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Loans - Impact of Modifications Classified as Restructured Loans (Details) $ in Thousands | 12 Months Ended
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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

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- Definition Troubled Debt Restructuring Financing Receivable Modifications [Abstract] + References No definition available. + Details
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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 + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + 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 + Details
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