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Share-based Payments - Issuance of Restricted Shares (Detail) shares in Thousands | May 10, 2016 shares $ / shares | Jul. 21, 2015 shares $ / shares | Dec. 31, 2019 shares | Dec. 31, 2018 shares
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Disclosure of share based payments other than equity instrument [line items] |  |  |  |
Grant date | May 10,2016 | July 21,2015 |  |
July 21, 2015 [member] |  |  |  |
Disclosure of share based payments other than equity instrument [line items] |  |  |  |
Number of shares returned due to employee resignation |  |  |  | (256)
May 10, 2016 [member] |  |  |  |
Disclosure of share based payments other than equity instrument [line items] |  |  |  |
Number of shares returned due to employee resignation |  |  | (25) | (116)
Restricted shares award agreement [member] | July 21, 2015 [member] |  |  |  |
Disclosure of share based payments other than equity instrument [line items] |  |  |  |
Type of arrangement |  | Restricted shares award agreement |  |
Share price on grant date | $ / shares |  | $ 36.1 |  |
Number of shares |  | 15,752 |  |
Contract period |  | 3 years |  |
Vesting condition |  | Meet service and performance conditions |  |
Restricted shares award agreement [member] | May 10, 2016 [member] |  |  |  |
Disclosure of share based payments other than equity instrument [line items] |  |  |  |
Type of arrangement | Restricted shares award agreement |  |  |
Share price on grant date | $ / shares | $ 30.6 |  |  |
Number of shares | 1,548 |  |  |
Contract period | 3 years |  |  |
Vesting condition | Meet service and performance conditions |  |  |

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- Definition The date on which share-based payment arrangements are granted. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph IG23 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_IG23&doctype=Implementation%20Guidance -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The description of the vesting requirements for a type of share-based payment arrangement that existed at any time during the period. An entity with substantially similar types of share-based payment arrangements may aggregate this information. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_a&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The weighted average exercise price of other equity instruments (ie other than share options) granted in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45&doctype=Standard -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_d&doctype=Standard -URIDate 2019-03-27 + Details
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