Taxation - Movement of Valuation Allowances for Deferred Tax Assets (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)
Income Tax Disclosure [Abstract]
Beginning balance	¥ (874,116)	$ (124,997)	¥ (786,853)
Additions	(71,837)	(10,273)	(127,852)
Decreases	42,382	6,061	40,589
Ending balance	¥ (903,571)	$ (129,209)	¥ (874,116)

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

Name:	us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant