Loans - Schedule of Loans in Deferral (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Financing Receivable, Nonaccrual [Line Items]
Value of loans deferred, not classified as TDRs	$ 702,650
Percentage on payment deferral	13.00%
Construction and land development
Financing Receivable, Nonaccrual [Line Items]
Value of loans deferred, not classified as TDRs	$ 9,359
Percentage on payment deferral	3.00%
Commercial real estate - owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Value of loans deferred, not classified as TDRs	$ 204,710
Percentage on payment deferral	18.00%
Commercial real estate - non owner-occupied
Financing Receivable, Nonaccrual [Line Items]
Value of loans deferred, not classified as TDRs	$ 344,573
Percentage on payment deferral	25.00%
Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Value of loans deferred, not classified as TDRs	$ 75,885
Percentage on payment deferral	5.00%
Commercial and financial
Financing Receivable, Nonaccrual [Line Items]
Value of loans deferred, not classified as TDRs	$ 61,308
Percentage on payment deferral	7.00%
Consumer
Financing Receivable, Nonaccrual [Line Items]
Value of loans deferred, not classified as TDRs	$ 6,815
Percentage on payment deferral	4.00%