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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
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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Amount of stock repurchase plan authorized.

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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.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

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