Fair Value Disclosures - Summary of Loans Held-for-Sale at Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Fair Value Measurements Loans Held For Sale [Abstract]
Unpaid principal balance on loans held-for-sale	$ 22,233	$ 33,200	$ 60,727
Net unrealized gains on loans held-for-sale	149	922	784
Loans held-for-sale at fair value	$ 22,382	$ 34,122	$ 61,511