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Loans Past Due Analysis (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	$ 427,094	$ 422,794
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	2,042	1,411
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	429,136	424,205
Financing Receivable, Recorded Investment, Nonaccrual Status	2,370	2,714
Total Loans	431,506	426,919
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	49,747	52,387
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	66	49
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	49,813	52,436
Financing Receivable, Recorded Investment, Nonaccrual Status	37	43
Total Loans	49,850	52,479
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	41,223	43,111
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	395	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	41,618	43,111
Financing Receivable, Recorded Investment, Nonaccrual Status	32	583
Total Loans	41,650	43,694
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	49,564	46,372
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	43	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	49,607	46,372
Financing Receivable, Recorded Investment, Nonaccrual Status	138	230
Total Loans	49,745	46,602
Commercial Real Estate Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	46,998	45,264
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	46,998	45,264
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Total Loans	46,998	45,264
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	121,608	110,467
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	199	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	121,807	110,467
Financing Receivable, Recorded Investment, Nonaccrual Status	1,889	1,520
Total Loans	123,696	111,987
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	218,170	202,103
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	242	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	218,412	202,103
Financing Receivable, Recorded Investment, Nonaccrual Status	2,027	1,750
Total Loans	220,439	203,853
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	64,059	68,579
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	1,282	1,105
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	65,341	69,684
Financing Receivable, Recorded Investment, Nonaccrual Status	223	325
Total Loans	65,564	70,009
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	45,243	46,435
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	19	229
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	45,262	46,664
Financing Receivable, Recorded Investment, Nonaccrual Status	29	0
Total Loans	45,291	46,664
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	109,302	115,014
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	1,301	1,334
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	110,603	116,348
Financing Receivable, Recorded Investment, Nonaccrual Status	252	325
Total Loans	110,855	116,673
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	8,652	10,179
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	38	28
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	8,690	10,207
Financing Receivable, Recorded Investment, Nonaccrual Status	22	13
Total Loans	$ 8,712	$ 10,220

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