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Property, Equipment and Leasehold Improvements, Net - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Property Plant And Equipment [Abstract]        
Depreciation and amortization of property, equipment and leasehold improvements $ 6,809 $ 7,494 $ 20,972 $ 22,524