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Loans and Allowance for Loan Losses - Summary of Impaired Financing Receivables (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Financing Receivable Impaired [Line Items]    
Impaired financing receivable, with no specific allowance recorded, recorded investment $ 9,733 $ 2,331
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 10,388 2,835
Impaired financing receivable, related allowance 879 144
Impaired financing receivable, with no specific allowance recorded, average recorded investment 9,240 2,991
Impaired financing receivable, with an allowance recorded, interest income recognized 390 6
Commercial and Industrial [Member]    
Financing Receivable Impaired [Line Items]    
Impaired financing receivable, with no specific allowance recorded, recorded investment 4,612 234
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 4,612 234
Impaired financing receivable, related allowance 836 144
Impaired financing receivable, with no specific allowance recorded, average recorded investment 4,369 362
Impaired financing receivable, with an allowance recorded, interest income recognized 260
Real Estate [Member] | Mortgage, Residential [Member]    
Financing Receivable Impaired [Line Items]    
Impaired financing receivable, with no specific allowance recorded, recorded investment 1,400 1,645
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 1,400 2,030
Impaired financing receivable, related allowance 42
Impaired financing receivable, with no specific allowance recorded, average recorded investment 700 2,091
Impaired financing receivable, with an allowance recorded, interest income recognized 23 4
Real Estate [Member] | Commercial Construction [Member]    
Financing Receivable Impaired [Line Items]    
Impaired financing receivable, with no specific allowance recorded, recorded investment 527  
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 527  
Impaired financing receivable, related allowance  
Impaired financing receivable, with no specific allowance recorded, average recorded investment 535  
Impaired financing receivable, with an allowance recorded, interest income recognized 37  
Real Estate [Member] | Mortgage, Commercial [Member]    
Financing Receivable Impaired [Line Items]    
Impaired financing receivable, with no specific allowance recorded, recorded investment 3,194 452
Impaired financing receivable, with no specific allowance recorded, unpaid principal balance 3,849 571
Impaired financing receivable, related allowance 1
Impaired financing receivable, with no specific allowance recorded, average recorded investment 3,636 538
Impaired financing receivable, with an allowance recorded, interest income recognized $ 70 $ 2