Annual report [Section 13 and 15(d), not S-K Item 405]

Loans - Loans, Net of Allowance for Credit Losses (Parenthetical) (Detail)

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Loans - Loans, Net of Allowance for Credit Losses (Parenthetical) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans $ 6,563,368 $ 6,251,377
Real Estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans 5,079,977 4,900,924
Real Estate | Home Equity Loans and Lines - Residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans 1,000 1,300
Real Estate | Personal Loans - Residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total loans $ 3,800 $ 4,100