v3.26.1
Share-Based Compensation Plans - Summary of Average Value of Inputs to the Model (Detail) - Equity Based Compensation Plan [Member]
€ / shares in Units, € in Thousands
12 Months Ended
Dec. 31, 2025
EUR (€)
yr
€ / shares
Dec. 31, 2024
EUR (€)
yr
€ / shares
Disclosure Of Indirect Measurement Of Fair Value Of Goods Or Services Received Share Options Granted During Period [Line Items]    
Dividend yield   11.04%
Risk-free interest rate   2.80%
Expected life of options | yr   3
Share price at inception | € / shares   € 5.26
Top of range [member]    
Disclosure Of Indirect Measurement Of Fair Value Of Goods Or Services Received Share Options Granted During Period [Line Items]    
Dividend yield 8.50%  
Risk-free interest rate 1.96%  
Expected life of options | yr 2.61  
Share price at inception | € / shares € 3.16  
Fair value per option/share € 1,520 € 4,230
Total expected cost for each plan € 280 4,950
Bottom of range [member]    
Disclosure Of Indirect Measurement Of Fair Value Of Goods Or Services Received Share Options Granted During Period [Line Items]    
Dividend yield 22.02%  
Risk-free interest rate 2.21%  
Expected life of options | yr 3.33  
Share price at inception | € / shares € 6.6  
Fair value per option/share € 7,940 3,830
Total expected cost for each plan € 2,010 € 1,870