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Allowance For Loan Loss Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 4,790	$ 4,715
Financing Receivable, Collectively Evaluated for Impairment	477,320	451,435
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	42
Financing Receivable, Individually Evaluated for Impairment	157	2,742
Allowance for loan losses	4,790	4,757
Loans and Leases Receivable, Gross, Carrying Amount	477,477	454,177
Commercial and Industrial Loans [Member]
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	778	622
Financing Receivable, Collectively Evaluated for Impairment	63,467	59,055
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	31
Financing Receivable, Individually Evaluated for Impairment	0	31
Allowance for loan losses	778	653
Loans and Leases Receivable, Gross, Carrying Amount	63,467	59,086
Construction And Land Development Loans [Member]
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	700	734
Financing Receivable, Collectively Evaluated for Impairment	40,222	39,607
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Allowance for loan losses	700	734
Loans and Leases Receivable, Gross, Carrying Amount	40,222	39,607
Commercial Real Estate Loans, Total [Member]
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	2,218	2,115
Financing Receivable, Collectively Evaluated for Impairment	261,739	236,322
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	11
Financing Receivable, Individually Evaluated for Impairment	157	2,711
Allowance for loan losses	2,218	2,126
Loans and Leases Receivable, Gross, Carrying Amount	261,896	239,033
Residential Real Estate Loans, Total [Member]
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	946	1,071
Financing Receivable, Collectively Evaluated for Impairment	102,597	106,863
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Allowance for loan losses	946	1,071
Loans and Leases Receivable, Gross, Carrying Amount	102,597	106,863
Consumer Installment and Revolving Loans [Member]
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	148	173
Financing Receivable, Collectively Evaluated for Impairment	9,295	9,588
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Allowance for loan losses	148	173
Loans and Leases Receivable, Gross, Carrying Amount	$ 9,295	$ 9,588

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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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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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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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