Income Taxes - Schedule Of Effects of Preferential Tax Rates on Earnings per share (Detail) - CNY (¥) ¥ / shares in Units, ¥ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Effects Of Preferential Tax Rates On Earnings Per Share [Line Items]
Tax saving amount due to preferential tax rates	¥ 635,456	¥ 86,110	¥ 0
Effect on basic earnings per share	¥ 0.03	¥ 0	¥ 0
Effect on diluted earnings per share	¥ 0.03	¥ 0	¥ 0

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479360/740-10-S99-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration