Disclosure Of First-Time Adoption [Text Block]
| Concept | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | As at 2021-12-31 | 2021-01-01 to 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | 2021-01-01 to 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | 2021-01-01 to 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | 2021-01-01 to 2021-12-31 | 2020-01-01 to 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | 2020-01-01 to 2020-12-31 | 2020-01-01 to 2020-12-31 | 2020-01-01 to 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | As at 2020-12-31 | 2020-01-01 to 2020-12-31 | 2020-01-01 to 2020-12-31 | 2020-01-01 to 2020-12-31 | 2020-01-01 to 2020-12-31 | 2020-01-01 to 2020-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | As at 2019-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Disclosure of first-time adoption [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of comparative information prepared under previous GAAP [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Disclosure of comparative information prepared under previous GAAP [abstract] | |||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of comparative information prepared under previous GAAP [line items] | |||||||||||||||||||||||||||||||||||||||||||||
| Equity | — | — | 
                                                607,949,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                26,965,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                11,765,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                326,297,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | 
                                                602,538,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                110,470,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                89,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                127,130,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                5,411,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                5,417,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                580,388,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                127,130,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                16,702,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                305,339,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                20,880,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                133,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                110,470,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                585,805,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | 
                                                564,535,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                5,479,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                570,014,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                110,470,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                25,802,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                267,451,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                33,682,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                127,130,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Comprehensive income | 
                                                6,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                22,066,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                26,965,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                6,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                4,937,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                44,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                22,060,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                15,789,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                20,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                4,916,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                20,880,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                133,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                62,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                15,851,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
| Profit (loss) | 
                                                9,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                26,965,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                26,965,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                26,956,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                20,834,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                20,880,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                46,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                20,880,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — |