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Provisions (Non-Current and Current) - Disclosure of Changes in Provision Related to Investment (Detail) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of other provisions [line items] |  |
Beginning Balance | € 22,672 | € 18,940
Increase | 4,374 | 12,813
Reductions | (8,068) | (9,081)
Ending Balance | 18,978 | 22,672
Provision for legal claims [member] |  |
Disclosure of other provisions [line items] |  |
Beginning Balance | 13,008 | 8,062
Increase | 1,225 | 9,980
Reductions | (3,307) | (5,034)
Ending Balance | 10,926 | 13,008
Provision for tax claims [member] |  |
Disclosure of other provisions [line items] |  |
Beginning Balance | 1,912 | 3,123
Reductions | (814) | (1,211)
Ending Balance | 1,098 | 1,912
Provision for warranties [member] |  |
Disclosure of other provisions [line items] |  |
Beginning Balance | 5,957 | 5,687
Increase | 1,180 | 2,630
Reductions | (2,661) | (2,360)
Ending Balance | 4,476 | 5,957
Termination indemnities for sales agents [member] |  |
Disclosure of other provisions [line items] |  |
Beginning Balance | 1,196 | 1,132
Increase | 177 | 203
Reductions | (232) | (139)
Ending Balance | 1,141 | 1,196
Other provisions [member] |  |
Disclosure of other provisions [line items] |  |
Beginning Balance | 599 | 936
Increase | 1,792 |
Reductions | (1,054) | (337)
Ending Balance | € 1,337 | € 599

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