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Provisions (Non-Current and Current) - Disclosure of Provision Related to Investment (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of other provisions [line items]      
Total provisions € 18,019 € 17,455 € 18,978
Less current portion (3,745) (4,489)  
Non-current portion 14,274 12,966  
Provision for legal claims [member]      
Disclosure of other provisions [line items]      
Total provisions 12,865 10,469 10,926
Provision for tax claims [member]      
Disclosure of other provisions [line items]      
Total provisions 360 641 1,098
Provision for warranties [member]      
Disclosure of other provisions [line items]      
Total provisions 3,745 4,489 4,476
Termination indemnities for sales agents [member]      
Disclosure of other provisions [line items]      
Total provisions € 1,049 1,197 1,141
Other provisions [member]      
Disclosure of other provisions [line items]      
Total provisions   € 659 € 1,337