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v3.21.1

Share-based Payments - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 31, 2020 | Feb. 28, 2020 | Jul. 31, 2019 | Feb. 28, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  | $ 5.3 | $ 6.1 | $ 7.1
Fair value of non-vested stock awards | $ 93.99 | $ 93.99 | $ 96.46 | $ 96.46 |  |  |
Estimated compensation cost for next year |  |  |  |  | $ 1.9 | $ 4.0 |
Weighted average remaining contractual life |  |  |  |  | 1 year 7 months 6 days | 2 years 1 month 6 days |
Expected term |  |  |  |  | 10 years |  |
Bottom of range [member] |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Vesting period |  |  |  |  | 3 years |  |
Top of range [member] |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Vesting period |  |  |  |  | 5 years |  |
2017 [member] |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |
Estimated compensation cost for next year |  |  |  |  | $ 1.4 |  |

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- Definition Fair value of non-vested stock award. + References No definition available. + Details
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- Definition Remaining compensation cost, not yet recognized for non-vested stock awards. + References No definition available. + 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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- Definition The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_d&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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- Details
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- Details
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