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Loans and Allowance for Loan Losses - Impaired Loan Portfolio (Details) - Non PCI Loans [Member] - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2016
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | $ 1,016 | $ 1,851
Impaired loans without a valuation allowance, Unpaid Principal Balance | 1,027 | 1,879
Impaired loans without a valuation allowance, Average Recorded Investment | 1,239 | 4,659
Impaired loans without a valuation allowance, Interest Income Recognized | 20 | 180
Impaired loans with a valuation allowance, Recorded Investment | 709 | 164
Impaired loans with a valuation allowance, Unpaid Principal Balance | 734 | 243
Impaired loans with a valuation allowance, Related Allowance | 175 | 4
Impaired loans with a valuation allowance, Average Recorded Investment | 602 | 306
Impaired loans with a valuation allowance, Interest Income Recognized | 27 | 70
Total impaired loans, Recorded Investment | 1,725 | 2,015
Total impaired loans, Unpaid Principal Balance | 1,761 | 2,122
Total impaired loans, Average Recorded Investment | 1,841 | 4,965
Total impaired loans, Interest Income Recognized | 47 | 250
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 118 | 119
Impaired loans without a valuation allowance, Unpaid Principal Balance | 124 | 119
Impaired loans without a valuation allowance, Average Recorded Investment | 149 | 1,311
Impaired loans without a valuation allowance, Interest Income Recognized | 7 | 73
Impaired loans with a valuation allowance, Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 | 0
Impaired loans with a valuation allowance, Related Allowance | 0 | 0
Impaired loans with a valuation allowance, Average Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0
Consumer Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 309 | 821
Impaired loans without a valuation allowance, Unpaid Principal Balance | 314 | 849
Impaired loans without a valuation allowance, Average Recorded Investment | 398 | 2,334
Impaired loans without a valuation allowance, Interest Income Recognized | 11 | 100
Impaired loans with a valuation allowance, Recorded Investment | 624 | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 649 | 0
Impaired loans with a valuation allowance, Related Allowance | 100 | 0
Impaired loans with a valuation allowance, Average Recorded Investment | 499 | 0
Impaired loans with a valuation allowance, Interest Income Recognized | 24 | 0
Construction and Land Development [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 547 | 865
Impaired loans without a valuation allowance, Unpaid Principal Balance | 547 | 865
Impaired loans without a valuation allowance, Average Recorded Investment | 648 | 967
Impaired loans without a valuation allowance, Interest Income Recognized | 0 | 3
Impaired loans with a valuation allowance, Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 | 0
Impaired loans with a valuation allowance, Related Allowance | 0 | 0
Impaired loans with a valuation allowance, Average Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 0
Commercial and Industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 42 | 46
Impaired loans without a valuation allowance, Unpaid Principal Balance | 42 | 46
Impaired loans without a valuation allowance, Average Recorded Investment | 44 | 47
Impaired loans without a valuation allowance, Interest Income Recognized | 2 | 4
Impaired loans with a valuation allowance, Recorded Investment | 85 | 164
Impaired loans with a valuation allowance, Unpaid Principal Balance | 85 | 243
Impaired loans with a valuation allowance, Related Allowance | 75 | 4
Impaired loans with a valuation allowance, Average Recorded Investment | 103 | 306
Impaired loans with a valuation allowance, Interest Income Recognized | 3 | 70
Consumer and Other [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 0 | 0
Impaired loans without a valuation allowance, Unpaid Principal Balance | 0 | 0
Impaired loans without a valuation allowance, Average Recorded Investment | 0 | 0
Impaired loans without a valuation allowance, Interest Income Recognized | 0 | 0
Impaired loans with a valuation allowance, Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 0 | 0
Impaired loans with a valuation allowance, Related Allowance | 0 | 0
Impaired loans with a valuation allowance, Average Recorded Investment | 0 | 0
Impaired loans with a valuation allowance, Interest Income Recognized | $ 0 | $ 0

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