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Loans and Credit Quality - Summary of Trouble Debt Restructurings that Subsequently Defaulted (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
contract
Dec. 31, 2019
contract
Dec. 31, 2018
USD ($)
contract
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of Contracts | contract 0 0 6
Recorded Investment | $     $ 2,860
Asset Quality Rating - Substandard | Commercial      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of Contracts | contract     4
Recorded Investment | $     $ 1,166
Asset Quality Rating - Substandard | Real estate term owner occupied      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of Contracts | contract     2
Recorded Investment | $     $ 1,694