Loans - Impact of Modifications Classified as Restructured Loans (Details) $ in Thousands	12 Months Ended
Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan
Restructured loans
Number of Loans \| loan	26	45	51
Pre-Modification Outstanding Amortized Cost	$ 10,018	$ 12,291	$ 14,302
Post-Modification Outstanding Amortized Cost	$ 10,040	$ 12,311	$ 14,011
Commercial, financial, agricultural
Restructured loans
Number of Loans \| loan	1	8	8
Pre-Modification Outstanding Amortized Cost	$ 113	$ 5,393	$ 2,891
Post-Modification Outstanding Amortized Cost	$ 114	$ 5,393	$ 2,890
Real estate – 1-4 family mortgage:
Restructured loans
Number of Loans \| loan	23		28
Pre-Modification Outstanding Amortized Cost	$ 3,159		$ 4,229
Post-Modification Outstanding Amortized Cost	$ 3,180		$ 4,255
Real estate – 1-4 family mortgage: \| Primary
Restructured loans
Number of Loans \| loan	20	36	24
Pre-Modification Outstanding Amortized Cost	$ 3,061	$ 6,061	$ 3,928
Post-Modification Outstanding Amortized Cost	$ 3,086	$ 6,108	$ 3,886
Real estate – 1-4 family mortgage: \| Home equity
Restructured loans
Number of Loans \| loan			1
Pre-Modification Outstanding Amortized Cost			$ 159
Post-Modification Outstanding Amortized Cost			$ 162
Real estate – 1-4 family mortgage: \| Rental/investment
Restructured loans
Number of Loans \| loan			3
Pre-Modification Outstanding Amortized Cost			$ 142
Post-Modification Outstanding Amortized Cost			$ 207
Real estate – 1-4 family mortgage: \| Land development
Restructured loans
Number of Loans \| loan	3
Pre-Modification Outstanding Amortized Cost	$ 98
Post-Modification Outstanding Amortized Cost	$ 94
Real estate – commercial mortgage:
Restructured loans
Number of Loans \| loan	2		12
Pre-Modification Outstanding Amortized Cost	$ 6,746		$ 7,133
Post-Modification Outstanding Amortized Cost	$ 6,746		$ 6,826
Real estate – commercial mortgage: \| Land development
Restructured loans
Number of Loans \| loan			1
Pre-Modification Outstanding Amortized Cost			$ 189
Post-Modification Outstanding Amortized Cost			$ 189
Real estate – commercial mortgage: \| Owner-occupied
Restructured loans
Number of Loans \| loan	1		8
Pre-Modification Outstanding Amortized Cost	$ 246		$ 6,192
Post-Modification Outstanding Amortized Cost	$ 246		$ 5,883
Real estate – commercial mortgage: \| Non-owner occupied
Restructured loans
Number of Loans \| loan	1	1	3
Pre-Modification Outstanding Amortized Cost	$ 6,500	$ 837	$ 752
Post-Modification Outstanding Amortized Cost	$ 6,500	$ 810	$ 754
Installment loans to individuals
Restructured loans
Number of Loans \| loan			3
Pre-Modification Outstanding Amortized Cost			$ 49
Post-Modification Outstanding Amortized Cost			$ 40

Troubled Debt Restructuring Financing Receivable Modifications [Abstract]

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- Definition

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

+ References

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

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

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Amount, before troubled debt restructuring, of financing receivable to be modified.

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