Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income, before tax amount	$ 7,480	$ 6,748	$ 14,740	$ 13,213
Income tax expense	1,646	1,351	3,166	2,586
Net income	5,834	5,397	11,574	10,627
Debt securities available for sale:
Unrealized holding (losses) gains on securities arising during the period, before tax	874	(136)	1,187	(943)
Unrealized holding (losses) gains on securities arising during the period, tax	243	(63)	316	(289)
Unrealized holding (losses) gains on securities arising during the period, net	631	(73)	871	(654)
Less: reclassification adjustment for gains on securities included in net income, before tax	98	7	198	7
Less: reclassification adjustment for gains on securities included in net income, tax	21	1	42	1
Less: reclassification adjustment for gains on securities included in net income, net	77	6	156	6
Total unrealized (losses) gains on securities available for sale, before tax	776	(143)	989	(950)
Total unrealized (losses) gains on securities available for sale, tax	222	(64)	274	(290)
Total unrealized (losses) gains on securities available for sale, net of tax	554	(79)	715	(660)
Adjustments related to defined benefit plan:
Amortization of prior service cost, before tax	21	21	42	42
Amortization of prior service cost, tax	6	6	(64)	161
Amortization of prior service cost, net of tax	15	15	106	(119)
Total adjustments related to defined benefit plan, before tax	21	21	42	42
Total adjustments related to defined benefit plan, tax	6	6	(64)	161
Total adjustments related to defined benefit plan, net	15	15	106	(119)
Net unrealized (losses) gains from cash flow hedges:
Unrealized holding (losses) gains on cash flow hedges arising during the period, before tax	(584)	82	(992)	665
Unrealized holding (losses) gains on cash flow hedges arising during the period, tax	(169)	23	(275)	57
Unrealized holding (losses) gains on cash flow hedges arising during the period, net of tax	(415)	59	(717)	608
Total unrealized (losses) gains on cash flow hedges, before tax	(584)	82	(992)	665
Total unrealized (losses) gains on cash flow hedges, tax	(169)	23	(275)	57
Total unrealized (losses) gains on cash flow hedges, net of tax	(415)	59	(717)	608
Total other comprehensive income (loss), before tax	213	(40)	39	(243)
Total other comprehensive income (loss), tax	59	(35)	(65)	(72)
Total other comprehensive income (loss), net	154	(5)	104	(171)
Total comprehensive income, before tax	7,693	6,708	14,779	12,970
Total comprehensive income, tax	1,705	1,316	3,101	2,514
Total comprehensive income	$ 5,988	$ 5,392	$ 11,678	$ 10,456