Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill impairment charges	$ 0	$ 0	$ 0
Accumulated goodwill impairment losses	0
Amortization of intangible assets	$ 19,683,000	$ 22,619,000	$ 1,162,000

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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