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Reserves - Summary of Other Components of Equity (Detail) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
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Disclosure of other components of equity [line items] |  |  |
Other components of equity | ¥ (140,792) | $ (22,269) | ¥ (161,359)
Foreign currency translation reserve [member] |  |  |
Disclosure of other components of equity [line items] |  |  |
Other components of equity | (118,176) | (18,692) | (89,925)
Performance shares reserves [member] |  |  |
Disclosure of other components of equity [line items] |  |  |
Other components of equity | 19,758 | 3,125 | 19,758
Premium paid for acquisition of non-controlling interests [member] |  |  |
Disclosure of other components of equity [line items] |  |  |
Other components of equity | (11,472) | (1,814) | (11,472)
Fair value reserve of financial assets at FVOCI |  |  |
Disclosure of other components of equity [line items] |  |  |
Other components of equity | ¥ (30,902) | $ (4,888) | ¥ (79,720)

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