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Derivative Financial Instruments - Summary of Interest Rate Swap Derivatives Designated as Fair Value Accounting Hedges of Fixed-rate Receivables (Detail) - Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Value $ 100,000,000 $ 100,000,000
Weighted Average Remaining Maturity (years) 2 years 7 months 6 days 3 years 7 months 6 days
Fair Value $ (976,000) $ (2,679,000)
Pay 4.47% 4.47%
Investment, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Loans [Member]    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Notional Value $ 100,000,000 $ 100,000,000
Weighted Average Remaining Maturity (years) 2 years 7 months 6 days 3 years 7 months 6 days
Fair Value $ (976,000) $ (2,679,000)
Pay 4.47% 4.47%
Investment, Variable Interest Rate, Type [Extensible Enumeration] us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember us-gaap:SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember