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Qualitative and quantitative information on financial risks - Summary of Groups Financial Liabilities into Relevant Maturity Groupings (Detail) - EUR (€) € in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Disclosure of financial liabilities [line items] |  |
Financial liabilities | € 1,414,231 | € 1,506,609
Derivative financial instruments |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 4,576 | 15,138
Trade payables and customer advances |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 326,245 | 309,771
Liquidity risk |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 1,414,231 | 1,506,609
Total contractual cash flows | 1,529,485 | 1,610,075
Liquidity risk | Within 1 year |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 586,943 | 676,095
Liquidity risk | Between 1 and 2 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 246,091 | 221,342
Liquidity risk | Between 2 and 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 183,194 | 216,335
Liquidity risk | Beyond 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 513,257 | 496,303
Liquidity risk | Derivative financial instruments |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 4,576 | 15,138
Total contractual cash flows | 4,576 | 15,138
Liquidity risk | Derivative financial instruments | Within 1 year |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 4,315 | 14,699
Liquidity risk | Derivative financial instruments | Between 1 and 2 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 261 | 0
Liquidity risk | Derivative financial instruments | Between 2 and 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 439
Liquidity risk | Derivative financial instruments | Beyond 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Liquidity risk | Trade payables and customer advances |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 326,245 | 309,771
Total contractual cash flows | 326,245 | 309,771
Liquidity risk | Trade payables and customer advances | Within 1 year |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 326,245 | 309,771
Liquidity risk | Trade payables and customer advances | Between 1 and 2 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Liquidity risk | Trade payables and customer advances | Between 2 and 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Liquidity risk | Trade payables and customer advances | Beyond 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Liquidity risk | Borrowings |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 246,189 | 373,567
Total contractual cash flows | 256,796 | 389,473
Liquidity risk | Borrowings | Within 1 year |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 89,717 | 186,029
Liquidity risk | Borrowings | Between 1 and 2 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 102,005 | 88,347
Liquidity risk | Borrowings | Between 2 and 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 60,305 | 101,273
Liquidity risk | Borrowings | Beyond 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 4,769 | 13,824
Liquidity risk | Lease liabilities |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 731,589 | 661,685
Total contractual cash flows | 836,236 | 749,246
Liquidity risk | Lease liabilities | Within 1 year |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 166,666 | 165,596
Liquidity risk | Lease liabilities | Between 1 and 2 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 143,825 | 132,995
Liquidity risk | Lease liabilities | Between 2 and 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 122,889 | 114,623
Liquidity risk | Lease liabilities | Beyond 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 402,856 | 336,032
Liquidity risk | Other current and non-current financial liabilities |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 105,632 | 146,448
Total contractual cash flows | 105,632 | 146,447
Liquidity risk | Other current and non-current financial liabilities | Within 1 year |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Liquidity risk | Other current and non-current financial liabilities | Between 1 and 2 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Liquidity risk | Other current and non-current financial liabilities | Between 2 and 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | 0 | 0
Liquidity risk | Other current and non-current financial liabilities | Beyond 3 years |  |
Disclosure of financial liabilities [line items] |  |
Financial liabilities | € 105,632 | € 146,447

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