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Securities Sold Under Agreements To Repurchase - Summary of Securities Pledged as Collateral Under Repurchase Agreements (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Offsetting Liabilities [Line Items]      
Gross amount of recognized liabilities for repurchase agreements $ 25,143 $ 25,495  
Amounts related to agreements not included in offsetting disclosures above 0 0  
Total securities pledged 25,143 25,495 $ 28,914
U.S.Treasury Securities [Member]      
Offsetting Liabilities [Line Items]      
Total securities pledged 25,143 16,478  
Obligations of U.S. Government Agencies [Member]      
Offsetting Liabilities [Line Items]      
Total securities pledged $ 0 $ 9,017