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Loans and Allowance for Loan Losses (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Loan
Sep. 30, 2019
USD ($)
Loan
Borrower
Sep. 30, 2018
Contract
Dec. 31, 2017
USD ($)
Accounts Notes And Loans Receivable [Line Items]        
Reserve previously allocated to loans       $ 625,000
Period after which loans considered nonperforming   90 days    
Number of loans modified as TDRs 0 0 7  
Number of commercial loan borrowers | Borrower   1    
Commercial        
Accounts Notes And Loans Receivable [Line Items]        
Decrease in commercial loan balances   $ 40,900,000    
Financing receivables, maturity   First quarter of 2019    
Charge off amount recorded as loan discount   $ 1,100,000    
Number of loans modified as TDRs | Contract     7