Loans Held for Investment - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2023	Dec. 31, 2024
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Carrying value of foreclosed properties	$ 141,000	$ 0
Mortgages [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Concentrations of Loans as Percentage of Net Loans		32.90%
Commercial Loan [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Concentrations of Loans as Percentage of Net Loans		36.90%
Real Estate - Residential [Member]
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items]
Real estate in process of foreclosure, loan amount	0	$ 93,000
Foreclosed residential real estate, loan amount	$ 0

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 35
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-35

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- Definition

Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
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-Name Accounting Standards Codification
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-Publisher FASB
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 944
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Carrying value of foreclosed properties.

+ References

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Concentrations of loans as percentage of net loans.

+ References

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