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Loans - Summary of Impaired Loans by Loan Portfolio Class (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment $ 4,442 $ 4,759
Impaired Loans with Allowance: Unpaid Principal Balance 4,442 4,759
Impaired Loans with Allowance: Related Allowance 2,106 1,382
Impaired Loans with No Allowance: Recorded Investment 6,903 5,962
Impaired Loans with No Allowance: Unpaid Principal Balance 6,903 5,962
Commercial and industrial    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment 2,739 2,031
Impaired Loans with Allowance: Unpaid Principal Balance 2,739 2,031
Impaired Loans with Allowance: Related Allowance 1,954 1,224
Impaired Loans with No Allowance: Recorded Investment 0 0
Impaired Loans with No Allowance: Unpaid Principal Balance 0 0
Commercial real estate    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment 1,703 2,728
Impaired Loans with Allowance: Unpaid Principal Balance 1,703 2,728
Impaired Loans with Allowance: Related Allowance 152 158
Impaired Loans with No Allowance: Recorded Investment 6,802 5,861
Impaired Loans with No Allowance: Unpaid Principal Balance 6,802 5,861
Commercial real estate construction    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment 0 0
Impaired Loans with Allowance: Unpaid Principal Balance 0 0
Impaired Loans with Allowance: Related Allowance 0 0
Impaired Loans with No Allowance: Recorded Investment 0 0
Impaired Loans with No Allowance: Unpaid Principal Balance 0 0
Residential mortgage    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment 0 0
Impaired Loans with Allowance: Unpaid Principal Balance 0 0
Impaired Loans with Allowance: Related Allowance 0 0
Impaired Loans with No Allowance: Recorded Investment 101 101
Impaired Loans with No Allowance: Unpaid Principal Balance 101 101
Home equity lines of credit    
Financing Receivable, Impaired [Line Items]    
Impaired Loans with Allowance: Recorded Investment 0 0
Impaired Loans with Allowance: Unpaid Principal Balance 0 0
Impaired Loans with Allowance: Related Allowance 0 0
Impaired Loans with No Allowance: Recorded Investment 0 0
Impaired Loans with No Allowance: Unpaid Principal Balance $ 0 $ 0