Financial Instruments-risk management (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Of Financial Instruments-risk management [Abstract]

Disclosure of detailed information about gearing ratios [text block]

The gearing ratios at 31 December 2018 and 2017 were as follows:

Amounts in US$ '000	2018			2017
Net Debt		319,275			291,449
Total Equity		143,021			126,840
Total Capital		462,296			418,289
Gearing Ratio		69	%		70	%