Loans and Allowance for Credit Losses - Schedule of Loans Held for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale	$ 36,716	$ 2,735
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale	19,919	0
1-4 family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale	11,644	2,735
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for sale	$ 5,153	$ 0