Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income, before tax amount	$ 30,315	$ 27,307	$ 22,433
Income tax expense (benefit)	6,662	5,388	9,540
Net income	23,653	21,919	12,893
Investment securities available for sale:
Unrealized holding (losses) gains on securities arising during the period, before tax	1,814	(756)	(152)
Unrealized holding (losses) gains on securities arising during the period, tax	482	(225)	(18)
Unrealized holding (losses) gains on securities arising during the period, net	1,332	(531)	(134)
Less: reclassification adjustment for gains on securities included in net income, before tax	373	(183)	62
Less: reclassification adjustment for gains on securities included in net income, tax	78	(38)	22
Less: reclassification adjustment for gains on securities included in net income, net of tax	295	(145)	40
Total unrealized (losses) gains on securities available for sale, before tax	1,441	(573)	(214)
Total unrealized (losses) gains on securities available for sale, tax	404	(187)	(40)
Total unrealized (losses) gains on securities available for sale, net of tax	1,037	(386)	(174)
Adjustments related to defined benefit plan:
Adjustments related to defined benefit plan, Amortization (accretion) of prior service cost, before tax	83	83	83
Adjustments related to defined benefit plan, Amortization (accretion) of prior service cost, tax	(53)	173	33
Adjustments related to defined benefit plan, Amortization (accretion) of prior service cost, net of tax	136	(90)	50
Total adjustments related to defined benefit plan, before tax	83	83	83
Total adjustments related to defined benefit plan, tax	(53)	173	33
Total adjustments related to defined benefit plan, net of tax	136	(90)	50
Net unrealized losses from cash flow hedges:
Unrealized holding gains on cash flow hedges arising during the period, before tax	(1,195)	25	204
Unrealized holding gains on cash flow hedges arising during the period, tax	(333)	(123)	34
Unrealized holding gains on cash flow hedges arising during the period, net of tax	(862)	148	170
Total unrealized gains on cash flow hedges, before tax	(1,195)	25	204
Total unrealized gains on cash flow hedges, tax	(333)	(123)	34
Total unrealized gains on cash flow hedges, net of tax	(862)	148	170
Total other comprehensive income, before tax	329	(465)	73
Total other comprehensive income, tax	18	(137)	27
Period change	311	(328)	46
Total comprehensive income, before tax	30,644	26,842	22,506
Total comprehensive income tax	6,680	5,251	9,567
Total comprehensive income	$ 23,964	$ 21,591	$ 12,939