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Stock-Based Compensation Expense - Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted (Detail) - Employee Stock Option [Member]
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free rate 1.30% 1.40% 2.70%
Expected dividend yield 0.27% 0.41% 0.39%
Expected volatility 39.00% 37.00% 37.00%
Expected term (in years) 6 years 6 years 5 years 3 months 18 days