Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept | As at 2021-12-31 | As at 2020-12-31 | As at 2019-12-31 | 
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment | 
                                                66,454
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                68,274
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Investment property [abstract] | |||
| Investment property | 
                                                192,515
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                193,760
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||
| Investments in associates reported in separate financial statements | 
                                                854,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                782,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables | 
                                                274,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                290,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Trade and other current receivables [abstract] | |||
| Trade and other current receivables | 
                                                74,293
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                95,732
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Categories of non-current financial assets [abstract] | |||
| Non-current financial assets | 
                                                689,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                508,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Categories of current financial assets [abstract] | |||
| Current financial assets | 
                                                36,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                96,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Classes of current inventories [abstract] | |||
| Current inventories | 
                                                38,950
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                28,908
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents | 
                                                1,708
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                1,707
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                1,612
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners | 
                                                -
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                2,271
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings | 
                                                42,122
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                86,520
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Current borrowings and current portion of non-current borrowings [abstract] | |||
| Current borrowings and current portion of non-current borrowings | 
                                                61,469
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                17,080
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Trade and other current payables | 
                                                108,362
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                120,797
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Issued capital [abstract] | |||
| Issued capital | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                188,729
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Retained earnings [abstract] | |||
| Retained earnings | 
                                                140,902
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                141,303
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Net assets (liabilities) [abstract] | |||
| Assets | 
                                                380,293
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                396,161
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Net current assets (liabilities) [abstract] | |||
| Current assets | 
                                                114,987
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                128,714
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Current liabilities | 
                                                172,484
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                141,074
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | — | 
| Assets less current liabilities [abstract] |