Loans and Leases - Summary of Major Loan and Lease Categories (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	$ 6,574,958	$ 6,123,230	$ 5,849,259
Loans and Leases Receivable, Allowance	(83,837)	(79,004)
Net loans and leases held for investment	6,491,121	6,044,226
Unearned lease income	28,625	21,932
Net deferred costs, included in the above table	7,568	6,053
Overdraft deposits included in the above table	97	93
Commercial Financial And Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	1,050,004	1,088,928	1,054,940
Real-Estate Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	3,275,140	3,027,955	2,936,204
Real-Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	427,561	381,811	329,915
Real Estate Residential Secured For Business Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	516,471	478,254	443,837
Real Estate-Residential Secured For Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	861,122	730,395	685,771
Real Estate Home Equity Secured For Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	176,855	176,699	175,843
Loans to Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	27,331	27,873	26,679
Lease Financings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	$ 240,474	$ 211,315	$ 196,070