Fair Value Disclosures - Summary of Loans Held-for-Sale at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021
Fair Value Measurements Loans Held For Sale [Abstract]
Unpaid principal balance on loans held-for-sale	$ 15,998	$ 33,200	$ 44,784
Net unrealized gains (losses) on loans held-for-sale	(106)	922	1,297
Loans held-for-sale at fair value	$ 15,892	$ 34,122	$ 46,081