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Loans and Leases (Narrative) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
loan
item
Mar. 31, 2019
USD ($)
loan
Dec. 31, 2019
USD ($)
loan
item
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Deferred loan costs $ 3,000   $ 3,000
Mortgages serviced 299,000   302,300
Mortgage servicing rights 1,000   1,000
Allowance for impaired loans 719   908
Impaired loans $ 4,642   4,665
Number of loans classified as TDRs | loan 0 0  
Number of contracts modified by TDR with subsequent default | loan 0 0  
Direct finance lease receivable $ 5,000   4,700
Direct finance lease residual value 11,400   10,800
Troubled Debt Status [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for impaired loans 200 $ 200  
Accruing TDR Balance [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructuring balance 1,000   1,000
Non-Accrual Status [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Troubled Debt Restructuring balance 600   600
Financing receivable, net $ 3,600   $ 3,700
Number of loans classified as TDRs | loan 2   2
Number of unrelated borrowers that had loans modified in a TDR | item 2   2