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Loans Past Due Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	$ 475,772	$ 475,193
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	682	2,106
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	476,454	477,299
Financing Receivable, Recorded Investment, Nonaccrual Status	131	178
Loans and Leases Receivable, Gross, Carrying Amount	476,585	477,477	$ 457,254
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	54,198	63,367
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	109	100
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	54,307	63,467
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	54,307	63,467	52,921
Construction And Land Development Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	45,044	39,997
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	351	225
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	45,395	40,222
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	45,395	40,222	42,675
Commercial Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	61,187	56,413
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	61,187	56,413
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	61,187	56,413
Commercial Real Estate Multifamily [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	44,022	40,455
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	44,022	40,455
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	44,022	40,455
Commercial Real Estate Other Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	163,291	165,028
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	163,291	165,028
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	163,291	165,028
Commercial Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	268,500	261,896
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	268,500	261,896
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	268,500	261,896	246,129
Residential Real Estate Consumer Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	53,335	54,446
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	214	1,599
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	53,549	56,045
Financing Receivable, Recorded Investment, Nonaccrual Status	131	178
Loans and Leases Receivable, Gross, Carrying Amount	53,680	56,223
Residential Real Estate Investment Property Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	45,612	46,233
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	0	141
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	45,612	46,374
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	45,612	46,374
Residential Real Estate Loans, Total [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	98,947	100,679
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	214	1,740
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	99,161	102,419
Financing Receivable, Recorded Investment, Nonaccrual Status	131	178
Loans and Leases Receivable, Gross, Carrying Amount	99,292	102,597	105,705
Consumer Installment and Revolving Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Current	9,083	9,254
Financing Receivable, Recorded Investment, 30 To 89 Days Past Due	8	41
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0	0
Financing Receivable, Recorded Investment, Total Still Accruing	9,091	9,295
Financing Receivable, Recorded Investment, Nonaccrual Status	0	0
Loans and Leases Receivable, Gross, Carrying Amount	$ 9,091	$ 9,295	$ 9,824

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