Federal Income Taxes (Schedule of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Federal Income Taxes [Abstract]
Current tax expense: Federal	$ 1,515	$ 1,581
Current tax expense: State	10	10
Deferred income tax (benefit) expense: Federal	344	(88)
Income tax expense	$ 1,869	$ 1,503