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Significant Estimates and Concentrations of Credit Risks - Additional Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Loans Receivable | Geographic Concentration | Alabama Arkansas Florida Texas And New York
Commitment And Contingencies [Line Items]
Concentration percentage	78.20%
Loans Receivable | Commercial Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	55.80%	57.60%
Loans Receivable | Residential Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	18.70%	16.60%
Total Stockholders' Equity | Commercial Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	202.50%	214.60%
Total Stockholders' Equity | Residential Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	67.80%	61.90%
Residential Real Estate Loans | Geographic Concentration | Alabama Arkansas Florida Texas And New York
Commitment And Contingencies [Line Items]
Concentration percentage	82.60%

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Commitment And Contingencies [Line Items]

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-42

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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-Name Accounting Standards Codification
-Section 50
-Paragraph 20
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-20

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-18

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
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-Section 50
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