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	$ 39,699	$ 36,213	$ 22,301
Unrealized (losses) gains on securities:
Unrealized holding (losses) gains arising during period	(270)	326	533
Less: reclassification adjustment for gains included in net income	(44)	(217)	(28)
Total unrealized (losses) gains on securities	(314)	109	505
Accretion of net unrealized losses transferred during period	753	1,086	1,034
Defined benefit pension plans:
Amortization of prior service cost and loss included in net periodic benefit cost	1,053	1,167	931
Pension liability adjustment:
Net (loss) gain	(6,842)	3,770	(2,315)
Total pension liability adjustment	(5,789)	4,937	(1,384)
Other comprehensive (loss) income	(5,350)	6,132	155
Comprehensive income (loss)	$ 34,349	$ 42,345	$ 22,456