Earnings Per Comon Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Earnings Per Share [Abstract]
Net Income		$ 6,647		$ 6,305		$ 13,196		$ 12,160
Basic, in shares		12,982	[1]	12,886	[2]	12,968	[1]	12,886	[2]
Basic Earnings, in dollars per share		$ 0.51	[1]	$ 0.49	[2]	$ 1.02	[1]	$ 0.94	[2]
Dilutive Average Shares Attributable to Stock Options, in shares	[1]	56		36		46		37
Diluted, in shares	[2]	13,038	[1]	12,922	[3]	13,014	[1]	12,923	[3]
Diluted Earnings, in dollars per share		$ 0.51	[1]	$ 0.49	[2]	$ 1.01	[1]	$ 0.94	[2]
Antidilutive Securities Excluded from the Calculation of Earnings Per Share, in shares		0	[1]	0	[3]	0	[1]	0	[3]

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[2] Share and Per Share Amounts have been restated for the September 28, 2015 2% stock dividend.

[3] All share and per share amounts have been adjusted for the September 2015 2% stock dividend