Segment and Related Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) segment	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	[1]
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information [Line Items]
Interest income	$ 15,603	$ 13,769	$ 30,284	$ 27,940
Interest expense	1,691	1,609	3,238	3,196
Noninterest income	3,348	3,367	6,619	6,664
Income (loss) before income taxes	6,199	5,821	11,863	11,734
Net income (loss)	4,279	4,088	8,342	8,216
Depreciation and amortization	672	762	1,281	1,525
Total assets	1,764,473	1,601,651	1,764,473	1,601,651	$ 1,678,638
Goodwill	43,872	43,872	43,872	43,872	$ 43,872
Capital expenditures	1,076	120	1,739	269
Operating Segments | Community Banking
Segment Reporting Information [Line Items]
Interest income	15,518	13,754	30,114	27,910
Interest expense	1,447	1,396	2,755	2,775
Noninterest income	2,242	2,177	4,403	4,335
Income (loss) before income taxes	6,129	5,566	11,586	11,182
Net income (loss)	4,217	3,891	8,113	7,798
Depreciation and amortization	669	759	1,275	1,519
Total assets	1,755,185	1,597,722	1,755,185	1,597,722
Goodwill	43,872	43,872	43,872	43,872
Capital expenditures	1,071	120	1,728	269
Operating Segments | Trust and Investment Services
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	1,100	1,184	2,204	2,318
Income (loss) before income taxes	518	679	1,059	1,334
Net income (loss)	358	477	746	934
Depreciation and amortization	3	3	6	6
Total assets	0	0	0	0
Goodwill	0	0	0	0
Capital expenditures	5	0	11	0
Other
Segment Reporting Information [Line Items]
Interest income	85	15	170	30
Interest expense	244	213	483	421
Noninterest income	6	6	12	11
Income (loss) before income taxes	(448)	(424)	(782)	(782)
Net income (loss)	(296)	(280)	(517)	(516)
Depreciation and amortization	0	0	0	0
Total assets	234,913	230,456	234,913	230,456
Goodwill	0	0	0	0
Capital expenditures	0	0	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Net income (loss)	0	0	0	0
Depreciation and amortization	0	0	0	0
Total assets	(225,625)	(226,527)	(225,625)	(226,527)
Goodwill	0	0	0	0
Capital expenditures	$ 0	$ 0	$ 0	$ 0

[1] Derived from audited consolidated financial statements.