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Loans - Summary of Information Regarding Impaired Loans (Detail) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Financing Receivable, Impaired [Line Items]    
Recorded Investment $ 7,364 $ 6,227
Reserve 0 0
Average Investment 6,172 8,758
Interest Recognized 248 337
Recorded Investment 7,364 6,227
Principal Balance 7,586 6,498
Average Investment 6,172 8,758
Interest Recognized 248 337
Commercial Real Estate [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 4,176 4,088
Principal Balance 4,176 4,089
Average Investment 3,897 5,615
Interest Recognized 111 213
Commercial Land Development [Member]    
Financing Receivable, Impaired [Line Items]    
Average Investment 0 734
Interest Recognized 0 33
Commercial Other [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 2,022 745
Principal Balance 2,022 796
Average Investment 1,009 1,478
Interest Recognized 86 35
Residential real estate and consumer First mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 1,132 1,357
Principal Balance 1,349 1,572
Average Investment 1,231 914
Interest Recognized 50 34
Residential real estate and consumer Home equity and lines of credit    
Financing Receivable, Impaired [Line Items]    
Recorded Investment 34 37
Principal Balance 39 41
Average Investment 35 17
Interest Recognized $ 1 $ 22