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Income taxes - Schedule of Reconciliation Between Actual Income Taxes and The Theoretical Income Taxes (Details) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Major components of tax expense (income) [abstract] |  |  |
Profit before taxes | € 140,042 | € 130,608 | € 169,094
Theoretical income tax expense - tax rate 24% | (33,610) | (31,346) | (40,583)
Non-taxable income | 4,730 | 4,302 | 11,454
Differences between foreign tax rates and the theoretical applicable tax rate | 1,073 | 133 | 5,847
Tax (expense)/benefit relating to prior years | (113) | 142 | 2,997
Deferred tax assets recognized from previous years | 9,985 | 14,516 | 7,425
Deferred tax assets not recognized | (4,850) | (8,437) | (4,107)
Tax on dividends and earnings | 757 | (4,655) | (5,613)
Other tax items | (5,659) | (12,476) | (6,363)
Total tax expense, excluding IRAP | € (27,687) | € (37,821) | € (28,943)
Effective tax rate, excluding IRAP | 19.80% | 29.00% | 17.10%
Italian regional income tax expense (IRAP) | € (2,868) | € (1,926) | € (4,490)
Income taxes | € (30,555) | € (39,747) | € (33,433)
Effective tax rate | 21.80% | 30.40% | 19.80%

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