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Allowance For Loan Loss Additional Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 4,808		$ 4,696
Financing Receivable, Collectively Evaluated for Impairment	473,173		441,952
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		36
Financing Receivable, Individually Evaluated for Impairment	0		2,361
Allowance for loan losses	4,808	$ 4,790	4,732
Loans and Leases Receivable, Gross, Carrying Amount	473,173	477,477	444,313
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	686		694
Financing Receivable, Collectively Evaluated for Impairment	50,898		57,847
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		30
Financing Receivable, Individually Evaluated for Impairment	0		30
Allowance for loan losses	686		724
Loans and Leases Receivable, Gross, Carrying Amount	50,898	63,467	57,877
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	773		670
Financing Receivable, Collectively Evaluated for Impairment	44,931		35,910
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	773		670
Loans and Leases Receivable, Gross, Carrying Amount	44,931	40,222	35,910
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	2,251		2,113
Financing Receivable, Collectively Evaluated for Impairment	265,149		232,014
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		6
Financing Receivable, Individually Evaluated for Impairment	0		2,331
Allowance for loan losses	2,251		2,119
Loans and Leases Receivable, Gross, Carrying Amount	265,149	261,896	234,345
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	930		1,053
Financing Receivable, Collectively Evaluated for Impairment	103,631		106,496
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	930		1,053
Loans and Leases Receivable, Gross, Carrying Amount	103,631	102,597	106,496
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	168		166
Financing Receivable, Collectively Evaluated for Impairment	8,564		9,685
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	168		166
Loans and Leases Receivable, Gross, Carrying Amount	$ 8,564	$ 9,295	$ 9,685

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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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