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Share-Based Compensation - Additional Information (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 01, 2017 shares | Jul. 23, 2014 shares | Dec. 31, 2021 CNY (¥) ¥ / shares shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 CNY (¥) ¥ / shares | Dec. 31, 2019 CNY (¥) ¥ / shares | Dec. 31, 2021 USD ($) shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Fair value of awards vested expenses recognized |  |  | ¥ 30,212 | $ 4,741 | ¥ 28,858 | ¥ 47,284 |
Share Options |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value |  |  | 24,640 | 3,867 | 38,585 | 53,338 |
Fair value of awards vested expenses recognized |  |  | 30,212 | $ 4,741 | ¥ 28,858 | ¥ 47,284 |
Unrecognized share-based compensation expense |  |  | ¥ 17,366 |  |  |  | $ 2,725
Unrecognized share-based compensation expense estimated weighted-average period |  |  | 1 year 10 months 9 days | 1 year 10 months 9 days |  |  |
Weighted average grant-date fair value per share, granted | (per share) |  |  | ¥ 24.61 | $ 3.86 | ¥ 18.97 | ¥ 50.18 |
Restricted Share Units |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Weighted average grant-date fair value per share, granted | (per share) |  |  | ¥ 13.92 | $ 2.18 | ¥ 20.41 | ¥ 45.09 |
Unrecognized share-based compensation cost |  |  | ¥ 1,144 |  |  |  | $ 180
2014 Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  | 4 years |  |  |  |  |
Common shares reserved for issuance |  | 5,500,000 |  |  |  |  |
Share available for grant |  |  | 37,911 |  |  |  | 37,911
2014 Incentive Plan | Maximum |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards expiration period |  | 10 years |  |  |  |  |
2017 Incentive Plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period | 4 years |  |  |  |  |  |
Common shares reserved for issuance | 6,015,137 |  |  |  |  |  |
Share available for grant |  |  | 934,572 |  |  |  | 934,572
2017 Incentive Plan | Maximum |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards expiration period | 10 years |  |  |  |  |  |
2021 incentive plan |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  |  | 4 years | 4 years |  |  |
Awards expiration period |  |  | 10 years | 10 years |  |  |
Common shares reserved for issuance |  |  | 4,000,000 |  |  |  | 4,000,000
Share available for grant |  |  | 4,000,000 |  |  |  | 4,000,000
2014, 2017 and 2021 Plans |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards expiration period |  |  | 10 years | 10 years |  |  |
2014, 2017 and 2021 Plans | Maximum |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  |  | 4 years | 4 years |  |  |
2014, 2017 and 2021 Plans | Minimum |  |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |  |
Awards vesting period |  |  | 1 year | 1 year |  |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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