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Loans and Allowance for Loan and Lease Losses - Summary of Contractually Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | $ 38,756 | $ 31,674
Past Due 90 Days or More Still Accruing | 2,723 | 1,664
Nonaccrual | 39,744 | 32,149
Total Past Due | 81,223 | 65,487
Purchased Credit Impaired Loans |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due |  | 72
Nonaccrual | 2,221 | 2,333
Total Past Due | 2,221 | 2,405
Commercial real estate |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 3,220 | 1,374
Nonaccrual | 5,875 | 1,012
Total Past Due | 9,095 | 2,386
Construction, land development, land |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 555 |
Nonaccrual | 140 | 136
Total Past Due | 695 | 136
1-4 family residential properties |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 970 | 1,378
Past Due 90 Days or More Still Accruing | 79 | 62
Nonaccrual | 2,094 | 2,625
Total Past Due | 3,143 | 4,065
Farmland |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 2,152 | 250
Past Due 90 Days or More Still Accruing |  | 109
Nonaccrual | 2,744 | 3,412
Total Past Due | 4,896 | 3,771
Commercial Loans |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 5,930 | 6,630
Past Due 90 Days or More Still Accruing | 313 | 39
Nonaccrual | 26,400 | 22,247
Total Past Due | 32,643 | 28,916
Factored receivables |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 25,190 | 20,858
Past Due 90 Days or More Still Accruing | 2,331 | 1,454
Total Past Due | 27,521 | 22,312
Consumer |  |
Accounts Notes And Loans Receivable [Line Items] |  |
30-89 Days Past Due | 739 | 947
Nonaccrual | 270 | 384
Total Past Due | $ 1,009 | 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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