Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Goodwill [Roll Forward]    
Beginning balance $ 11,459 $ 0
Additions from acquisitions 3,613 11,459
Impairment losses 0 0
Ending balance $ 15,072 $ 11,459