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Taxation - Summary of Aggregate Amount and Per Share Effect of Tax Holidays (Detail) - CNY (¥) ¥ / shares in Units, ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Tax holiday effect	¥ 202,923	¥ 460,333	¥ 153,908
Net income per share effect - Basic	¥ 0.13	¥ 0.31	¥ 0.20
Net income per share effect - Diluted	¥ 0.13	¥ 0.29	¥ 0.20

X

- Definition

Income Tax Holiday, Income Tax Benefits Per Share Basic

+ References

No definition available.

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X

- Definition

Income Tax Holiday, Income Tax Benefits Per Share Diluted

+ References

No definition available.

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- References

No definition available.

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- Definition

The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330215-122817

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