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Loans and Allowance for Loan and Lease Losses - Summary of Contractually Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | $ 42,162 | $ 31,674
Past Due 90 Days or More Still Accruing | 2,577 | 1,664
Nonaccrual | 33,747 | 32,149
Total Past Due | 78,486 | 65,487
Purchased Credit Impaired Loans |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 206 | 72
Nonaccrual | 2,969 | 2,333
Total Past Due | 3,175 | 2,405
Commercial real estate |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 2,493 | 1,374
Nonaccrual | 7,873 | 1,012
Total Past Due | 10,366 | 2,386
Construction, land development, land |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 769 |
Nonaccrual | 221 | 136
Total Past Due | 990 | 136
1-4 family residential properties |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 1,253 | 1,378
Past Due 90 Days or More Still Accruing | 79 | 62
Nonaccrual | 2,156 | 2,625
Total Past Due | 3,488 | 4,065
Farmland |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due |  | 250
Past Due 90 Days or More Still Accruing |  | 109
Nonaccrual | 3,387 | 3,412
Total Past Due | 3,387 | 3,771
Commercial Loans |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 3,976 | 6,630
Past Due 90 Days or More Still Accruing | 246 | 39
Nonaccrual | 16,865 | 22,247
Total Past Due | 21,087 | 28,916
Factored receivables |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 32,645 | 20,858
Past Due 90 Days or More Still Accruing | 2,252 | 1,454
Total Past Due | 34,897 | 22,312
Consumer |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 820 | 947
Nonaccrual | 276 | 384
Total Past Due | $ 1,096 | 1,331
Mortgage warehouse |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due |  | 165
Total Past Due |  | $ 165

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