Loans and Leases - Summary of Major Loan and Lease Categories (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	$ 6,239,804	$ 6,123,230	$ 5,400,786
Loans and Leases Receivable, Allowance	(80,034)	(79,004)
Net loans and leases held for investment	6,159,770	6,044,226
Unearned lease income	24,386	21,932
Net deferred costs, included in the above table	6,633	6,053
Overdraft deposits included in the above table	154	93
Commercial Financial And Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	1,032,753	1,088,928	942,783
Real-Estate Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	3,128,210	3,027,955	2,816,737
Real-Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	376,569	381,811	285,083
Real Estate Residential Secured For Business Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	498,505	478,254	412,486
Real Estate-Residential Secured For Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	779,557	730,395	568,735
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	172,073	176,699	160,134
Loans to Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	28,656	27,873	26,249
Lease Financings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable, net of deferred income	$ 223,481	$ 211,315	$ 188,579