Loans and Leases - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	$ 33,210	$ 31,692
Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	448	2,827
Real Estate-Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	27,900	22,739
Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	2,187	2,786
Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	2,049	2,086
Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	545	1,047
Lease Financings [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	81	207
Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	32,954	30,009
Real Estate [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	273	1,351
Real Estate [Member] | Real Estate-Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	27,900	22,739
Real Estate [Member] | Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	2,187	2,786
Real Estate [Member] | Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	2,049	2,086
Real Estate [Member] | Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	545	1,047
Real Estate [Member] | Lease Financings [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
Other [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	81	1,401
Other [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	1,194
Other [Member] | Real Estate-Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
Other [Member] | Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
Other [Member] | Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
Other [Member] | Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
Other [Member] | Lease Financings [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	81	207
None [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	175	282
None [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	175	282
None [Member] | Real Estate-Commercial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
None [Member] | Real Estate-Residential Secured for Business Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
None [Member] | Real Estate-Residential Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
None [Member] | Real Estate-Home Equity Secured for Personal Purpose [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	0	0
None [Member] | Lease Financings [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Nonaccrual loans	$ 0	$ 0