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		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Basic Earnings per Share:
Net Income	$ 7,708	$ 6,483	$ 20,700	$ 18,824
Weighted Average Shares Outstanding	13,210,395	12,666,780	13,200,025	12,658,403
Basic Earnings per Share (USD per share)	$ 0.58	$ 0.51	$ 1.57	$ 1.49
Diluted Earnings per Share:
Net Income	$ 7,708	$ 6,483	$ 20,700	$ 18,824
Weighted Average Shares Outstanding	13,210,395	12,666,780	13,200,025	12,658,403
Potentially Dilutive Shares, Net	20,280	24,384	20,975	19,950
Diluted Weighted Average Shares Outstanding	13,230,675	12,691,164	13,221,000	12,678,353
Diluted Earnings per Share (USD per share)	$ 0.58	$ 0.51	$ 1.57	$ 1.48