v3.26.1
Segment Reporting - Additional Information (Detail)
6 Months Ended
Jun. 30, 2026
Segment
Segment Reporting Disclosure [Line Items]  
Number of business segments 5
Number of operating segments 4
Number of non-operating segments 1
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] srt:ChiefExecutiveOfficerMember, srt:ChiefFinancialOfficerMember
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description The CODM primarily uses segment information to identify areas to improve efficiency of resources allocation, determine where to reinvest profits, and minimize unnecessary expenses. The CODM assesses segment performance mainly through selected financial ratios such as returns on average assets and net interest margin, which identifies areas requiring action.
Swimming Pools [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 40.00%
Roofs [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 25.00%
Windows [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 10.00%
Other Product Lines [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 10.00%
Texas [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 17.00%
Texas [Member] | Home Improvement [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 14.00%
Florida [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 9.00%
Florida [Member] | Home Improvement [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 15.00%
Other States [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 10.00%
Other States [Member] | Home Improvement [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 10.00%
Geographic Concentration Risk [Member] | Sales Revenue Net [Member] | Recreational Vehicles [Member]  
Segment Reporting Disclosure [Line Items]  
Aggregate percentage of loans lending 53.00%
Geographic Concentration Risk [Member] | Sales Revenue Net [Member] | Boats [Member]  
Segment Reporting Disclosure [Line Items]  
Aggregate percentage of loans lending 22.00%
Geographic Concentration Risk [Member] | Sales Revenue Net [Member] | Cars [Member]  
Segment Reporting Disclosure [Line Items]  
Aggregate percentage of loans lending 13.00%
Geographic Concentration Risk [Member] | Sales Revenue Net [Member] | Other Product Lines [Member]  
Segment Reporting Disclosure [Line Items]  
Aggregate percentage of loans lending 10.00%
Commercial Lending Segment [Member] | Manufacturing [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 61.00%
Commercial Lending Segment [Member] | Wholesale Trade [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 14.00%
Commercial Lending Segment [Member] | Other Product Lines [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 10.00%
Commercial Lending Segment [Member] | California [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 19.00%
Commercial Lending Segment [Member] | Wisconsin [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 14.00%
Commercial Lending Segment [Member] | New York [Member]  
Segment Reporting Disclosure [Line Items]  
Loan outstanding percent 11.00%
Commercial Lending Segment [Member] | Geographic Concentration Risk [Member] | Sales Revenue Net [Member] | Other Product Lines [Member]  
Segment Reporting Disclosure [Line Items]  
Aggregate percentage of loans lending 10.00%