Loans - Schedule of Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans on nonaccrual status	$ 23,191	$ 8,920
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans on nonaccrual status	16,629	3,599
Real estate – construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans on nonaccrual status	351	278
Real estate – commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans on nonaccrual status	4,462	2,977
Real estate – residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans on nonaccrual status	1,720	2,008
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans on nonaccrual status	$ 29	$ 58