Fair Value Measurements - Summary of Difference Between Aggregate Fair Value and Remaining Contractual Principal Outstanding for Financial Instruments for which Fair Value Option has been Elected (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Loans held for sale, unpaid principal balance	$ 43,378	$ 54,377
Loans held for sale, fair value	44,426	56,261
Loans held for sale, fair value over/(under) unpaid principal balance	$ 1,048	$ 1,884