Earnings Per Comon Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016		Mar. 31, 2015
Earnings Per Share [Abstract]
Net Income		$ 6,549		$ 5,855
Basic, in shares		(12,954)	[1]	(12,886)	[2]
Basic Earnings, in dollars per share		$ 0.51	[1]	$ 0.45	[2]
Dilutive Average Shares Attributable to Stock Options, in shares		35	[1]	38
Diluted, in shares	[2]	12,989	[1]	12,924	[3]
Diluted Earnings, in dollars per share		$ 0.50	[1]	$ 0.45	[2]
Antidilutive Securities Excluded from the Calculation of Earnings Per Share, in shares		0	[1]	0	[3]

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

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