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INCOME TAXES - Expiry Date of Non-Capital Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | $ 1,249,000 | $ 990,000
Non-Capital Losses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 963,000 | 658,000
Non-Capital Losses | 2021 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 36,000 | 5,000
Non-Capital Losses | 2022 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 37,000 | 36,000
Non-Capital Losses | 2023 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 18,000 | 38,000
Non-Capital Losses | 2024 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 7,000 | 29,000
Non-Capital Losses | 2025 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 5,000 | 4,000
Non-Capital Losses | Beyond |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 287,000 | 223,000
Non-Capital Losses | Do not expire |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | $ 573,000 | $ 323,000

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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_e&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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