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Property, Plant and Equipment - Summary of Breakdown of Property, Plant and Equipment Based on Cash Generating Units (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 85,306 € 102,523 € 111,086
Italian upholstered furniture plant [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 32,401 35,482  
Romanian upholstered furniture plant [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 20,626 21,372  
Brazilian upholstered furniture plant [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 3,048 4,672  
Chinese upholstered furniture plant [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 2,654 4,257  
Others [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 26,577 € 36,740