Annual and transition report of foreign private issuers [Sections 13 or 15(d)]

Breakdown of expenses by nature - Additional Information (Detail)

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Breakdown of expenses by nature - Additional Information (Detail)
€ in Thousands
 12 Months Ended
Dec. 31, 2024
EUR (€)
employee
Dec. 31, 2023
EUR (€)
employee
Dec. 31, 2022
EUR (€)
employee
Country of domicile      
Disclosure Of Expenses By Nature [Line Items]      
Number of employees | employee 267 218 163
Country of domicile | The Netherlands | Jubilee Plan      
Disclosure Of Expenses By Nature [Line Items]      
Post-employment benefit expense in profit or loss, defined benefit plans € 3 € 9  
Actuarial assumption of discount rates 3.30% 3.30%  
Salary increases 2.50% 2.50%  
Actuarial assumption of retirement age 68 years 68 years  
Provisions for employee benefits € 38 € 35 € 26
Country of domicile | ABP Defined Contribution Pension Plan | The Netherlands      
Disclosure Of Expenses By Nature [Line Items]      
Post-employment benefit expense, defined contribution plans € 1,227 € 1,142 € 1,290
Funding ratio percentage 110.50% 110.50% 110.90%
Policy funding ratio percentage 113.90% 113.90% 118.60%
Policy funding ratio statutory requirement percentage 104.00%    
Foreign countries      
Disclosure Of Expenses By Nature [Line Items]      
Number of employees | employee 132 94 59
Foreign countries | Belgium | ABP Defined Benefit Pension Plan      
Disclosure Of Expenses By Nature [Line Items]      
Post-employment benefit expense in profit or loss, defined benefit plans € 0 € 1 € 0
Foreign countries | ABP Defined Contribution Pension Plan | Germany United Kingdom Sweden And Norway      
Disclosure Of Expenses By Nature [Line Items]      
Post-employment benefit expense, defined contribution plans € 111 € 79 € 67