| Income Tax (Tables)
 | 12 Months Ended | 
| Dec. 31, 2022 | 
|---|
| Major components of tax expense (income) [abstract] |  | 
| Summary of Income Tax Expense | Income tax expense is as follows:   
       
        |  |  |  |  |  |  |  |  |  |  |  |  |  |  
        |   |   | For the year ended December 31, |   |  
        |   |   | 2022 |   |   | 2021 |   |   | 2020 |   |  
        |   |   | (EUR thousand) |   |  
        | Current income tax: |   |   |   |   |   |   |   |   |   |  
        | Current Taxes |   |   | 57,400 |   |   |   | 35,093 |   |   |   | 28,604 |   |  
        | Prior Years Taxes |   |   | 215 |   |   |   | (6,544 | ) |   |   | 918 |   |  
        | Deferred tax: |   |   |   |   |   |   |   |   |   |  
        | Deferred Taxes |   |   | (12,990 | ) |   |   | 2,855 |   |   |   | (11,840 | ) |  
        | Income tax expense reported in the statement of profit or loss |   |   | 44,625 |   |   |   | 31,404 |   |   |   | 17,682 |   |  | 
| Summary of Deferred Tax Charged to OCI | 
       
        |  |  |  |  |  |  |  |  |  |  |  |  |  |  
        |   |   | For the year ended December 31, |   |  
        |   |   | 2022 |   |   | 2021 |   |   | 2020 |   |  
        |   |   | (EUR thousand) |   |  
        | Deferred tax related to items recognized in OCI during in the year: |   |   |   |   |   |   |   |   |   |  
        | Gains/(losses) from remeasurement of employee of defined benefit plans and of agent termination plans |   |   | (236 | ) |   |   | 26 |   |   |   | 15 |   |  
        | Change in the fair value of hedging instruments |   |   | (2,043 | ) |   |   | (653 | ) |   |   | 173 |   |  
        | Deferred tax charged to OCI |   |   | (2,279 | ) |   |   | (627 | ) |   |   | 188 |   |  | 
| Schedule of Reconciliation of Effective Tax Rate | The table below provides a reconciliation between actual income tax expense and the theoretical income tax expense, calculated on the basis of the applicable corporate tax rate in effect in Italy.   
       
        |  |  |  |  |  |  |  |  |  |  |  |  |  |  
        |   |   | For the year ended December 31, |   |  
        |   |   | 2022 |   |   | 2021 |   |   | 2020 |   |  
        |   |   | (EUR thousand) |   |  
        | Accounting profit before income tax |   |   | 187,641 |   |   |   | 165,673 |   |   |   | 96,279 |   |  
        | Statutory income tax rate of 27.9% |   |   | 52,202 |   |   |   | 46,223 |   |   |   | 26,862 |   |  
        | Prior years taxes |   |   | 215 |   |   |   | (6,544 | ) |   |   | 918 |   |  
        | DTA recognized on tax losses carry-forward |   |   | 750 |   |   |   | (1,947 | ) |   |   | (41 | ) |  
        | Taxes effect on unremitted earnings |   |   | 1,488 |   |   |   | 400 |   |   |   | 1,248 |   |  
        | Step up |   |   | — |   |   |   | — |   |   |   | (7,926 | ) |  
        | Change notional rate |   |   | — |   |   |   | — |   |   |   | 361 |   |  
        | Tax grants/not taxable items |   |   | (8,477 | ) |   |   | (1,157 | ) |   |   | (2,146 | ) |  
        | Tax exemption on gain from the sale of an associate |   |   | — |   |   |   | (3,378 | ) |   |   | — |   |  
        | Different foreign tax rate effect |   |   | (1,553 | ) |   |   | (2,193 | ) |   |   | (1,594 | ) |  
        | At the effective income tax rate of 23.78% (18.96% in 2021, 18.40% in 2020) |   |   | 44,625 |   |   |   | 31,404 |   |   |   | 17,682 |   |  
        | Income tax expense reported in the statement of profit or loss |   |   | 44,625 |   |   |   | 31,404 |   |   |   | 17,682 |   |  | 
| Summary of Timing of Tax Losses Carryforwards | The breakdown on the timing of tax losses carry-forwards is as follows:   
       
        |  |  |  |  |  |  |  |  |  |  
        |   |   | At December 31, |   |   | At December 31, |   |  
        |   |   | 2022 |   |   | 2021 |   |  
        |   |   | (EUR thousand) |   |  
        | Timing of unrecognized tax losses carry-forwards |   |   |   |   |   |   |  
        | 2022 |   |   | — |   |   |   | 16 |   |  
        | 2023 |   |   | 336 |   |   |   | 320 |   |  
        | 2024 |   |   | 369 |   |   |   | 351 |   |  
        | 2025 |   |   | 331 |   |   |   | 315 |   |  
        | 2026 |   |   | 334 |   |   |   | 318 |   |  
        | 2027 |   |   | 3,860 |   |   |   | 274 |   |  
        | 2028 |   |   | 404 |   |   |   | — |   |  
        | 2029 |   |   | 129 |   |   |   | — |   |  
        | Unlimited |   |   | 2,215 |   |   |   | 2,206 |   |  
        | Total unrecognized tax losses |   |   | 7,978 |   |   |   | 3,800 |   |    | 
| Summary of Deferred Tax Assets and Deferred Tax Liabilities | The analysis of deferred tax assets and deferred tax liabilities as at December 31, 2022 and 2021 is as follows:   
       
        |  |  |  |  |  |  |  |  |  |  
        |    |   | Consolidated statementof financial position
 |   |  
        |   |   | At December 31, |   |   | At December 31, |   |  
        |   |   | 2022 |   |   | 2021 |   |  
        |   |   | (EUR thousand) |   |  
        | Other intangible assets |   |   | (4,179 | ) |   |   | (3,167 | ) |  
        | Tangible assets |   |   | 19,746 |   |   |   | 12,178 |   |  
        | Work in progress |   |   | (12,329 | ) |   |   | (5,156 | ) |  
        | Revaluations of investment properties to fair value |   |   | 6,807 |   |   |   | 8,009 |   |  
        | Expected credit losses of debt financial assets |   |   | 1,217 |   |   |   | 1,429 |   |  
        | Derivatives |   |   | (1,640 | ) |   |   | 403 |   |  
        | Leases |   |   | 331 |   |   |   | 251 |   |  
        | Long term incentives |   |   | 51 |   |   |   | 816 |   |  
        | Cash settled awards |   |   | — |   |   |   | 325 |   |  
        | Provisions |   |   | 6,631 |   |   |   | 2,351 |   |  
        | Accruals and other provisions |   |   | 164 |   |   |   | 62 |   |  
        | Tax losses carry forward |   |   | 26,941 |   |   |   | 14,888 |   |  
        | Dividends |   |   | (2,260 | ) |   |   | (1,300 | ) |  
        | Start up costs IPO SG spa |   |   | 4,026 |   |   |   | 5,369 |   |  
        | Share-based compensation plans |   |   | 325 |   |   |   | — |   |  
        | Other effects |   |   | 2,427 |   |   |   | 314 |   |  
        | Deferred tax assets, net |   |   | 48,258 |   |   |   | 36,772 |   |  
        | Reflected in the statement of financial position as follows: |   |   |   |   |   |   |  
        | Deferred tax assets |   |   | 69,210 |   |   |   | 55,877 |   |  
        | Deferred tax liabilities |   |   | (20,952 | ) |   |   | (19,105 | ) |  
        | Deferred tax assets, net |   |   | 48,258 |   |   |   | 36,772 |   |    | 
| Schedule of Reconciliation of Net Deferred Tax Assets | The reconciliation of net deferred tax assets is as follows:   
       
        |  |  |  |  |  |  |  |  |  |  
        |   |   | 2022 |   |   | 2021 |   |  
        |   |   | (EUR thousand) |   |  
        | As of January 1 |   |   | 36,772 |   |   |   | 33,929 |   |  
        | Tax expense during the period recognized in profit or loss |   |   | 12,990 |   |   |   | (2,855 | ) |  
        | Tax income/(expense) during the period recognized in OCI |   |   | (2,279 | ) |   |   | (627 | ) |  
        | DTA on IPO transaction costs on capital increase |   |   | — |   |   |   | 6,711 |   |  
        | Other effect |   |   | 775 |   |   |   | (386 | ) |  
        | As at December 31 |   |   | 48,258 |   |   |   | 36,772 |   |  |