Financial Instruments-risk management (Tables)

12 Months Ended

Dec. 31, 2017

Disclosure Of Financial Instruments-risk management [Abstract]

Disclosure of detailed information about gearing ratios [text block]

The gearing ratios at 31 December 2017 and 2016 were as follows:

Amounts in US$ '000	2017			2016
Net Debt		291,449			285,109
Total Equity		126,840			141,593
Total Capital		418,289			426,702
Gearing Ratio		70	%		67	%