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Loans - Loans by Class Modified as Troubled Debt Restructurings (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan | Dec. 31, 2018 USD ($) loan
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan | 11 |  |
Pre-Modification Outstanding Recorded Investment | $ 5,439 |  |
Post-Modification Outstanding Recorded Investment | $ 5,439 |  |
Owner-occupied, nonfarm nonresidential properties |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan | 1 |  |
Pre-Modification Outstanding Recorded Investment | $ 260 |  |
Post-Modification Outstanding Recorded Investment | $ 260 |  |
Commercial and Industrial |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan | 6 |  |
Pre-Modification Outstanding Recorded Investment | $ 1,140 |  |
Post-Modification Outstanding Recorded Investment | $ 1,140 |  |
Other construction loans and all land development and other land loans |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan | 1 |  |
Pre-Modification Outstanding Recorded Investment | $ 46 |  |
Post-Modification Outstanding Recorded Investment | $ 46 |  |
Non-owner occupied, nonfarm nonresidential properties |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan | 1 |  |
Pre-Modification Outstanding Recorded Investment | $ 3,684 |  |
Post-Modification Outstanding Recorded Investment | $ 3,684 |  |
Residential Mortgages secured by first liens |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan | 2 |  |
Pre-Modification Outstanding Recorded Investment | $ 309 |  |
Post-Modification Outstanding Recorded Investment | $ 309 |  |
Trouble Debt Restructuring |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan |  | 1 | 5
Pre-Modification Outstanding Recorded Investment |  | $ 383 | $ 1,570
Post-Modification Outstanding Recorded Investment |  | $ 383 | $ 1,570
Trouble Debt Restructuring | Commercial, industrial, and agricultural |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan |  | 0 | 0
Pre-Modification Outstanding Recorded Investment |  | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment |  | $ 0 | $ 0
Trouble Debt Restructuring | Commercial mortgages |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan |  | 1 | 5
Pre-Modification Outstanding Recorded Investment |  | $ 383 | $ 1,570
Post-Modification Outstanding Recorded Investment |  | $ 383 | $ 1,570
Trouble Debt Restructuring | Residential Real Estate |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan |  | 0 | 0
Pre-Modification Outstanding Recorded Investment |  | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment |  | $ 0 | $ 0
Trouble Debt Restructuring | Consumer |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan |  | 0 | 0
Pre-Modification Outstanding Recorded Investment |  | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment |  | $ 0 | $ 0
Trouble Debt Restructuring | Credit Cards |  |  |
Schedule Of Financial Receivables [Line Items] |  |  |
Number of Loans | loan |  | 0 | 0
Pre-Modification Outstanding Recorded Investment |  | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment |  | $ 0 | $ 0

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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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