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v3.20.4

Summary of Shares Outstanding Under Share Based Incentive Plans (Detail) - shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Equity-Settled Plans [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Beginning balance | 4,659 | 4,659
Redeemed | (3,189) |
Ending balance | 1,470 | 4,659
Restricted Share Units (RSUs) [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Beginning balance | 316,904 | 202,796
Granted | 363,253 | 209,368
Redeemed | (127,884) | (75,284)
Forfeited | (67,491) | (19,976)
Ending balance | 484,782 | 316,904
Performance Share Units (PSUs) [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Beginning balance | 166,768 | 227,150
Granted | 502,558 | 101,945
Redeemed | (39,028) | (66,138)
Forfeited | (64,919) | (96,189)
Ending balance | 565,379 | 166,768
Executive Performance Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Beginning balance | 368,845 | 159,553
Granted |  | 210,580
Redeemed | (57,442) |
Forfeited | (22,696) | (1,288)
Ending balance | 288,707 | 368,845
Deferred Share Units (DSUs) [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [Line Items] |  |
Beginning balance | 89,613 | 52,682
Granted |  | 36,931
Redeemed | (12,039) |
Ending balance | 77,574 | 89,613

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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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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_47_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 + Details
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