Leases - Reconciliation of Lease Commitments (Details) $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($)
Reconciliation Of Lease Commitments [Roll Forward]
Operating lease commitments at December 31, 2018	$ 19,260
Discounted using the incremental borrowing rate at January 1, 2019	(2,819)
Recognition exemptions for short-term and low-value leases	(455)
Variable payments not included in lease liabilities	(233)
Lease obligations recognized at January 1, 2019 related to operating lease commitments at December 31, 2018	$ 15,753

The amount of the expense relating to variable lease payments not included in the measurement of lease liabilities. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. [Refer: Lease liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_e&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_ExpenseRelatingToVariableLeasePaymentsNotIncludedInMeasurementOfLeaseLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration