Financial Risk Management Objectives and Policies - Summary of Liquidity Risk (Detail) - Liquidity risk [Member] - EUR (€) € in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Statements [Line Items] | ||
| Financial assets held for managing liquidity risk | € 469,337 | € 604,452 |
| Cash and cash equivalents [Member] | ||
| Statements [Line Items] | ||
| Financial assets held for managing liquidity risk | 345,918 | 236,748 |
| Short-Term Deposits [Member] | ||
| Statements [Line Items] | ||
| Financial assets held for managing liquidity risk | € 123,419 | € 367,704 |