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Compensation and Benefit Plans - Schedule of Fair Value of Option Grant Using Black-Scholes Option Pricing Model With Weighted Average Assumptions (Detail) - $ / shares
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Expected life 5 years  
Stock Options    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Dividend yield 0.00% 0.00%
Expected life 6 years 6 months 6 years 6 months
Expected volatility 38.51% 16.94%
Risk-free interest rate 0.48% 2.51%
Weighted average grant date fair value $ 3.77 $ 4.01