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Leases - Additional Information (Detail) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Leases [Abstract]      
Cost $ 5.0 $ 3.9  
Payments $ 4.3 $ 3.3  
Weighted average remaining lease term 11 years   10 years
Weighted average discount rate 5.80%   5.80%