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Allowance For Loan Loss Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 4,747		$ 4,943
Financing Receivable, Collectively Evaluated for Impairment	456,377		435,939
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3		22
Financing Receivable, Individually Evaluated for Impairment	877		1,981
Allowance for loan losses	4,750	$ 4,757	4,965
Loans and Leases Receivable, Gross, Carrying Amount	457,254	454,177	437,920
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	600		677
Financing Receivable, Collectively Evaluated for Impairment	52,921		50,974
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	600		677
Loans and Leases Receivable, Gross, Carrying Amount	52,921	59,086	50,974
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	787		874
Financing Receivable, Collectively Evaluated for Impairment	42,675		46,386
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	787		874
Loans and Leases Receivable, Gross, Carrying Amount	42,675	39,607	46,386
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	2,194		2,099
Financing Receivable, Collectively Evaluated for Impairment	245,252		218,882
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	3		22
Financing Receivable, Individually Evaluated for Impairment	877		1,981
Allowance for loan losses	2,197		2,121
Loans and Leases Receivable, Gross, Carrying Amount	246,129	239,033	220,863
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	1,017		1,119
Financing Receivable, Collectively Evaluated for Impairment	105,705		110,288
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	1,017		1,119
Loans and Leases Receivable, Gross, Carrying Amount	105,705	106,863	110,288
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	149		174
Financing Receivable, Collectively Evaluated for Impairment	9,824		9,409
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	149		174
Loans and Leases Receivable, Gross, Carrying Amount	$ 9,824	$ 9,588	$ 9,409

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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
-Topic 310
-SubTopic 10
-Section 50
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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