Business Combinations (Unaudited Pro Forma Information) (Details) (Home Federal Bank, USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Home Federal Bank
Business Acquisition [Line Items]
Net interest income	$ 18,592	$ 23,309	$ 59,870	$ 67,433
Non-interest expense	19,728	23,693	88,455	83,123
Net income	$ 2,432	$ 2,689	$ 8,689	$ 46,473
Net income per diluted share (in dollars per share)	$ 0.03	$ 0.04	$ 0.11	$ 0.65