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Fair Value Measurement - Quantitative Information about (Level 3) Fair Value Measurements for Financial Instruments Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Foreclosed assets (Residential real estate)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 770  
Individually evaluated loans    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 5,216 $ 3,683