Loans and Allowance for Credit Losses - Summary of Summary of Total Nonaccrual Loans and Foregone Interest (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Receivables [Abstract]
Total nonaccrual loans	$ 21,881	$ 25,974
Interest foregone quarter to date	309	928
Amount of foregone interest applied to principal in the quarter	64	238
Interest foregone life-to-date	1,101	2,119
Amount of foregone interest applied to principal life-to-date	$ 816	$ 822
Percentage of nonaccrual loans to gross loan portfolio	1.00%	1.20%
Percentage of allowance for credit losses to nonaccrual loans	383.10%	324.30%