Post-effective amendment to a registration statement that is not immediately effective upon filing

Breakdown of expenses by nature - Additional Information (Detail)

v3.22.2.2
Breakdown of expenses by nature - Additional Information (Detail)
€ in Thousands
 12 Months Ended
Dec. 31, 2021
EUR (€)
Employees
Dec. 31, 2020
EUR (€)
Employees
Dec. 31, 2019
EUR (€)
Employees
Disclosure Of Expenses By Nature [Line Items]      
Post employment expense benefits defined benefit plans € 5 € 285  
Provision for employee benefits 73 78 € 363
Past service costs defined benefit plans 19 380  
Retirement Indemnity Plan [Member] | First Ten Years [Member]      
Disclosure Of Expenses By Nature [Line Items]      
Other long term benefits € 49 € 48 € 43
Country of domicile [member]      
Disclosure Of Expenses By Nature [Line Items]      
Number of employees | Employees 149 189 273
Country of domicile [member] | NETHERLANDS | Jubilee Plan [Member]      
Disclosure Of Expenses By Nature [Line Items]      
Acturial assumption of discount rates 0.80% 0.30%  
Acturial assumption of expected salary 2.50% 2.50%  
Acturial assumption of retirement age 68 years 67 years  
Provision for employee benefits € 73 € 78  
Past service costs defined benefit plans 19 380  
Past service costs defined benefit plans due to reduction in the number of participants 269    
Past service costs defined benefit plans due to change in the plan 111    
Country of domicile [member] | NETHERLANDS | ABP Defined Contribution Pension Plan [Member]      
Disclosure Of Expenses By Nature [Line Items]      
Defined contribution plans post employment benefits € 1,034 € 1,716 € 1,697
Funding ratio percentage 110.20% 93.50% 97.80%
Policy funding ratio percentage 102.80% 87.60% 95.80%
Policy funding ratio statutory requirement percentage 104.00%    
Policy funding ratio minimum percentage needed 110.00% 126.00% 128.00%
Term for which the recovery plan shall be submitted 10 years 10 years 10 years
Foreign countries [member]      
Disclosure Of Expenses By Nature [Line Items]      
Number of employees | Employees 48 52 63
Foreign countries [member] | BELGIUM | ABP Defined Benefit Pension Plan [Member]      
Disclosure Of Expenses By Nature [Line Items]      
Post employment expense benefits defined benefit plans € 10 € 27 € 27
Foreign countries [member] | Germany United Kingdom Sweden And Norway [Member] | ABP Defined Contribution Pension Plan [Member]      
Disclosure Of Expenses By Nature [Line Items]      
Defined contribution plans post employment benefits € 75 € 124 € 101