Income Taxes - Narrative (Details) - Heritage Financial Group - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jul. 01, 2015
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, valuation allowance	$ 0	$ 0	$ 0
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryfowards	6,160,000			$ 18,321,000
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryfowards	$ 7,995,000			$ 17,168,000