XML 197 R178.htm IDEA: XBRL DOCUMENT v3.8.0.1
Employee Benefits (Details Textual)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Employee Benefits [Line Items]    
Weighted average duration of short term employee benefit obligations 12  
Chile [Member]    
Disclosure Of Employee Benefits [Line Items]    
Actuarial assumption of discount rates 5.96% 5.52%
Argentina [Member]    
Disclosure Of Employee Benefits [Line Items]    
Actuarial assumption of discount rates 24.55% 31.88%