Quarterly report [Sections 13 or 15(d)]

Derivatives and Hedging Activities - Schedule of Fair Value of Derivative Financial Instruments as well as their Classification on Consolidated Balance Sheets (Detail)

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Derivatives and Hedging Activities - Schedule of Fair Value of Derivative Financial Instruments as well as their Classification on Consolidated Balance Sheets (Detail) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Derivatives Fair Value [Line Items]    
Total derivative assets $ 2,377,000 $ 2,719,000
Not Designated as Hedging Instrument    
Derivatives Fair Value [Line Items]    
Total derivative assets 2,334,000 2,579,000
Total derivative liabilities 2,318,000 2,568,000
Not Designated as Hedging Instrument | Interest Rate Products    
Derivatives Fair Value [Line Items]    
Notional Amount 60,614,000 61,350,000
Total derivative assets 2,334,000 2,579,000
Total derivative liabilities 2,318,000 2,568,000
Designated as Hedging Instrument    
Derivatives Fair Value [Line Items]    
Total derivative assets 43,000 140,000
Designated as Hedging Instrument | Interest Rate Products    
Derivatives Fair Value [Line Items]    
Notional Amount 175,000,000 175,000,000
Total derivative liabilities $ 43,000 $ 140,000