Loans and Leases - Schedule of Concessions Granted on Accruing and Nonaccrual Troubled Loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan	Sep. 30, 2021 USD ($) loan	Sep. 30, 2020 USD ($) loan
Accrual Troubled Debt Restructuring Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans	0	0	0	0
Accrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans	0	0	0	0
Financing receivable modifications, recorded investments | $	$ 0	$ 0	$ 0	$ 0
Nonaccrual Troubled Debt Restructuring Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans	3	1	3	2
Nonaccrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans	3	1	3	2
Financing receivable modifications, recorded investments | $	$ 198	$ 544	$ 198	$ 1,163
Commercial Financial And Agricultural [Member] | Nonaccrual Troubled Debt Restructuring Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans			0	1
Commercial Financial And Agricultural [Member] | Nonaccrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans				1
Financing receivable modifications, recorded investments | $				$ 619
Real Estate Residential Secured For Personal Purpose [Member] | Nonaccrual Troubled Debt Restructuring Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans	0	1	0	1
Real Estate Residential Secured For Personal Purpose [Member] | Nonaccrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans		1		1
Financing receivable modifications, recorded investments | $		$ 544		$ 544
Real-Estate Commercial [Member] | Nonaccrual Troubled Debt Restructuring Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans	3	0	3	0
Real-Estate Commercial [Member] | Nonaccrual Troubled Debt Restructuring Loans [Member] | Amortization Period Extension [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of loans	3		3
Financing receivable modifications, recorded investments | $	$ 198		$ 198