Segment and Related Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	[1]
Segment Reporting [Abstract]
Number of reportable segments | segment	2
Segment Reporting Information [Line Items]
Interest income	$ 18,096	$ 16,668
Interest expense	3,028	2,125
Noninterest income	3,451	3,333
Income (loss) before income taxes	7,574	7,218
Net income (loss)	6,003	5,812
Depreciation and amortization	460	543
Total assets	1,868,404	1,817,574	$ 1,862,866
Goodwill	43,872	43,872	$ 43,872
Capital expenditures	393	345
Operating Segments | Community Banking
Segment Reporting Information [Line Items]
Interest income	17,999	16,580
Interest expense	2,644	1,835
Noninterest income	2,060	2,063
Income (loss) before income taxes	7,520	7,026
Net income (loss)	5,997	5,653
Depreciation and amortization	458	540
Total assets	1,857,272	1,807,991
Goodwill	43,872	43,872
Capital expenditures	386	345
Operating Segments | Trust and Investment Services
Segment Reporting Information [Line Items]
Interest income	0	0
Interest expense	0	0
Noninterest income	1,061	1,151
Income (loss) before income taxes	480	453
Net income (loss)	380	365
Depreciation and amortization	2	3
Total assets	0	0
Goodwill	0	0
Capital expenditures	7	0
Other
Segment Reporting Information [Line Items]
Interest income	97	88
Interest expense	384	290
Noninterest income	330	119
Income (loss) before income taxes	(426)	(261)
Net income (loss)	(374)	(206)
Depreciation and amortization	0	0
Total assets	259,009	237,802
Goodwill	0	0
Capital expenditures	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Interest income	0	0
Interest expense	0	0
Noninterest income	0	0
Income (loss) before income taxes	0	0
Net income (loss)	0	0
Depreciation and amortization	0	0
Total assets	(247,877)	(228,219)
Goodwill	0	0
Capital expenditures	$ 0	$ 0

[1] Derived from audited consolidated financial statements.