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Explanation of the Effects of Transition to International Financial Reporting Standards - Summary of Impact of IFRS Adjustments on Exchange Rate Differences on Translation of Foreign Operations (Detail) € in Thousands	12 Months Ended
	Dec. 31, 2017 EUR (€)
Disclosure of impact of IFRS adjustments on exchange rate differences on translation of foreign operations [abstract]
Beginning balance	€ (11,419)
Functional currency adjustment	3,641
Ending balance	€ (7,778)

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- Definition

Disclosure of impact of IFRS adjustments on exchange rate differences on translation of foreign operations [abstract]

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Exchange rate differences on translation of foreign operations.

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Functional currency adjustment.

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