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SHARE-BASED PAYMENTS - Deferred share unit plan (Details) - Deferred share unit plan $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) EquityInstruments $ / shares | Dec. 31, 2019 USD ($) EquityInstruments $ / shares
Share-based payment transaction |  |
Minimum percentage of compensation for computing number of share units to outside director (as a percent) | 50.00% |
DSUs granted | 203,000 | 269,000
Weighted average grant-date fair value (CDN$/ unit) | $ / shares | $ 8.66 | $ 5.39
Number of share units outstanding | 1,422,650 |
Recognized liability | $ | $ 10.4 | $ 7.8

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- Definition The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 51 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_51_b_i&doctype=Standard -URIDate 2020-01-01 + Details
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