Income Tax (Reconciliation of Income Tax Expense at Federal Statutory Rate to Actual Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of federal statutory to actual tax expense
Federal statutory income tax at 34%	$ 5,993	$ 5,721	$ 4,897
Other than temporary impairment			(615)
State taxes	145	145	145
Non tax captive insurance income	(319)
Low income housing credits	(96)	(96)	(107)
Tax-exempt income	(1,404)	(1,111)	(818)
Other	67	(81)	364
Income tax expense (benefit), Total	$ 4,386	$ 4,578	$ 3,866
Effective tax rate	24.88%	27.21%	25.93%
Federal statutory income tax rate	34.00%	34.00%	34.00%