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Income Taxes - Additional information (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Unrecognized tax benefits	$ 0
Accrued interest and penalties	0
Peoples
Income Taxes
Operating loss carryforwards	4,600
Annual limitation on operating loss carryforwards	1,500
Savannah Bancorp ("SAVB")
Income Taxes
Operating loss carryforwards	13,000
Annual limitation on operating loss carryforwards	2,000
Park Sterling Corporation
Income Taxes
Operating loss carryforwards	1,100
RBIL carryforwards	12,800
Annual limitations on RBIL carryforward	1,100
Annual limitation on operating loss carryforwards	218
Federal
Income Taxes
Operating loss carryforwards	18,700	$ 24,300
State
Income Taxes
Operating loss carryforwards	108,600	$ 101,400
Valuation allowance relating to operating loss carryforwards	$ 3,900

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