Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 3,797	$ 3,634
Other comprehensive income (loss)
Net unrealized gains (losses) on available-for-sale securities	(1,163)	(498)
Net change in unrealized losses on securities transferred from available-for-sale to held-to-maturity	0	3,386
Net change in defined benefit plan assets and benefit obligations	117	(157)
Other comprehensive income, net of tax (total)	(1,046)	2,731
Comprehensive income	$ 2,751	$ 6,365