Allowance for Loan Losses - Additional Information (Detail)	12 Months Ended
Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Period of hardship forbearance of payments	12 months
Period of hardship forbearance of payments for borrowers of substantial payments	24 months
Percentage guaranteed as to principal and accrued interest by federal goverment in event of default	97.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration