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Share-Based Compensation - Additional Information (Details)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2021
CNY (¥)
$ / shares
Dec. 31, 2021
CNY (¥)
¥ / shares
shares
Dec. 31, 2020
shares
Dec. 31, 2019
shares
Dec. 31, 2017
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average grant date fair value of options granted | (per share) $ 48.11 ¥ 306.56      
Options granted | shares   268,006      
Options exercised | shares   37,606 152,410 201,630  
Aggregate intrinsic value of options   ¥ 15,674      
Unrecognized compensation expense related to unvested share options $ 76,105 ¥ 76,105      
Unrecognized compensation expense, period for recognition   4 years 2 months 26 days      
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation expense, period for recognition   5 years 18 days      
Total fair value of non-vested restricted shares   ¥ 29,784      
Unrecognized compensation expense related to non-vested restricted shares $ 43,976 ¥ 43,976      
Stock Incentive Plan 2017          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum number of shares that may be issued | shares         2,800,000
Stock Incentive Plan 2017 | Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock incentive plans, term         10 years
Vesting period for remaining the 75% of options granted         36 months
Stock Incentive Plan 2017 | Stock Options | First anniversary of the grant date          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage         25.00%
Stock Incentive Plan 2017 | Stock Options | Vesting ratably over the following 36 months          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting percentage         75.00%