CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 4,439	$ 2,979
Other comprehensive income (loss):
Unrealized holding gains (losses) on securities available for sale	(4,439)	3,166
Tax effect	(1,132)	1,189
Net of tax amount	(3,307)	1,977
Change in funded status of defined benefit pension plan and other benefit plans:
Reclassification adjustment for amortization of prior service costs	(55)	(55)
Reclassification adjustment for amortization of net actuarial loss	73	88
Total before tax effect	18	33
Tax effect	5	12
Net of tax amount	13	21
Total other comprehensive income (loss)	(3,294)	1,998
Comprehensive income	$ 1,145	$ 4,977