Supplemental cash flow information (Tables)

6 Months Ended

Jun. 30, 2017

Supplemental Cash Flow Elements [Abstract]

Schedule of supplemental cash flow information

	Six months ended
	June 30, 2017	June 30, 2016
	$’000	$’000
Cash paid during the period for:
Interest	14,985	27,061
Income taxes, net of refunds	6,355	8,129