Quarterly report pursuant to Section 13 or 15(d)

Acquisitions, Goodwill and Other Intangible Assets - Summary of Goodwill and Intangible Assets (Detail)

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Acquisitions, Goodwill and Other Intangible Assets - Summary of Goodwill and Intangible Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]        
Goodwill, gross carrying amount $ 24,319 $ 15,072    
Intangible assets, gross carrying amount 17,291 9,050    
Goodwill and intangible assets, gross carrying amount, total 41,610 24,122    
Goodwill, accumulated amortization 0 0    
Intangible assets, accumulated amortization (4,727) (1,810)    
Goodwill, net book value 24,319 15,072 $ 11,459 $ 11,459
Intangible assets, net book value 12,564 7,240    
Goodwill and intangible assets, net book value $ 36,883 $ 22,312