Loans and Leases - Aging Analysis of Accruing and Nonaccrual Modified Loans to Borrowers Experiencing Financial Difficult (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	$ 6,801,185	$ 6,826,583	$ 6,684,837
Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	19,634		20,318
Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0		3,523
Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	6,746,292	6,796,866
Current | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	19,634		20,318
Current | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0		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		0
Financial Asset, 30 to 89 Days Past Due | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0		0
90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	125	321
90 Days or more Past Due | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0		0
90 Days or more Past Due | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0		0
Commercial, financial and agricultural
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	1,052,246	1,037,835	1,055,332
Commercial, financial and agricultural | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	14,624		12,258
Commercial, financial and agricultural | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	1,034,884	1,031,567
Commercial, financial and agricultural | Current | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	14,624		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		0
Commercial, financial and agricultural | 90 Days or more Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0	0
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		0
Real estate-construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	302,424	274,483	313,229
Real estate-construction | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	5,010
Real estate-construction | Nonaccrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross			3,523
Real estate-construction | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	301,789	270,824
Real estate-construction | Current | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	5,010
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 | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	0
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 | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	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
Real estate-commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	3,485,615	3,530,451	3,373,889
Real estate-commercial | Accrual Modified Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross			8,060
Real estate-commercial | Current
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivables, gross	3,466,623	3,524,438
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