Statement Of Changes In Net Assets Available For Benefits [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|
| Statement of changes in net assets available for benefits [abstract] | ||
| Reconciliation of changes in net assets available for benefits [abstract] | ||
| Changes in net assets available for benefits [abstract] | ||
| Other income | 
                                                288,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                455,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Administrative expenses | 
                                                7,713,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                6,542,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Other expense, by function | 
                                                187,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                404,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Tax expense (income) | 
                                                3,388,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                3,956,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |