Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Additional Information (Detail)

v3.21.2
Stock Based Compensation - Additional Information (Detail) - USD ($)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Unrecognized compensation cost related to unvested stock-based awards granted to employees under the equity incentive plans $ 39,400,000  
Unrecognized compensation cost related to unvested stock-based awards granted to employees under the equity incentive plans, period for recognition 2 years 7 months 17 days  
Total intrinsic value of stock options exercised $ 1,200,000 $ 2,400,000
Cash received from stock option exercises 1,582,000 $ 930,000
Tax benefit realized upon exercise of option $ 0