Quarterly report pursuant to Section 13 or 15(d)

Acquisitions, Goodwill and Other Intangible Assets - Summary of Net Change in Carrying Value of Goodwill (Detail)

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Acquisitions, Goodwill and Other Intangible Assets - Summary of Net Change in Carrying Value of Goodwill (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Goodwill [Roll Forward]    
Beginning balance $ 33,375 $ 15,072
Additions from acquisitions 696 9,247
Impairment losses 0 0
Ending balance $ 34,071 $ 24,319