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Loan Credit Quality Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	$ 425,223	$ 419,974
Financing Receivable, Recorded Investment, Special Mention	3,506	3,319
Financing Receivable Recorded Investment, Substandard Accruing	6,936	5,843
Financing Receivable, Recorded Investment, Nonaccrual Status	2,255	2,370
Loans and Leases Receivable, Gross, Carrying Amount	437,920	431,506	$ 431,249
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	50,148	49,558
Financing Receivable, Recorded Investment, Special Mention	183	22
Financing Receivable Recorded Investment, Substandard Accruing	609	233
Financing Receivable, Recorded Investment, Nonaccrual Status	34	37
Loans and Leases Receivable, Gross, Carrying Amount	50,974	49,850	50,190
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	45,912	41,165
Financing Receivable, Recorded Investment, Special Mention	188	113
Financing Receivable Recorded Investment, Substandard Accruing	286	340
Financing Receivable, Recorded Investment, Nonaccrual Status	0	32
Loans and Leases Receivable, Gross, Carrying Amount	46,386	41,650	49,346
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	38,191	48,788
Financing Receivable, Recorded Investment, Special Mention	402	414
Financing Receivable Recorded Investment, Substandard Accruing	347	405
Financing Receivable, Recorded Investment, Nonaccrual Status	0	138
Loans and Leases Receivable, Gross, Carrying Amount	38,940	49,745
Commercial Real Estate Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	47,206	46,998
Financing Receivable, Recorded Investment, Special Mention	0	0
Financing Receivable Recorded Investment, Substandard Accruing	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	47,206	46,998
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	131,739	121,326
Financing Receivable, Recorded Investment, Special Mention	0	32
Financing Receivable Recorded Investment, Substandard Accruing	1,181	449
Financing Receivable, Recorded Investment, Nonaccrual Status	1,797	1,889
Loans and Leases Receivable, Gross, Carrying Amount	134,717	123,696
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	217,136	217,112
Financing Receivable, Recorded Investment, Special Mention	402	446
Financing Receivable Recorded Investment, Substandard Accruing	1,528	854
Financing Receivable, Recorded Investment, Nonaccrual Status	1,797	2,027
Loans and Leases Receivable, Gross, Carrying Amount	220,863	220,439	208,825
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	57,975	59,450
Financing Receivable, Recorded Investment, Special Mention	2,576	2,613
Financing Receivable Recorded Investment, Substandard Accruing	3,405	3,278
Financing Receivable, Recorded Investment, Nonaccrual Status	406	223
Loans and Leases Receivable, Gross, Carrying Amount	64,362	65,564
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	44,812	44,109
Financing Receivable, Recorded Investment, Special Mention	103	105
Financing Receivable Recorded Investment, Substandard Accruing	1,011	1,048
Financing Receivable, Recorded Investment, Nonaccrual Status	0	29
Loans and Leases Receivable, Gross, Carrying Amount	45,926	45,291
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	102,787	103,559
Financing Receivable, Recorded Investment, Special Mention	2,679	2,718
Financing Receivable Recorded Investment, Substandard Accruing	4,416	4,326
Financing Receivable, Recorded Investment, Nonaccrual Status	406	252
Loans and Leases Receivable, Gross, Carrying Amount	110,288	110,855	113,763
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	9,240	8,580
Financing Receivable, Recorded Investment, Special Mention	54	20
Financing Receivable Recorded Investment, Substandard Accruing	97	90
Financing Receivable, Recorded Investment, Nonaccrual Status	18	22
Loans and Leases Receivable, Gross, Carrying Amount	$ 9,409	$ 8,712	$ 9,125

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Recorded Investment
-URI http://asc.fasb.org/extlink&oid=65880944

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5111-111524

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 310
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