Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Statutory Rate applied to the pre-tax income	35.00%	35.00%	35.00%
Statutory Rate Times Pre-tax Income	$ 17,195	$ 14,585	$ 14,145
Add (Subtract) the Tax Effect of:
Income from Tax-exempt Loans and Investments	(2,929)	(2,250)	(1,697)
State Income Tax, Net of Federal Tax Effect	564	727	625
General Business Tax Credits	(621)	(750)	(562)
Company Owned Life Insurance	(346)	(296)	(289)
Other Differences	83	(410)	(153)
Total Income Taxes	$ 13,946	$ 11,606	$ 12,069