Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Earnings Per Share [Abstract]
Net Income	$ 24,662	$ 23,360		$ 21,795
Basic Shares, in Shares	12,894	12,856	[1]	12,793	[1]
Basic Earnings, in Earnings Per Share	$ 1.91	$ 1.82	[1]	$ 1.70	[1]
Dilutive Average Shares Attributable to Stock Options, in Shares	48	30		32
Weighted Average Shares - Diluted, in Shares	12,942	12,886	[1]	12,825	[1]
Diluted Earnings, In Earnings Per Share	$ 1.91	$ 1.81	[1]	$ 1.70	[1]
Antidilutive Shares Excluded from the Calculation of Earnings Per Share, in Shares	0	0		47

[1] Share and Per Share Amounts have been restated for the September 2015 2% stock dividend.