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Taxation - Deferred Tax Assets and Liabilities, Others (Details) - EUR (€) € in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Deferred tax assets and liabilities |  |  |
Net deferred tax assets | € 123,024 | € 112,539 | € 66,157
Unrecognized deferred tax assets | 66,364 | 55,282 |
2020 |  |  |
Deferred tax assets and liabilities |  |  |
Net deferred tax assets | € 26,840 | € 27,097 |
Spain |  |  |
Deferred tax assets and liabilities |  |  |
Tax deduction maturity term | 18 years |  |
Tax credit carryforward, exclusively for Spanish companies registered in the Basque Country (in years) | 15 years |  |
United States |  |  |
Deferred tax assets and liabilities |  |  |
Tax credit carryforward (in years) | 20 years |  |

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- Definition The amount of years the tax credits are available that applies exclusively to the Spanish companies registered in the Basque Country. + References No definition available. + Details
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- Definition Refers to the term the tax deduction pending application will reach maturity. + References No definition available. + Details
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- Definition The amount of deferred tax assets net of deferred tax liabilities, when the absolute amount of deferred tax assets is greater than the absolute amount of deferred tax liabilities. [Refer: Deferred tax assets; Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_e&doctype=Standard -URIDate 2019-03-27 + Details
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