Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	9 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, impairment loss	$ 0
Other intangible assets, impairment loss	0
Net carrying amount of goodwill and other intangible assets	$ 135,026,000	$ 72,277,000

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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