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Employee Benefits - Schedule Of Changes In Long Term Employee Benefits (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Detailed Information About Employee Benefits [Line Items]    
Beginning balance € 18,464 € 19,085
Business combination   962
Current service costs 1,154 1,439
Interest expenses 189 123
Actuarial gains/losses in other comprehensive loss (2,184) 480
Actuarial gains in profit or loss (152) (184)
Benefits paid (2,007) (3,367)
Contributions (347) (100)
Exchange differences 11 26
Ending balance 15,128 18,464
Defined benefit plans    
Disclosure Of Detailed Information About Employee Benefits [Line Items]    
Beginning balance 16,016  
Ending balance 12,543 16,016
Other Long Term Employee Benefits Defined Benefits Plan    
Disclosure Of Detailed Information About Employee Benefits [Line Items]    
Beginning balance 2,448 2,038
Current service costs 546 747
Interest expenses 19 10
Actuarial gains/losses in other comprehensive loss (69)  
Actuarial gains in profit or loss (152) (184)
Benefits paid (137) (169)
Contributions (70)  
Exchange differences   6
Ending balance 2,585 2,448
ITALY | Defined benefit plans    
Disclosure Of Detailed Information About Employee Benefits [Line Items]    
Beginning balance 2,997 2,492
Business combination   962
Current service costs 61 83
Interest expenses 33 6
Actuarial gains/losses in other comprehensive loss (425) 360
Benefits paid (305) (909)
Exchange differences   3
Ending balance 2,361 2,997
AUSTRIA    
Disclosure Of Detailed Information About Employee Benefits [Line Items]    
Beginning balance 13,019  
Ending balance 10,182 13,019
AUSTRIA | Defined benefit plans    
Disclosure Of Detailed Information About Employee Benefits [Line Items]    
Beginning balance 13,019 14,555
Current service costs 547 609
Interest expenses 137 107
Actuarial gains/losses in other comprehensive loss (1,690) 120
Benefits paid (1,565) (2,289)
Contributions (277) (100)
Exchange differences 11 17
Ending balance € 10,182 € 13,019