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Employees' Leaving Entitlement - Summary of Changes To Disclosure - Employees' Leaving Entitlement (Detail) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Changes in net defined benefit liability (asset) [abstract]    
Beginning balance € 13,064 € 15,588
Current service cost 91 80
Interest expense 451 151
Benefits paid (1,402) (446)
Actuarial losses/(gains) 185 (2,309)
Ending balance € 12,389 € 13,064