Loans (Troubled Debt Restructurings on Financing Receivables) (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) numberOfTDRLoans	Dec. 31, 2019 USD ($) numberOfTDRLoans
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 2,035	$ 2,049
Less: TDRs included in non-accrual loans | $	1,394	1,399
Accrual TDR loans | $	$ 641	$ 650
Number of TDR loans | numberOfTDRLoans	8	8
Number of non-accrual TDR loans | numberOfTDRLoans	3	3
Number of accrual TDR loans | numberOfTDRLoans	5	5
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 1,418	$ 1,420
Number of TDR loans | numberOfTDRLoans	3	3
Residential First Mortgages Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 63	$ 64
Number of TDR loans | numberOfTDRLoans	1	1
Commercial Equipment Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Financing receivable post modification recorded investment | $	$ 554	$ 565
Number of TDR loans | numberOfTDRLoans	4	4