Loans Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$ 591,134	$ 586,452	$ 537,959
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	2,401	0	17,831
Substandard
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	33,128	34,211	26,136
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	789	807
Performing
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	1,604,001	1,570,571	1,407,293
Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	4,544	4,192	3,011
Commercial | Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	125,918	129,584	107,838
Commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	133	0	17,220
Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	7,225	7,306	2,615
Commercial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	0	0
Commercial Real Estate Portfolio Segment | Satisfactory
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	465,216	456,868	430,121
Commercial Real Estate Portfolio Segment | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	2,268	0	611
Commercial Real Estate Portfolio Segment | Substandard
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	25,903	26,905	23,521
Commercial Real Estate Portfolio Segment | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	0	789	807
Consumer Loans Financing | Performing
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	746,211	718,708	626,198
Consumer Loans Financing | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	588	802	441
Residential | Performing
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	857,790	851,863	781,095
Residential | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Net	$ 3,956	$ 3,390	$ 2,570