Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 01, 2018	Jul. 31, 2015
Operating Loss Carryforwards [Line Items]
Revaluation of net deferred tax assets as a result of the Tax Cuts and Jobs Act	$ 0	$ 14,486,000	$ 0
Operating loss carryforwards allowance	0	0
Accrued interest and penalties related to unrecognized tax benefits	244,000	169,000	$ 169,000
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	76,919,000	5,920,000
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	65,583,000	$ 7,319,000
Brand Group Holdings, Inc. | Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards				$ 83,960,000
Operating loss carryforwards, not subject to expiration	71,963,000
Brand Group Holdings, Inc. | State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards				$ 67,168,000
Operating loss carryforwards, not subject to expiration	63,218,000
Heritage Financial Group | Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	4,956,000				$ 18,321,000
Heritage Financial Group | State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 2,365,000				$ 16,877,000