DERIVATIVE FINANCIAL INSTRUMENTS - Currency Risk Management (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
U S Dollar Call Options
Disclosure of detailed information about financial instruments [line items]
Notional amount	$ 0	$ 0
2021
Disclosure of detailed information about financial instruments [line items]
Non-hedge derivatives	$ 1,188,000	$ 252,000

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant