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Fair Value Disclosures - Fair Value of Assets Measured on Non-recurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | $ 14,481 | $ 12,220
Impaired Loans | Commercial real estate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 5,450 | 42
Impaired Loans | Construction, land development, land |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 93 |
Impaired Loans | 1-4 family residential properties |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 98 | 85
Impaired Loans | Farmland |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 842 |
Impaired Loans | Commercial Loans |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 2,124 | 7,785
Impaired Loans | Factored receivables |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 4,925 | 3,777
Impaired Loans | Consumer |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 63 | 191
Impaired Loans | PCI |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 67 |
Other real estate owned | Commercial real estate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 819 | 138
Other real estate owned | Construction, land development, land |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring |  | 202
Level 3 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 14,481 | 12,220
Level 3 | Impaired Loans | Commercial real estate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 5,450 | 42
Level 3 | Impaired Loans | Construction, land development, land |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 93 |
Level 3 | Impaired Loans | 1-4 family residential properties |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 98 | 85
Level 3 | Impaired Loans | Farmland |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 842 |
Level 3 | Impaired Loans | Commercial Loans |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 2,124 | 7,785
Level 3 | Impaired Loans | Factored receivables |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 4,925 | 3,777
Level 3 | Impaired Loans | Consumer |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 63 | 191
Level 3 | Impaired Loans | PCI |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | 67 |
Level 3 | Other real estate owned | Commercial real estate |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring | $ 819 | 138
Level 3 | Other real estate owned | Construction, land development, land |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure, Nonrecurring |  | $ 202

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