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Disclosures on reserves in Equity (Details 1) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of Disclosures on equity [Line Items]        
Number of current shares   7,138,685    
Capital amount in shares $ 477,386 $ 477,386    
Amount of reserves $ (14,223) $ (14,999) $ (14,349) $ (12,888)
Series A preferred shares [Member]        
Disclosure of Disclosures on equity [Line Items]        
Number of authorized shares 142,819,552 142,819,552    
Number of fully subscribed and paid shares 142,819,552 142,819,552    
Number of subscribed, partially paid shares 0 0    
Par value of shares in ThUS$ $ 943.5 $ 943.5    
Increase (decrease) in the number of current shares 0 0    
Number of current shares 142,819,552 142,819,552    
Number of shares owned by the entity or its subsidiaries or associates 0 0    
Number of shares whose issuance is reserved due to the existence of options or agreements to dispose shares 0 0    
Capital amount in shares $ 134,750 $ 134,750    
Amount of premium issuance 0 0    
Amount of reserves $ 0 $ 0    
Total number of subscribed shares, total 142,819,552 142,819,552    
Series B preferred shares [Member]        
Disclosure of Disclosures on equity [Line Items]        
Number of authorized shares 120,376,972 120,376,972    
Number of fully subscribed and paid shares 120,376,972 120,376,972    
Number of subscribed, partially paid shares 0 0    
Par value of shares in ThUS$ $ 2,846.4 $ 2,846.4    
Increase (decrease) in the number of current shares 0 0    
Number of current shares 120,376,972 120,376,972    
Number of shares owned by the entity or its subsidiaries or associates 0 0    
Number of shares whose issuance is reserved due to the existence of options or agreements to dispose shares 0 0    
Capital amount in shares $ 342,636 $ 342,636    
Amount of premium issuance 0 0    
Amount of reserves $ 0 $ 0    
Total number of subscribed shares, total 120,376,972 120,376,972