Interim condensed consolidated statement  of comprehensive income 
| 
       For the six months ended 30 June  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       in CHF 1,000  | 
    
       Note  | 
    
       2021  | 
    
       2020  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Profit for the period  | 
    
       
  | 
    
       38,336  | 
    
       66,708  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Other comprehensive income: Items that will not be reclassified to profit or loss in subsequent periods  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Remeasurements of post-employment benefit obligations  | 
    
       
  | 
    
       8,221  | 
    
       –2,423  | 
  
| 
       Taxes  | 
    
       
  | 
    
       –1,182  | 
    
       388  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Items that may be reclassified to profit or loss in subsequent periods  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Currency translation adjustment  | 
    
       
  | 
    
       14,589  | 
    
       –27,915  | 
  
| 
       Cash flow hedges  | 
    
       
  | 
    
       2,160  | 
    
       –663  | 
  
| 
       Taxes  | 
    
       
  | 
    
       –336  | 
    
       99  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Total other comprehensive income for the period  | 
    
       
  | 
    
       23,452  | 
    
       –30,514  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Total comprehensive income for the period  | 
    
       
  | 
    
       61,788  | 
    
       36,194  | 
  
| 
       
  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       Total comprehensive income attributable to:  | 
    
       
  | 
    
       
  | 
    
       
  | 
  
| 
       – Owners of the parent  | 
    
       
  | 
    
       62,020  | 
    
       36,268  | 
  
| 
       – Non-controlling interest  | 
    
       
  | 
    
       –232  | 
    
       –74  |