Loans and Leases - Aging Analysis of Accruing and Nonaccrual Modified Loans to Borrowers Experiencing Financial Difficult (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	$ 6,684,837	$ 6,567,214	$ 6,462,238
Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	20,318
Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	3,523
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	6,650,990	6,520,942
Current | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	20,318
Current | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	3,523
Financial Asset, 30 to 89 Days Past Due | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Financial Asset, 30 to 89 Days Past Due | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	205	534
90 Days or more Past Due | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
90 Days or more Past Due | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	1,055,332	989,723	1,039,265
Commercial, financial and agricultural | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	12,258
Commercial, financial and agricultural | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	1,050,414	985,469
Commercial, financial and agricultural | Current | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	12,258
Commercial, financial and agricultural | Financial Asset, 30 to 89 Days Past Due | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Commercial, financial and agricultural | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0	285
Commercial, financial and agricultural | 90 Days or more Past Due | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real estate-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	3,373,889	3,302,798	3,221,993
Real estate-commercial | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	8,060
Real estate-commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	3,365,362	3,294,254
Real estate-commercial | Current | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	8,060
Real estate-commercial | Financial Asset, 30 to 89 Days Past Due | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real estate-commercial | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0	0
Real estate-commercial | 90 Days or more Past Due | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real estate-construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	313,229	394,462	$ 413,404
Real estate-construction | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net of deferred income	3,523
Real estate-construction | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	309,706	378,328
Real estate-construction | Current | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	3,523
Real estate-construction | Financial Asset, 30 to 89 Days Past Due | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
Real estate-construction | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0	$ 0
Real estate-construction | 90 Days or more Past Due | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	$ 0