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Sales of goods (Tables)
 12 Months Ended
Dec. 31, 2017
Revenue [abstract]  
Schedule of sales of goods

This caption is made up as follows:

 

   2017     2016     2015  
   S/(000)   S/(000)   S/(000) 
                
Cement, concrete and blocks   1,076,648    1,103,426    1,089,232 
Building materials   66,442    59,888    75,565 
Quicklime   80,707    75,090    64,140 
Other   1,842    1,765    2,078 
                
   1,225,639    1,240,169    1,231,015