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Significant Estimates and Concentrations of Credit Risks - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Loans Receivable | Geographic Concentration | Alabama Arkansas Florida Texas And New York
Commitment And Contingencies [Line Items]
Concentration percentage	79.80%
Loans Receivable | Commercial Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	57.90%	57.60%
Loans Receivable | Residential Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	16.90%	16.60%
Total Stockholders' Equity | Commercial Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	214.20%	214.60%
Total Stockholders' Equity | Residential Real Estate | Credit Concentration
Commitment And Contingencies [Line Items]
Concentration percentage	62.40%	61.90%
Residential Real Estate Loans | Geographic Concentration | Alabama Arkansas Florida Texas And New York
Commitment And Contingencies [Line Items]
Concentration percentage	83.90%

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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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