Segment and Related Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	[1]
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information [Line Items]
Interest income	$ 13,542	$ 11,852	$ 41,218	$ 35,586
Interest expense	1,481	1,392	4,397	4,316
Noninterest income	3,055	2,981	9,469	8,384
Income (loss) before income taxes	5,728	4,614	14,513	13,889
Net income (loss)	4,037	3,168	10,432	9,851
Depreciation and amortization	775	644	2,258	2,162
Total assets	1,512,437	1,319,157	1,512,437	1,319,157	$ 1,346,492
Goodwill	44,333	39,043	44,333	39,043	$ 39,043
Capital expenditures	602	419	1,203	685
Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	13,527	11,837	41,173	35,541
Interest expense	1,290	1,206	3,834	3,761
Noninterest income	1,788	1,800	5,809	4,770
Income (loss) before income taxes	5,160	4,205	13,314	12,355
Net income (loss)	3,626	2,886	9,522	8,726
Depreciation and amortization	772	641	2,249	2,154
Total assets	1,510,324	1,317,189	1,510,324	1,317,189
Goodwill	44,333	39,043	44,333	39,043
Capital expenditures	602	419	1,182	685
Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	1,262	1,177	3,645	3,600
Income (loss) before income taxes	803	633	2,026	2,284
Net income (loss)	566	430	1,456	1,620
Depreciation and amortization	3	3	9	8
Total assets	0	0	0	0
Goodwill	0	0	0	0
Capital expenditures	0	0	21	0
Other [Member]
Segment Reporting Information [Line Items]
Interest income	15	15	45	45
Interest expense	191	186	563	555
Noninterest income	5	4	15	14
Income (loss) before income taxes	(235)	(224)	(827)	(750)
Net income (loss)	(155)	(148)	(546)	(495)
Depreciation and amortization	0	0	0	0
Total assets	224,120	200,757	224,120	200,757
Goodwill	0	0	0	0
Capital expenditures	0	0	0	0
Intersegment Eliminations [Member]
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	(222,007)	(198,789)	(222,007)	(198,789)
Goodwill	0	0	0	0
Capital expenditures	$ 0	$ 0	$ 0	$ 0

[1] Derived from audited consolidated financial statements.