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Loans and Allowance for Loan Losses - Summary of Information Pertaining to Impaired Loans (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance $ 617 $ 1,022
Recorded Investment With No Allowance 411 712
Recorded Investment With Allowance 206  
Total Recorded Investment 617 712
Related Allowance 166  
Commercial and Industrial Loans    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 561 834
Recorded Investment With No Allowance 355 537
Recorded Investment With Allowance 206  
Total Recorded Investment 561 537
Related Allowance 166  
Residential Real Estate    
Financing Receivable Impaired [Line Items]    
Unpaid Contractual Principal Balance 56 188
Recorded Investment With No Allowance 56 175
Total Recorded Investment $ 56 $ 175