Segment Reporting (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($) Segment	Mar. 31, 2016 USD ($)	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	$ 7,725	$ 7,365
Income from fiduciary activities	966	901
Other income	2,197	2,764
Total operating income	10,888	11,030
Expenses
Interest expense	588	719
Provision for loan losses	650	150	$ 1,930
Salaries and employee benefits	5,097	5,154
Other expenses	3,609	3,937
Total operating expenses	9,944	9,960
Income before income taxes	944	1,070
Income tax expense (benefit)	2	49
Net income	942	1,021
Property, Plant and Equipment, Additions	250	371
Total assets	922,776	856,847	$ 902,966
Bank [Member]
Revenues
Interest and dividend income	7,708	7,351
Income from fiduciary activities	0	0
Other income	1,955	2,503
Total operating income	9,663	9,854
Expenses
Interest expense	588	719
Provision for loan losses	650	150
Salaries and employee benefits	4,255	4,362
Other expenses	3,325	3,615
Total operating expenses	8,818	8,846
Income before income taxes	845	1,008
Income tax expense (benefit)	(32)	28
Net income	877	980
Property, Plant and Equipment, Additions	250	367
Total assets	917,101	851,716
Trust [Member]
Revenues
Interest and dividend income	17	14
Income from fiduciary activities	966	901
Other income	257	276
Total operating income	1,240	1,191
Expenses
Interest expense	0	0
Provision for loan losses	0	0
Salaries and employee benefits	727	678
Other expenses	264	261
Total operating expenses	991	939
Income before income taxes	249	252
Income tax expense (benefit)	85	86
Net income	164	166
Property, Plant and Equipment, Additions	0	4
Total assets	5,880	5,865
Unconsolidated Parent [Member]
Revenues
Interest and dividend income	1,041	1,146
Income from fiduciary activities	0	0
Other income	50	50
Total operating income	1,091	1,196
Expenses
Interest expense	0	0
Provision for loan losses	0	0
Salaries and employee benefits	115	114
Other expenses	85	126
Total operating expenses	200	240
Income before income taxes	891	956
Income tax expense (benefit)	(51)	(65)
Net income	942	1,021
Property, Plant and Equipment, Additions	0	0
Total assets	95,127	94,236
Eliminations [Member]
Revenues
Interest and dividend income	(1,041)	(1,146)
Income from fiduciary activities	0	0
Other income	(65)	(65)
Total operating income	(1,106)	(1,211)
Expenses
Interest expense	0	0
Provision for loan losses	0	0
Salaries and employee benefits	0	0
Other expenses	(65)	(65)
Total operating expenses	(65)	(65)
Income before income taxes	(1,041)	(1,146)
Income tax expense (benefit)	0	0
Net income	(1,041)	(1,146)
Property, Plant and Equipment, Additions	0	0
Total assets	$ (95,332)	$ (94,970)