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Loans and Allowance for Loan and Lease Losses - Schedule of Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2018 USD ($) loan | Sep. 30, 2017 USD ($) loan
Accounts Notes And Loans Receivable [Line Items] |  |
Number of Loans | loan | 14 |
Pre-Modification Outstanding Recorded Investment | $ 1,249 |
Post-Modification Outstanding Recorded Investment | $ 1,249 |
1-4 family residential properties |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Number of Loans | loan | 3 |
Pre-Modification Outstanding Recorded Investment | $ 111 |
Post-Modification Outstanding Recorded Investment | $ 111 |
Commercial Loans |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Number of Loans | loan | 10 | 5
Pre-Modification Outstanding Recorded Investment | $ 875 | $ 2,184
Post-Modification Outstanding Recorded Investment | $ 875 | $ 2,184
Farmland |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Number of Loans | loan | 1 |
Pre-Modification Outstanding Recorded Investment | $ 263 |
Post-Modification Outstanding Recorded Investment | $ 263 |

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