Business Combinations (Pro Forma Information) (Details) (Home Federal Bank, USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Home Federal Bank
   
Business Acquisition, Pro Forma Information [Abstract]    
Net interest income $ 79,373 $ 77,932
Non interest expense 89,205 110,454
Net income $ 11,288 $ 27,308
Net income per diluted share (in dollars per share) $ 0.16 $ 0.38