Derivatives and Hedging Activities - Schedule of Fair Value of Derivative Financial Instruments as well as their Classification on Consolidated Balance Sheets (Detail) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Derivatives Fair Value [Line Items]
Total derivative assets	$ 2,410,000	$ 2,719,000
Not Designated as Hedging Instrument
Derivatives Fair Value [Line Items]
Total derivative assets	2,410,000	2,579,000
Total derivative liabilities	2,392,000	2,568,000
Not Designated as Hedging Instrument \| Interest Rate Products
Derivatives Fair Value [Line Items]
Notional Amount	59,859,000	61,350,000
Total derivative assets	2,410,000	2,579,000
Total derivative liabilities	$ 2,392,000	2,568,000
Designated as Hedging Instrument
Derivatives Fair Value [Line Items]
Total derivative assets		140,000
Designated as Hedging Instrument \| Interest Rate Products
Derivatives Fair Value [Line Items]
Notional Amount		175,000,000
Total derivative assets		$ 140,000

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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