Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 01, 2015
Operating Loss Carryforwards [Line Items]
Revaluation of net deferred tax assets as a result of the Tax Cuts and Jobs Act	$ 14,486,000	$ 0	$ 0
Operating loss carryforwards allowance	0	0
Accrued interest and penalties related to unrecognized tax benefits	169,000	$ 169,000	$ 125,000
Metropolitan Bancgroup, Inc. | Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	11,788,000
Metropolitan Bancgroup, Inc. | State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	12,881,000
Heritage Financial Group | Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	5,920,000			$ 18,321,000
Heritage Financial Group | State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 7,319,000			$ 17,168,000