Stock-Based Compensation (Summary Stock Options Exercised) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Stock-Based Compensation [Abstract]      
Total intrinsic value of options exercised $ 777 $ 467 $ 140
Cash received from options exercised 737 794 252
Tax deduction realized from options exercised $ 264 $ 141 $ 48