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Income and expenses - Impairment Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Impairment losses |  |  |  |  |
Impairment charge related to goodwill |  | $ 30,618 |  | $ 194,612 |
Impairment of intangible assets | $ 16,073 | 443 |  | 230 |
Impairment of property, plant and equipment | 42,846 | (104) |  | 67,624 |
Impairment of non-current financial assets |  |  |  | 5,623 |
Impairment losses | 58,919 | 30,957 | [1] | 268,089 | [1]
Net (loss) gain due to changes in the value of assets |  |  |  |  |
(Increase) decrease in fair value of biological assets | 7,615 | (7,504) |  | (1,891) |
Other (gain) loss | 8 |  |  |  |
Net gains/losses due to changes in the value of assets | 7,623 | (7,504) | [1] | (1,891) | [1]
(Loss) gain on disposal of non-current assets |  |  |  |  |
Loss on disposal of Intangible assets |  | 503 |  |  |
Gain on disposal of Property, plant and equipment | (2,950) | (1,779) |  | (468) |
Loss on disposal of Property, plant and equipment | 162 | 3,733 |  |  |
(Gains) loss on disposal of other non-current assets | (29) | 1,859 |  | 128 |
Gain on disposal of subsidiary | (11,747) |  |  |  |
Total | (14,564) | $ 4,316 | [1] | $ (340) | [1]
Cash proceeds | 20,533 |  |  |  |
Gain on disposal | $ 11,747 |  |  |  |
[1] | The amounts for 2016 have been re-presented to show the results of the Spanish energy business within profit (loss) from continuing operations, as described in Note 1 to the consolidated financial statements.

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- Definition The decrease in intangible assets and goodwill resulting from disposals. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118_e_ii&doctype=Standard -URIDate 2018-03-16 + Details
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