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Allowance For Loan Loss Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Financing Receivable Allowance For Credit Loss Additional Information [Line Items]
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	$ 4,542		$ 4,167
Financing Receivable, Collectively Evaluated for Impairment	425,956		418,786
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	36		960
Financing Receivable, Individually Evaluated for Impairment	1,786		4,405
Allowance for loan losses	4,578	$ 4,289	5,127
Loans and Leases Receivable, Gross, Carrying Amount	427,742	426,919	423,191
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	515		504
Financing Receivable, Collectively Evaluated for Impairment	50,858		47,869
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	23		56
Allowance for loan losses	515		504
Loans and Leases Receivable, Gross, Carrying Amount	50,881	52,479	47,925
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	673		627
Financing Receivable, Collectively Evaluated for Impairment	43,959		40,999
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	45		593
Allowance for loan losses	673		627
Loans and Leases Receivable, Gross, Carrying Amount	44,004	43,694	41,592
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	2,196		1,719
Financing Receivable, Collectively Evaluated for Impairment	209,840		197,693
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	36		960
Financing Receivable, Individually Evaluated for Impairment	1,718		3,756
Allowance for loan losses	2,232		2,679
Loans and Leases Receivable, Gross, Carrying Amount	211,558	203,853	201,449
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	1,020		1,103
Financing Receivable, Collectively Evaluated for Impairment	112,303		117,863
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	1,020		1,103
Loans and Leases Receivable, Gross, Carrying Amount	112,303	116,673	117,863
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	138		214
Financing Receivable, Collectively Evaluated for Impairment	8,996		14,362
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Financing Receivable, Individually Evaluated for Impairment	0		0
Allowance for loan losses	138		214
Loans and Leases Receivable, Gross, Carrying Amount	$ 8,996	$ 10,220	$ 14,362

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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
-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section L
-Subsection 1

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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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