Loans Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	$ 652,730	$ 633,376
Loans, Nonaccrual	723	816
Loans	657,916	642,461
30 - 59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	1,834	5,244
60 - 89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	1,397	1,885
90 Days and Over and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	1,232	1,140
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	190,021	183,624
Loans, Nonaccrual	398	594
Loans	192,617	187,320
Residential Real Estate [Member] | 30 - 59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	168	1,984
Residential Real Estate [Member] | 60 - 89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	1,075	696
Residential Real Estate [Member] | 90 Days and Over and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	955	422
Construction Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	62,764	52,807
Loans, Nonaccrual	33	41
Loans	63,245	55,322
Construction Real Estate [Member] | 30 - 59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	98	1,451
Construction Real Estate [Member] | 60 - 89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	122	1,023
Construction Real Estate [Member] | 90 Days and Over and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	228	0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	282,238	273,778
Loans, Nonaccrual	268	148
Loans	284,271	276,500
Commercial Real Estate [Member] | 30 - 59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	1,549	1,703
Commercial Real Estate [Member] | 60 - 89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	192	153
Commercial Real Estate [Member] | 90 Days and Over and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	24	718
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	44,481	47,163
Loans, Nonaccrual	24	33
Loans	44,536	47,228
Commercial [Member] | 30 - 59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	0	24
Commercial [Member] | 60 - 89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	6	8
Commercial [Member] | 90 Days and Over and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	25	0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	3,545	3,215
Loans, Nonaccrual	0	0
Loans	3,566	3,241
Consumer [Member] | 30 - 59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	19	21
Consumer [Member] | 60 - 89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	2	5
Consumer [Member] | 90 Days and Over and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	0	0
Municipal [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Current	69,681	72,789
Loans, Nonaccrual	0	0
Loans	69,681	72,850
Municipal [Member] | 30 - 59 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	0	61
Municipal [Member] | 60 - 89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	0	0
Municipal [Member] | 90 Days and Over and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans, Past Due	$ 0	$ 0