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Other Operating Income and Expense - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Finite Lived Intangible Assets [Line Items]        
Revenue, remaining performance obligation, amount $ 0   $ 0  
Contract with customer, liability, total 0   0  
Service and Other Charges on Deposit Accounts, Mortgage Fees From Secondary Market Transactions at The Bank ATM Fee Income and Other Noninterest Income [Member]        
Finite Lived Intangible Assets [Line Items]        
Revenue from Contract with Customer, Including Assessed Tax $ 600 $ 900 $ 2,000 $ 2,400