Subsequent Event Subsequent Event (Details) - Jul. 30, 2015 - Summit Financial Group Inc. Employee Stock Ownership Plan [Member] - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Thousands	Total
Subsequent Event [Line Items]
Amount loaned to partially finance the ESOP's purchase	$ 2,250
Number of shares purchased	225,000
Purchase price (in dollars per share)	$ 10.80
Purchase price	$ 2,430