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Share-based Payments - Summary of share-based compensation expense (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 USD ($)
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share-based Compensation Expense | $ 68,159 | ¥ 434,350 | ¥ 330,114 | $ 121,279
Cost of revenues [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share-based Compensation Expense | 2,743 | 17,481 | 10,614 | 8,509
Selling and marketing expenses [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share-based Compensation Expense | 11,392 | 72,594 | 62,270 | 37,808
General and administrative expenses [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share-based Compensation Expense | 30,425 | 193,886 | 169,101 | 31,988
Research and development expenses [Member] |  |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] |  |  |  |
Share-based Compensation Expense | $ 23,599 | ¥ 150,389 | ¥ 88,129 | $ 42,974

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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