |  | (5,625)
Transfer to assets held for sale |  |  |  |
At the end of the year |  | 34,934 |  | 36,891
Deferred tax liabilities, intangible and other assets [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year | [2] | 514,713 |  | 549,557
Translation differences | [2] | 21 |  | 44
Charged directly to other comprehensive income | [2] | (583) |  | (40)
Income statement credit (charge) | [2] | (186,544) |  | (34,848)
Transfer to assets held for sale | [2] |  |  |
At the end of the year | [2] | 327,607 |  | 514,713
Deferred tab liabilities [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
At the beginning of the year |  | 814,660 |  | 891,212
Translation differences |  | 2,262 |  | (496)
Charged directly to other comprehensive income |  | (583) |  | (40)
Income statement credit (charge) |  | 19,106 |  | (70,292)
Transfer to assets held for sale |  |  |  | (5,724)
At the end of the year |  | $ 835,445 |  | $ 814,660
[1] | As of December 31, 2017, the net unrecognized deferred tax assets amount to $98.8 million.
[2] | Includes the effect of currency translation on tax base (see Note 8).

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