Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	$ 486	$ 866
Core deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	395	718
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	$ 91	$ 148