Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Segment	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting [Abstract]
Number of operating segments | Segment			3
Description of operating segments			The Company's reportable segments are strategic business units that offer different products and services. They are managed separately because each segment appeals to different markets and, accordingly, requires different technologies and marketing strategies.
Revenues
Interest and dividend income	$ 8,568	$ 7,436	$ 24,354	$ 22,236
Income from fiduciary activities	903	858	2,820	2,636
Other income	2,458	2,469	7,795	7,642
Total operating income	11,929	10,763	34,969	32,514
Expenses
Interest expense	837	633	2,098	1,934
Provision for loan losses	1,275	(100)	2,925	1,300	$ 1,930
Salaries and employee benefits	5,104	5,063	15,650	15,107
Other expenses	4,012	3,626	11,442	11,158
Total operating expenses	11,228	9,222	32,115	29,499
Income before Income Taxes	701	1,541	2,854	3,015
Income tax expense (benefit)	(56)	212	(6)	113
Net income	757	1,329	2,860	2,902
Property, Plant and Equipment, Additions	66	234	510	710
Total assets	954,497	905,756	954,497	905,756	$ 902,966
Bank [Member]
Revenues
Interest and dividend income	8,550	7,420	24,300	22,191
Income from fiduciary activities	0	0	0	0
Other income	2,275	2,277	7,133	6,954
Total operating income	10,825	9,697	31,433	29,145
Expenses
Interest expense	837	633	2,097	1,934
Provision for loan losses	1,275	(100)	2,925	1,300
Salaries and employee benefits	4,343	4,296	13,252	12,782
Other expenses	3,664	3,114	10,460	9,913
Total operating expenses	10,119	7,943	28,734	25,929
Income before Income Taxes	706	1,754	2,699	3,216
Income tax expense (benefit)	(55)	284	(60)	181
Net income	761	1,470	2,759	3,035
Property, Plant and Equipment, Additions	60	234	504	706
Total assets	948,377	900,160	948,377	900,160
Trust [Member]
Revenues
Interest and dividend income	18	16	52	45
Income from fiduciary activities	903	858	2,820	2,636
Other income	198	207	708	734
Total operating income	1,119	1,081	3,580	3,415
Expenses
Interest expense	0	0	0	0
Provision for loan losses	0	0	0	0
Salaries and employee benefits	657	665	2,068	2,022
Other expenses	253	262	766	774
Total operating expenses	910	927	2,834	2,796
Income before Income Taxes	209	154	746	619
Income tax expense (benefit)	72	53	255	211
Net income	137	101	491	408
Property, Plant and Equipment, Additions	6	0	6	4
Total assets	6,141	5,814	6,141	5,814
Unconsolidated Parent [Member]
Revenues
Interest and dividend income	898	1,572	3,251	3,443
Income from fiduciary activities	0	0	0	0
Other income	50	50	150	150
Total operating income	948	1,622	3,401	3,593
Expenses
Interest expense	0	0	0	0
Provision for loan losses	0	0	0	0
Salaries and employee benefits	104	102	330	303
Other expenses	160	315	412	667
Total operating expenses	264	417	742	970
Income before Income Taxes	684	1,205	2,659	2,623
Income tax expense (benefit)	(73)	(125)	(201)	(279)
Net income	757	1,330	2,860	2,902
Property, Plant and Equipment, Additions	0	0	0	0
Total assets	97,645	96,467	97,645	96,467
Eliminations [Member]
Revenues
Interest and dividend income	(898)	(1,572)	(3,249)	(3,443)
Income from fiduciary activities	0	0	0	0
Other income	(65)	(65)	(196)	(196)
Total operating income	(963)	(1,637)	(3,445)	(3,639)
Expenses
Interest expense	0	0	1	0
Provision for loan losses	0	0	0	0
Salaries and employee benefits	0	0	0	0
Other expenses	(65)	(65)	(196)	(196)
Total operating expenses	(65)	(65)	(195)	(196)
Income before Income Taxes	(898)	(1,572)	(3,250)	(3,443)
Income tax expense (benefit)	0	0	0	0
Net income	(898)	(1,572)	(3,250)	(3,443)
Property, Plant and Equipment, Additions	0	0	0	0
Total assets	$ (97,666)	$ (96,685)	$ (97,666)	$ (96,685)