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Loan Credit Quality Analysis (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	$ 418,056	$ 411,630
Financing Receivable, Recorded Investment, Special Mention	6,669	6,683
Financing Receivable Recorded Investment, Substandard Accruing	5,617	5,892
Financing Receivable, Recorded Investment, Nonaccrual Status	1,938	2,714
Loans and Leases Receivable, Gross, Carrying Amount	432,280	426,919	$ 397,075
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	46,055	48,038
Financing Receivable, Recorded Investment, Special Mention	3,786	4,075
Financing Receivable Recorded Investment, Substandard Accruing	309	323
Financing Receivable, Recorded Investment, Nonaccrual Status	42	43
Loans and Leases Receivable, Gross, Carrying Amount	50,192	52,479	52,536
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	45,356	42,458
Financing Receivable, Recorded Investment, Special Mention	54	60
Financing Receivable Recorded Investment, Substandard Accruing	477	593
Financing Receivable, Recorded Investment, Nonaccrual Status	66	583
Loans and Leases Receivable, Gross, Carrying Amount	45,953	43,694	37,925
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	46,419	45,772
Financing Receivable, Recorded Investment, Special Mention	275	381
Financing Receivable Recorded Investment, Substandard Accruing	316	219
Financing Receivable, Recorded Investment, Nonaccrual Status	0	230
Loans and Leases Receivable, Gross, Carrying Amount	47,010	46,602
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	160,074	155,423
Financing Receivable, Recorded Investment, Special Mention	35	36
Financing Receivable Recorded Investment, Substandard Accruing	467	272
Financing Receivable, Recorded Investment, Nonaccrual Status	1,734	1,520
Loans and Leases Receivable, Gross, Carrying Amount	162,310	157,251
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	206,493	201,195
Financing Receivable, Recorded Investment, Special Mention	310	417
Financing Receivable Recorded Investment, Substandard Accruing	783	491
Financing Receivable, Recorded Investment, Nonaccrual Status	1,734	1,750
Loans and Leases Receivable, Gross, Carrying Amount	209,320	203,853	182,871
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	65,003	64,502
Financing Receivable, Recorded Investment, Special Mention	2,490	1,964
Financing Receivable Recorded Investment, Substandard Accruing	2,854	3,218
Financing Receivable, Recorded Investment, Nonaccrual Status	96	325
Loans and Leases Receivable, Gross, Carrying Amount	70,443	70,009
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	45,519	45,399
Financing Receivable, Recorded Investment, Special Mention	0	112
Financing Receivable Recorded Investment, Substandard Accruing	1,084	1,153
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	46,603	46,664
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	110,522	109,901
Financing Receivable, Recorded Investment, Special Mention	2,490	2,076
Financing Receivable Recorded Investment, Substandard Accruing	3,938	4,371
Financing Receivable, Recorded Investment, Nonaccrual Status	96	325
Loans and Leases Receivable, Gross, Carrying Amount	117,046	116,673	111,265
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Pass	9,630	10,038
Financing Receivable, Recorded Investment, Special Mention	29	55
Financing Receivable Recorded Investment, Substandard Accruing	110	114
Financing Receivable, Recorded Investment, Nonaccrual Status	0	13
Loans and Leases Receivable, Gross, Carrying Amount	$ 9,769	$ 10,220	$ 12,478

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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