Allowance for Loan Losses Composition of Allowance for Loans Losses, by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	$ 2,213	$ 2,308	$ 1,812
Allowance for Loans Evaluated Collectively for Impairment	9,426	8,924	8,917
Total Allowance for Loan Losses	11,639	11,232	10,729	$ 10,138
Commercial \| Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	251	260	224
Allowance for Loans Evaluated Collectively for Impairment	3,491	3,307	3,648
Total Allowance for Loan Losses	3,742	3,567	3,872	3,988
Commercial \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0	0	0
Allowance for Loans Evaluated Collectively for Impairment	365	255	434
Total Allowance for Loan Losses	365	255	434	396
Commercial \| Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	1,273	1,696	1,309
Allowance for Loans Evaluated Collectively for Impairment	2,056	1,845	2,049
Total Allowance for Loan Losses	3,329	3,541	3,358	1,780
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0	0	0
Allowance for Loans Evaluated Collectively for Impairment	27	24	20
Total Allowance for Loan Losses	27	24	20	18
Residential \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0	0	0
Allowance for Loans Evaluated Collectively for Impairment	25	34	36
Total Allowance for Loan Losses	25	34	36	44
Residential \| Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	237	335	255
Allowance for Loans Evaluated Collectively for Impairment	787	900	875
Total Allowance for Loan Losses	1,024	1,235	1,130	1,288
Home Equity LIne of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	447	17	24
Allowance for Loans Evaluated Collectively for Impairment	631	713	668
Total Allowance for Loan Losses	1,078	730	692	807
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	5	0	0
Allowance for Loans Evaluated Collectively for Impairment	862	630	545
Total Allowance for Loan Losses	867	630	545	559
Unallocated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Loans Evaluated Individually for Impairment	0	0	0
Allowance for Loans Evaluated Collectively for Impairment	1,182	1,216	642
Total Allowance for Loan Losses	$ 1,182	$ 1,216	$ 642	$ 1,258

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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