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Non Purchased Loans - Impact of Modifications Classified as Restructured Loans (Details) - Non-Purchased $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan | Dec. 31, 2018 USD ($) loan
Restructured loans |  |  |
Number of Loans | loan | 38 | 7 | 11
Pre-Modification Outstanding Recorded Investment | $ 9,040 | $ 647 | $ 1,858
Post-Modification Outstanding Recorded Investment | $ 9,115 | $ 644 | $ 1,852
Commercial, financial, agricultural |  |  |
Restructured loans |  |  |
Number of Loans | loan | 7 | 2 |
Pre-Modification Outstanding Recorded Investment | $ 1,862 | $ 187 |
Post-Modification Outstanding Recorded Investment | $ 1,859 | $ 185 |
Real estate – 1-4 family mortgage |  |  |
Restructured loans |  |  |
Number of Loans | loan | 23 | 5 | 9
Pre-Modification Outstanding Recorded Investment | $ 3,736 | $ 460 | $ 1,764
Post-Modification Outstanding Recorded Investment | $ 3,866 | $ 459 | $ 1,763
Real estate – 1-4 family mortgage | Primary |  |  |
Restructured loans |  |  |
Number of Loans | loan | 20 |  |
Pre-Modification Outstanding Recorded Investment | $ 3,594 |  |
Post-Modification Outstanding Recorded Investment | $ 3,659 |  |
Real estate – 1-4 family mortgage | Rental / Investment |  |  |
Restructured loans |  |  |
Number of Loans | loan | 3 |  |
Pre-Modification Outstanding Recorded Investment | $ 142 |  |
Post-Modification Outstanding Recorded Investment | $ 207 |  |
Real estate - commercial mortgage |  |  |
Restructured loans |  |  |
Number of Loans | loan | 6 |  | 2
Pre-Modification Outstanding Recorded Investment | $ 3,418 |  | $ 94
Post-Modification Outstanding Recorded Investment | $ 3,369 |  | $ 89
Real estate - commercial mortgage | Owner Occupied |  |  |
Restructured loans |  |  |
Number of Loans | loan | 3 |  |
Pre-Modification Outstanding Recorded Investment | $ 3,019 |  |
Post-Modification Outstanding Recorded Investment | $ 2,970 |  |
Real estate - commercial mortgage | Non-owner Occupied |  |  |
Restructured loans |  |  |
Number of Loans | loan | 2 |  |
Pre-Modification Outstanding Recorded Investment | $ 210 |  |
Post-Modification Outstanding Recorded Investment | $ 210 |  |
Real estate - commercial mortgage | Land Development |  |  |
Restructured loans |  |  |
Number of Loans | loan | 1 |  |
Pre-Modification Outstanding Recorded Investment | $ 189 |  |
Post-Modification Outstanding Recorded Investment | $ 189 |  |
Installment loans to individuals |  |  |
Restructured loans |  |  |
Number of Loans | loan | 2 |  |
Pre-Modification Outstanding Recorded Investment | $ 24 |  |
Post-Modification Outstanding Recorded Investment | $ 21 |  |

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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 http://asc.fasb.org/extlink&oid=121611835&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 http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
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- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + 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 http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
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