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Reportable segments (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement [Line Items]      
Revenue $ 1,943,655 $ 2,265,803 $ 2,157,323
Investments accounted for using equity method 109,435 111,549 152,630
Intangible assets other than goodwill 188,358 189,350  
Goodwill 34,726 34,866 37,972
Property, plant and equipment 1,607,070 1,454,823 1,429,354
Other non-current assets 19,729 27,539  
Non-current assets that are not financial instruments 1,959,318 1,818,127  
Chile [Member]      
Statement [Line Items]      
Revenue 211,857 189,349 $ 161,564
Investments accounted for using equity method 0 6,588  
Intangible assets other than goodwill 106,910 110,544  
Goodwill 23,205 22,535  
Property, plant and equipment 1,559,080 1,445,349  
Other non-current assets 20,321 17,111  
Non-current assets that are not financial instruments 1,709,516 1,588,951  
Latin America and the Caribbean [Member]      
Statement [Line Items]      
Revenue 161,928 180,189  
Investments accounted for using equity method 5,175 0  
Intangible assets other than goodwill 420 1,215  
Goodwill 0 86  
Property, plant and equipment 513 347  
Other non-current assets 28 23  
Non-current assets that are not financial instruments 4,214 1,671  
Europe [Member]      
Statement [Line Items]      
Revenue 393,764 479,664  
Investments accounted for using equity method 42,243 61,256  
Intangible assets other than goodwill 1,397 238  
Goodwill 11,521 11,521  
Property, plant and equipment 6,241 4,451  
Other non-current assets 4 0  
Non-current assets that are not financial instruments 61,406 77,466  
North America [Member]      
Statement [Line Items]      
Revenue 451,272 471,515  
Investments accounted for using equity method 14,669 16,115  
Intangible assets other than goodwill 2,683 152  
Goodwill 0 724  
Property, plant and equipment 8,333 3,098  
Other non-current assets 624 892  
Non-current assets that are not financial instruments 25,061 19,197  
Asia and others [Member]      
Statement [Line Items]      
Revenue 724,834 945,086  
Investments accounted for using equity method 57,698 40,766  
Intangible assets other than goodwill 76,948 77,201  
Goodwill 0 0  
Property, plant and equipment 32,903 1,578  
Other non-current assets 0 11,297  
Non-current assets that are not financial instruments $ 167,549 $ 130,842