Disclosure of detailed information about pension obligation (Details) - Pension obligations [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement [Line Items]
Pension obligation - current	$ 19,401	$ 24,635
Pension obligation - non-current	22,221	28,379
Total pension obligation	$ 41,622	$ 53,014

The present value of the defined benefit obligation, less the fair value of the plan assets (if any). [Refer: Plan assets [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2017-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_SurplusDeficitInPlan
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant