Pensions (Tables)

6 Months Ended

Jun. 30, 2017

Compensation and Retirement Disclosure [Abstract]

Schedule of components of net periodic pension benefit cost

Components of net periodic pension benefit cost are as follows:

	Three months ended				Six months ended
	June 30, 2017		June 30, 2016		June 30, 2017		June 30, 2016
	$’000		$’000		$’000		$’000
Service cost	—		—		—		—
Interest cost on projected benefit obligation	177		227		348		453
Expected return on assets	(247	)	(294	)	(487	)	(589	)
Net amortization and deferrals	193		161		381		323
Net periodic benefit cost	123		94		242		187