Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Reconciliation of Contingent Consideration Measured at Fair Value on Recurring Basis (Detail)

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Fair Value Measurements - Schedule of Reconciliation of Contingent Consideration Measured at Fair Value on Recurring Basis (Detail) - Contingent Consideration [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning balance $ 5,572 $ 3,387
Contingent consideration in connection with acquisitions (100) 0
Change in fair value of contingent consideration (171) (225)
Payments of contingent consideration 0 0
Ending balance $ 5,301 $ 3,162