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Trade Payables - Additional Information (Detail) - EUR (€) € in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
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Disclosure of trade payables [line items] |  |  |
Trade payables | € 77,901 | € 76,035 | € 70,457
Trade payables due to related parties | 1,004 | 8 | 0
Currency denominated, foreign currency [member] |  |  |
Disclosure of trade payables [line items] |  |  |
Trade payables | € 27,443 | € 21,197 | € 22,151

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- Definition The amount of current trade payables and current other payables. [Refer: Current trade payables; Other current payables] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph k -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_k&doctype=Standard -URIDate 2018-03-16 + Details
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Period Type: | instant

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- Definition The amount of payables due to related parties. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78&doctype=Standard -URIDate 2018-03-16 + Details
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Period Type: | instant

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- Definition Line items represents information of trade payables. + References No definition available. + Details
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- Details
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Period Type: |