Quarterly report [Sections 13 or 15(d)]

Loans - Loans (Detail) (Parenthetical)

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Loans - Loans (Detail) (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable $ 6,528,259 $ 6,251,377
Real Estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable 5,058,868 4,900,924
Real Estate | Home Equity Loans and Lines - Residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable 1,100 1,300
Real Estate | Personal Loans - Residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable $ 6,700 $ 4,100