CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 19,626	$ 7,430	$ 10,027
Other comprehensive income (loss):
Unrealized holding gains (losses) on securities available for sale	(1,382)	2,523	(6,352)
Reclassification adjustment gains realized in net income	0	(109)	(987)
Net unrealized gains (losses)	(1,382)	2,414	(7,339)
Tax effect	353	(904)	2,773
Net of tax amount	(1,029)	1,510	(4,566)
Change in funded status of defined benefit pension plan and other benefit plans:
Net gain (loss) arising during the period	(711)	1,001	5,369
Reclassification adjustment for amortization of prior service benefit	(220)	(220)	(427)
Prior service credit	0	0	1,101
Reclassification adjustment for partial pension settlement loss included in pension expense	828	0	0
Reclassification adjustment for amortization of net actuarial losses	318	413	1,595
Total before tax effect	215	1,194	7,638
Tax effect	(55)	(453)	(2,884)
Net of tax amount	160	741	4,754
Total other comprehensive income (loss)	(869)	2,251	188
Comprehensive income	$ 18,757	$ 9,681	$ 10,215