Federal Income Taxes (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation between (tax -benefit) expense
Statutory tax expense	$ 2,039	$ 1,903	$ 1,622
Tax effect of non-taxable interest income	(628)	(600)	(609)
Tax effect of earnings on bank-owned life insurance-net	(112)	(115)	(114)
Tax effect of deferred tax valuation reversal	(94)
Tax effect of low income housing credit	(142)	(54)	(52)
Tax effect of non-deductible expenses	64	85	55
Federal income tax expense (benefit)	$ 1,127	$ 1,219	$ 902