Analysis Of Income And Expense [Abstract]
| Concept | 2021-01-01 to 2021-12-31 | 2020-01-01 to 2020-12-31 | 
|---|---|---|
| Analysis of income and expense [abstract] | ||
| Revenue [abstract] | ||
| Revenue | 
                                                376,232
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                357,788
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Material income and expense [abstract] | ||
| Finance income (cost) | 
                                                3,052
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                4,166
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Revenue and other operating income | 
                                                384,806
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                376,643
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Operating expense excluding cost of sales | 
                                                18,270
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                20,060
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Expenses by nature [abstract] | ||
| Classes of employee benefits expense [abstract] | ||
| Employee benefits expense | 
                                                24,810
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                25,265
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||
| Depreciation and amortisation expense [abstract] | ||
| Depreciation and amortisation expense | 
                                                4,756
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                4,199
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Other expenses, by nature | 
                                                1,186
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                5,507
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Expenses, by nature | 
                                                381,912
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                377,962
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Disclosure of attribution of expenses by nature to their function [text block] | — | — | 
| Disclosure of attribution of expenses by nature to their function [abstract] | ||
| Disclosure of attribution of expenses by nature to their function [line items] | ||
| Share of profit (loss) of associates and joint ventures accounted for using equity method [abstract] | ||
| Share of profit (loss) of associates accounted for using equity method | 
                                                72,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                282,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
| Comprehensive income, continuing and discontinued operations [abstract] | ||
| Comprehensive income | 
                                                515,000
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             | 
                                                6,338
                                                
                                                    
                                                        iso4217:HRK
                                                    
                                                
                                             |