Related Parties - Summary of Sales to and Purchases from ATR's Minority Shareholder and Its Affiliates (Detail) ¥ in Thousands, $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2024 CNY (¥)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 CNY (¥)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 CNY (¥)	Sep. 30, 2023 USD ($)	Sep. 30, 2023 CNY (¥)
Related Party Transaction [Line Items]
Sales to related parties	$ 96,166		$ 102,218		$ 317,369		$ 314,232
ATR [Member]
Related Party Transaction [Line Items]
Purchases from related parties	1,994	¥ 14,221	1,913	¥ 13,752	5,132	¥ 36,809	5,236	¥ 36,885
ATR [Member] | Related Party [Member]
Related Party Transaction [Line Items]
Sales to related parties	$ 4,094	¥ 29,156	$ 18	¥ 346	$ 12,267	¥ 87,980	$ 2,741	¥ 19,306