Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Additional Information (Detail)

v3.21.2
Fair Value Measurements - Additional Information (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value, assets, level 3 transfers, amount $ 0 $ 0  
Contingent and deferred consideration, maximum undiscounted payment $ 30,300,000   $ 33,200,000
Recurring [Member] | Maximum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Earn-out period for contingent and deferred consideration 6 years    
Recurring [Member] | Minimum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Earn-out period for contingent and deferred consideration 1 year