Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net interest income from external sources	$ 6,749	$ 5,646
Other income from external sources	2,477	2,524
Depreciation and amortization	272	258
Income before income taxes	2,842	2,349
Income tax expense	831	775
Total assets	872,282	716,772	$ 848,728
Banking And Financial Services [Member]
Segment Reporting Information [Line Items]
Net interest income from external sources	6,749	5,646
Other income from external sources	730	786
Depreciation and amortization	266	252
Income before income taxes	2,022	1,514
Income tax expense	503	441
Total assets	865,832	709,893
Insurance Services [Member]
Segment Reporting Information [Line Items]
Other income from external sources	1,747	1,738
Depreciation and amortization	6	6
Income before income taxes	820	835
Income tax expense	328	334
Total assets	$ 6,450	$ 6,879
Statutory tax rate	40.00%	40.00%