Securities Sold Under Agreements To Repurchase - Summary of Securities Pledged as Collateral Under Repurchase Agreements (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Offsetting Liabilities [Line Items]
Gross amount of recognized liabilities for repurchase agreements	$ 0	$ 25,143
Amounts related to agreements not included in offsetting disclosures above	0	0
Total securities pledged	0	25,143	$ 25,495
U.S.Treasury Securities [Member]
Offsetting Liabilities [Line Items]
Total securities pledged	0	25,143
Obligations of U.S. Government Agencies [Member]
Offsetting Liabilities [Line Items]
Total securities pledged	$ 0	$ 0