Earnings Per Comon Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Earnings Per Share [Abstract]
Net Income	$ 5,855		$ 5,320
Basic, in shares	12,633	[1]	12,601	[1]
Basic Earnings, in dollars per share	$ 0.46	[1]	$ 0.42	[1]
Dilutive Average Shares Attributable to Stock Options, in shares	38	[1]	24
Diluted, in shares	12,671	[1]	12,625	[1],[2]
Diluted Earnings, in dollars per share	$ 0.46	[1]	$ 0.42	[1]
Antidilutive Securities Excluded from the Calculation of Earnings Per Share, in shares	0	[1]	0	[2]

[1] Share and Per Share Amounts have been restated for the September 2014 2% stock dividend.

[2] All share and per share amounts have been adjusted for the September 2014 2% stock dividend