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Derivatives - Additional Information (Detail) - USD ($)	6 Months Ended
Derivatives - Additional Information (Detail) - USD ($)	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Derivatives Fair Value [Line Items]
Amount of netting arrangement	$ 4,580,000		$ 2,180,000
Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Derivatives Fair Value [Line Items]
Fair value	348,000
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Derivatives Fair Value [Line Items]
Notional amount	100,000,000		100,000,000
Fair value	348,000		(74,000)
Not Designated as Hedging Instrument [Member]
Derivatives Fair Value [Line Items]
Gain or loss recognized on derivatives	0	$ 0
Location, Statement of Financial Position, Balance [Axis]: us-gaap:CashAndDueFromBanks \| Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Cash and securities at fair value pledged for collateral	$ 0		$ 0