Federal Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal Income Taxes [Abstract]
Current tax expense									$ 2,134	$ 2,382	$ 1,712
Deferred tax expense (benefit)									(832)	(111)	294
Income tax provision	$ 104	$ 383	$ 130	$ 685	$ 493	$ 306	$ 632	$ 839	$ 1,302	$ 2,271	$ 2,006