Earnings Per Comon Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended				9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Earnings Per Share [Abstract]
Net Income		$ 6,738		$ 5,933		$ 19,934		$ 18,093
Basic, in shares		13,407	[1]	13,275	[2]	13,374	[1]	13,273	[2]
Basic Earnings, in dollars per share		$ 0.50	[1]	$ 0.45	[2]	$ 1.49	[1]	$ 1.36	[2]
Dilutive Average Shares Attributable to Stock Options, in shares	[1]	90		42		65		41
Diluted, in shares	[2]	13,497	[1]	13,317	[3]	13,439	[1]	13,314	[3]
Diluted Earnings, in dollars per share		$ 0.50	[1]	$ 0.45	[2]	$ 1.48	[1]	$ 1.36	[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 29, 2016 3% stock dividend.

[3] All share and per share amounts have been adjusted for the September 29, 2016 3% stock dividend