Federal Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Tax Credit Carryforward [Line Items]
Capital loss carryover	$ 280	$ 813
Penalties and interest expense	0	$ 0	$ 0
Uncertain tax positions	0
Capital Loss Carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward, Amount	824
Tax Credit Carryforward, Valuation Allowance	280
Expiring 2018 [Member]
Tax Credit Carryforward [Line Items]
Capital loss carryover	$ 280