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Financial results (Tables)
 12 Months Ended
Dec. 31, 2018
Disclosure Of Financial costs [Abstract]  
Disclosure of detailed information about net financial income or expense [text block]
 
Amounts in US$ '000
 
2018
 
 
2017
 
 
2016
 
Financial expenses
 
 
 
 
 
 
 
 
 
 
 
 
Interest and amortization of debt issue costs
 
 
(28,955
)
 
 
(27,823
)
 
 
(28,984
)
Interest with related parties
 
 
(1,606
)
 
 
(2,224
)
 
 
(1,587
)
Less: amounts capitalized on qualifying assets
 
 
258
 
 
 
611
 
 
 
255
 
Borrowings cancellation costs
 
 
-
 
 
 
(17,575
)
 
 
-
 
Bank charges and other financial results
 
 
(5,513
)
 
 
(3,721
)
 
 
(3,220
)
Unwinding of long-term liabilities
 
 
(3,505
)
 
 
(2,779
)
 
 
(2,693
)
 
 
 
(39,321
)
 
 
(53,511
)
 
 
(36,229
)
Financial income
 
 
 
 
 
 
 
 
 
 
 
 
Interest received
 
 
3,059
 
 
 
2,016
 
 
 
2,128
 
 
 
 
3,059
 
 
 
2,016
 
 
 
2,128
 
Foreign exchange gains and losses
 
 
 
 
 
 
 
 
 
 
 
 
Foreign exchange (loss) gain
 
 
(11,323
)
 
 
(2,193
)
 
 
13,872
 
 
 
 
(11,323
)
 
 
(2,193
)
 
 
13,872
 
 
Total Financial results
 
 
(47,585
)
 
 
(53,688
)
 
 
(20,229
)