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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Impaired Loans by Class (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) $ 341 $ 424
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 341 508
Impaired Loans with a Specific Allowance, Related Allowance 28 33
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 6,912 10,820
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 9,748 13,755
Commercial Real Estate | Owner-occupied    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 3,763 3,260
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 4,902 4,091
Commercial Real Estate | Non-owner occupied residential    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 122 268
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 259 393
Commercial and industrial    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 250 3,639
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 547 4,269
Residential mortgage | First lien    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 341 424
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 341 508
Impaired Loans with a Specific Allowance, Related Allowance 28 33
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 2,294 2,204
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 3,337 3,264
Residential mortgage | Home-equity - term    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 7 10
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 10 13
Residential mortgage | Home equity - lines of credit    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 436 608
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) 653 832
Installment and other loans    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance) 0 0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance) 0 0
Impaired Loans with a Specific Allowance, Related Allowance 0 0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance) 40 17
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance) $ 40 18
Acquisition and Development | Commercial and land development    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with a Specific Allowance, Recorded Investment (Book Balance)   0
Impaired Loans with a Specific Allowance, Unpaid Principal Balance (Legal Balance)   0
Impaired Loans with a Specific Allowance, Related Allowance   0
Impaired Loans with No Specific Allowance, Recorded Investment (Book Balance)   814
Impaired Loans with No Specific Allowance, Unpaid Principal Balance (Legal Balance)   $ 875