Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Earnings Per Share [Abstract]
Net Income	$ 21,795		$ 22,179		$ 21,933
Basic Shares, in Shares	12,296	[1]	12,247	[1]	12,209	[1]
Basic Earnings, in Earnings Per Share	$ 1.77	[1]	$ 1.81	[1]	$ 1.80	[1]
Dilutive Average Shares Attributable to Stock Options, in Shares	31		10		12
Weighted Average Shares - Diluted, in Shares	12,327	[1]	12,257	[1]	12,221	[1]
Diluted Earnings, In Earnings Per Share	$ 1.77	[1]	$ 1.81	[1]	$ 1.79	[1]
Antidilutive Shares Excluded from the Calculation of Earnings Per Share, in Shares	47		203		136

[1] Share and Per Share Amounts have been restated for the September 2013 2% stock dividend.