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Subsidiaries (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure of subsidiaries [line items]  
Schedule of Information Relating to each of the Group's Subsidiaries
The following table summarizes the information relating to each of the Group’s subsidiaries in 2018, 2017 and 2016 that has material NCI:
 
 
   
As at and for the year ended December 31,
  
   
2018
    
2017
      
2016*        
  
   
OPC Energy Ltd.
    
OPC Energy Ltd.
    
Samay I.S.A
    
Nicaragua Energy Holding
    
Kallpa Generacion S.A.
    
Cerro del Aguila S.A.
  
   
$ Thousands
  
NCI percentage **
    
32.23
%
    
34.82
%
    
25.10
%
    
35.42
%
    
25.10
%
    
25.10
%
Current assets
    
184,211
      
204,461
      
75,485
      
41,630
      
108,246
      
53,843
  
Non-current assets
    
720,469
      
736,123
      
380,947
      
144,313
      
611,928
      
949,440
  
Current liabilities
    
(77,792
)
    
(99,441
)
    
(73,846
)
    
(26,053
)
    
(55,323
)
    
(85,935
)
Non-current liabilities
    
(624,570
)
    
(667,996
)
    
(311,030
)
    
(100,834
)
    
(511,277
)
    
(618,219
)
Net assets
    
202,318
      
173,147
      
71,556
      
59,056
      
153,574
      
299,129
  
Carrying amount of NCI
    
65,215
      
60,290
      
17,961
      
20,918
      
38,547
      
75,081
  
                                                 
                                                 
Revenues
    
363,262
      
365,395
      
40,000
      
90,017
      
438,475
      
49,646
  
Profit
    
26,266
      
15,934
      
548
      
7,511
      
35,820
      
9
  
Other comprehensive (loss)/income
    
(14,280
)
    
8,514
      
4,825
      
—
      
—
      
10,449
  
Profit attributable to NCI
    
11,396
      
8,323
      
138
      
2,660
      
8,991
      
2
  
OCI attributable to NCI
    
(4,554
)
    
3,686
      
1,211
      
—
      
—
      
2,623
  
Cash flows from operating activities
    
85,581
      
110,290
      
(1,276
)
    
17,737
      
114,838
      
25,629
  
Cash flows from investing activities
    
(102,080
)
    
(154,194
)
    
(60,468
)
    
(931
)
    
(16,082
)
    
(69,372
)
Cash flows from financing activities excluding dividends paid to non-controlling interests
    
(34,474
)
    
165,107
      
—
      
(4,004
)
    
(16,943
)
    
—
  
Dividends paid to non-controlling interests
    
—
      
(4,159
)
    
47,088
      
(26,440
)
    
(88,911
)
    
62,823
  
Effect of changes in the exchange rate on cash and cash equivalents
    
(7,570
)
    
7,126
      
373
      
(348
)
    
198
      
369
  
Net (decrease)/increase in cash and cash equivalents
    
(58,543
)
    
124,170
      
(14,283
)
    
(13,986
)
    
(6,900
)
    
19,449
  
 
* These entities are discontinued operations in 2017.
** The NCI percentage represents the effective NCI of the Group.