Share-based Compensation - Summary of RSU Activity (Parenthetical) (Detail) |
12 Months Ended |
---|---|
Dec. 31, 2020 | |
Restricted Stock Units (RSUs) [Member] | Long Term Incentive Plan [Member] | |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | |
The target percentage of RSUs earned and vested | 116.50% |