Employees
| Concept | As at 2025-03-31 | As at 2025-03-31 | As at 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | As at 2023-03-31 | As at 2022-03-31 | As at 2022-03-31 | As at 2021-03-31 | As at 2021-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Employees | ||||||||||
| Information about reporting company | ||||||||||
| Number of employees of reporting company | ||||||||||
| Number of employees | 
                                                582
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                433
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                419
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                568
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                572
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                430
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                399
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                536
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                563
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                406
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             |