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Share Repurchase - Additional Information (Details) $ / shares in Units, ¥ in Thousands, $ in Thousands | Feb. 25, 2021 $ / shares shares | Dec. 01, 2020 USD ($) | Dec. 31, 2021 CNY (¥) shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 CNY (¥) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 CNY (¥) shares | Dec. 31, 2019 USD ($) shares
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Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Ordinary shares, treasury stock | 1,116,885 |  | 919,515 | 919,515 | 544,202 | 544,202 | 140,479 | 140,479
Treasury stock, value |  |  | ¥ 541,379 | $ 84,954 | ¥ 290,913 | $ 44,584 | ¥ 40,267 | $ 6,190
Amount of authorized share repurchase program | $ |  | $ 100,000 |  |  |  |  |  |
Stock repurchase program period |  | 2 years |  |  |  |  |  |
American Depositary Shares |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |
Ordinary shares, treasury stock | 2,233,770 |  |  |  | 1,088,404 | 1,088,404 | 280,958 | 280,958
Average price | $ / shares | $ 44.77 |  |  |  |  |  |  |

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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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