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	$ 15,609	$ 19,626	$ 7,430
Other comprehensive income (loss):
Unrealized holding gains (losses) on securities available for sale	8,053	(1,382)	2,523
Reclassification adjustment gains realized in net income	19	0	(109)
Net unrealized gains (losses)	8,072	(1,382)	2,414
Tax effect	(2,058)	353	(904)
Net of tax amount	6,014	(1,029)	1,510
Change in funded status of defined benefit pension plan and other benefit plans:
Net gain (loss) arising during the period	(626)	(711)	1,001
Reclassification adjustment for amortization of prior service benefit	(220)	(220)	(220)
Prior service credit	0	0	0
Reclassification adjustment for partial pension settlement loss included in pension expense	0	828	0
Reclassification adjustment for amortization of net actuarial losses	312	318	413
Total before tax effect	(534)	215	1,194
Tax effect	132	(55)	(453)
Net of tax amount	(402)	160	741
Total other comprehensive income (loss)	5,612	(869)	2,251
Comprehensive income	$ 21,221	$ 18,757	$ 9,681