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Derivatives and Hedging Activities - Summary of Balance Sheet Related to Cumulative Basis Adjustment for Fair Value Hedges (Detail) - Loans [Member] - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Derivatives Fair Value [Line Items]
Carrying Amount of Hedged Assets/(Liabilities)	$ 25,060	$ 24,957
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets/(Liabilities)	$ 60	$ (43)

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Amount of asset hedged in fair value hedging relationship.

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Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk.

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