Per Share Data (Computations of Basic Earnings Per Share and Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Basic Earnings per Share:
Net Income	$ 6,305	$ 5,809
Weighted Average Shares Outstanding	13,179,188	12,641,842
Basic Earnings per Share (USD per share)	$ 0.48	$ 0.46
Diluted Earnings per Share:
Net Income	$ 6,305	$ 5,809
Weighted Average Shares Outstanding	13,179,188	12,641,842
Potentially Dilutive Shares, Net	24,513	19,850
Diluted Weighted Average Shares Outstanding	13,203,701	12,661,692
Diluted Earnings per Share (USD per share)	$ 0.48	$ 0.46