Goodwill and Other Intangible Assets - Components of Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 375,784	$ 379,421	$ 379,682	$ 383,861
Other intangible assets (net of accumulated amortization)	105	150
Goodwill and other intangible assets, Total	$ 375,889	$ 379,571