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Derivatives - Additional Information (Detail) - USD ($)	9 Months Ended
Derivatives - Additional Information (Detail) - USD ($)	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Derivatives Fair Value [Line Items]
Amount of netting arrangement	$ 2,590,000		$ 6,330,000
Interest Rate Swap \| Cash Flow Hedge
Derivatives Fair Value [Line Items]
fair value	52,000
Designated as Hedging Instrument [Member] \| Interest Rate Swap \| Cash Flow Hedge
Derivatives Fair Value [Line Items]
Notional amount	100,000,000
fair value	52,000
Not Designated as Hedging Instrument [Member]
Derivatives Fair Value [Line Items]
Gain or loss recognized on derivatives	0	$ 0
Cash and Cash Equivalents [Member] \| Interest Rate Swap
Derivatives Fair Value [Line Items]
Cash and securities at fair value pledged for collateral	$ 0		$ 0