Loans (Troubled Debt Restructurings on Financing Receivables) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019 USD ($) Loan	Dec. 31, 2018 USD ($) Loan
Financing Receivable, Impaired [Line Items]
TDRs | $	$ 2,073	$ 6,705
Less: TDRs included in non-accrual loans | $	(1,418)	(29)
Accrual TDR loans | $	$ 655	$ 6,676
Number of TDR loans | Loan	8	13
Number of non-accrual TDR loans | Loan	(2)	(1)
Number of accrual TDR loans | Loan	6	12
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
TDRs | $	$ 1,438	$ 5,612
Number of TDR loans | Loan	4	7
Residential First Mortgages Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
TDRs | $	$ 64	$ 66
Number of TDR loans | Loan	1	1
Residential Rentals Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
TDRs | $	$ 0	$ 216
Number of TDR loans | Loan	0	1
Construction And Land Development Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
TDRs | $	$ 0	$ 729
Number of TDR loans | Loan	0	2
Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
TDRs | $	$ 0	$ 53
Number of TDR loans | Loan	0	1
Commercial Equipment Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
TDRs | $	$ 571	$ 29
Number of TDR loans | Loan	3	1