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Derivative Financial Instruments - Carrying Amount and Cumulative Basis Adjustments (Detail) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Carrying Amount of the Hedged Assets/ Liabilities $ 451,189 $ 437,759
Cumulative Amount of Fair Value Hedging Adjustment Included in Carrying Amount $ 7,834 $ (4,424)