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Acquisitions, Goodwill and Other Intangible Assets - Summary of Net Change in Carrying Value of Goodwill (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Goodwill [Roll Forward]    
Beginning balance $ 15,072 $ 11,459
Additions from acquisitions 3,990 0
Impairment losses 0 0
Ending balance $ 19,062 $ 11,459