XML 94 R71.htm IDEA: XBRL DOCUMENT v3.19.1
Basis of presentation for the consolidated financial statements (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Jan. 01, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items]        
Investments classified using the equity method of accounting $ 111,549   $ 152,630 $ 133,140
Intangible assets other than goodwill 188,283   113,787 109,439
Goodwill 34,718 $ 37,972 37,972 37,972
Property, plant and equipment 1,454,823   1,429,354 1,532,710
Total $ 4,268,094   4,296,236 $ 4,217,980
Balances originally reported [Member]        
Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items]        
Investments classified using the equity method of accounting     146,425  
Intangible assets other than goodwill     105,948  
Goodwill     44,177  
Property, plant and equipment     1,437,193  
Total     1,733,743  
Reclassified balances [member]        
Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items]        
Investments classified using the equity method of accounting     152,630  
Intangible assets other than goodwill     113,787  
Goodwill     37,972  
Property, plant and equipment     1,429,354  
Total     1,733,743  
Reclassification balances [Member]        
Disclosure Of Basis Of Presentation For Consolidated Financial Statement [Line Items]        
Investments classified using the equity method of accounting     6,205  
Intangible assets other than goodwill     7,839  
Goodwill     (6,205)  
Property, plant and equipment     (7,839)  
Total     $ 0