Federal Income Taxes (Income Tax Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Federal Income Taxes [Abstract]
Federal tax rate									34.00%	34.00%	34.00%
Provision at the expected statutory rate									$ 2,779	$ 2,435	$ 2,088
Effect of tax-exempt income									(1,105)	(1,086)	(873)
Effect of investment in life insurance									(91)	(68)	(78)
Nondeductible interest									37	42	40
Nondeductible merger and acquisition expense									34	163
Other items									(10)	(24)	24
Provision for income taxes	$ 421	$ 546	$ 593	$ 84	$ 251	$ 366	$ 475	$ 370	1,644	1,462	1,201
Income Tax Examination, Penalties and Interest Expense									0	0	$ 0
Income Tax Examination, Penalties and Interest Accrued	$ 0				$ 0				$ 0	$ 0