Premises and Equipment - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 17, 2015	Nov. 07, 2014
Premises and Equipment [Line Items]
Rent expense	$ 3,456	$ 3,258	$ 2,608
Merger with Ameriana Bancorp
Premises and Equipment [Line Items]
Premises and equipment acquired	$ 14,491
Merger with C Financial Corporation
Premises and Equipment [Line Items]
Premises and equipment acquired				$ 7,290
Merger with Community Bancshares, Inc.
Premises and Equipment [Line Items]
Premises and equipment acquired					$ 3,610