Loans and Leases - Accruing and Nonaccruing Troubled Debt Restructured Loans with Payment Defaults (Details) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021 USD ($) loan	Jun. 30, 2020 USD ($) loan	Jun. 30, 2021 USD ($) loan	Jun. 30, 2020 USD ($) loan
Accrual Troubled Debt Restructuring Loans [Member]
Financing Receivables Troubled Debt Restructurings That Subsequently Defaulted [Abstract]
Number of loans \| loan	0	0	0	0
Recorded investment \| $	$ 0	$ 0	$ 0	$ 0
Number of loans \| loan	0	0	0	0
Post-restructuring outstanding recorded investment \| $	$ 0	$ 0	$ 0	$ 0
Accrual Troubled Debt Restructuring Loans [Member] \| Amortization Period Extension [Member]
Financing Receivables Troubled Debt Restructurings That Subsequently Defaulted [Abstract]
Number of loans \| loan	0	0	0	0
Financing receivable modifications, recorded investments \| $	$ 0	$ 0	$ 0	$ 0
Nonaccrual Troubled Debt Restructuring Loans [Member]
Financing Receivables Troubled Debt Restructurings That Subsequently Defaulted [Abstract]
Number of loans \| loan	1	1	1	1
Recorded investment \| $	$ 530	$ 13	$ 530	$ 13
Number of loans \| loan	0	1	0	1
Post-restructuring outstanding recorded investment \| $	$ 0	$ 619	$ 0	$ 619
Nonaccrual Troubled Debt Restructuring Loans [Member] \| Amortization Period Extension [Member]
Financing Receivables Troubled Debt Restructurings That Subsequently Defaulted [Abstract]
Number of loans \| loan	0	1	0	1
Financing receivable modifications, recorded investments \| $	$ 0	$ 619	$ 0	$ 619
Nonaccrual Troubled Debt Restructuring Loans [Member] \| Commercial Financial And Agricultural [Member]
Financing Receivables Troubled Debt Restructurings That Subsequently Defaulted [Abstract]
Number of loans \| loan	0	1	0	1
Recorded investment \| $	$ 0	$ 13	$ 0	$ 13
Number of loans \| loan	0	1	0	1
Post-restructuring outstanding recorded investment \| $	$ 0	$ 619	$ 0	$ 619
Nonaccrual Troubled Debt Restructuring Loans [Member] \| Commercial Financial And Agricultural [Member] \| Amortization Period Extension [Member]
Financing Receivables Troubled Debt Restructurings That Subsequently Defaulted [Abstract]
Number of loans \| loan		1		1
Financing receivable modifications, recorded investments \| $		$ 619		$ 619
Nonaccrual Troubled Debt Restructuring Loans [Member] \| Real Estate Residential Secured For Personal Purpose [Member]
Financing Receivables Troubled Debt Restructurings That Subsequently Defaulted [Abstract]
Recorded investment \| $	$ 530	$ 0	$ 530	$ 0
Number of loans \| loan	1	0	1	0

Number of financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

+ References

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- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

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- Definition

Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

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- Definition

Recorded investment of financing receivables that have been modified by troubled debt restructurings

+ References

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- Definition

Accruing and nonaccrual troubled debt restructured loans for which there was a payment default in the current reporting period and within 12 months following restructuring.

+ References

No definition available.

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