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Share-based Compensation - Summary of Additional RSU Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Weighted Average Grant Date Fair Value, Granted (target) $ 0 $ 15.86    
Fair value of RSUs that vested $ 0 $ 0    
Restricted Stock Units (RSUs) [Member]        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Weighted Average Grant Date Fair Value, Granted (target)     $ 30.22 $ 15.86
Fair value of RSUs that vested     $ 1,199 $ 1,314