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Loans and Allowance for Loan Losses - Impaired Loan Portfolio (Details) - Non PCI Loans [Member] - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | $ 1,285 | $ 1,851
Impaired loans without a valuation allowance, Unpaid Principal Balance | 1,303 | 1,879
Impaired loans without a valuation allowance, Average Recorded Investment | 1,570 | 4,659
Impaired loans without a valuation allowance, Interest Income Recognized | 10 | 180
Impaired loans with a valuation allowance, Recorded Investment | 789 | 164
Impaired loans with a valuation allowance, Unpaid Principal Balance | 887 | 243
Impaired loans with a valuation allowance, Related Allowance | 72 | 4
Impaired loans with a valuation allowance, Average Recorded Investment | 477 | 306
Impaired loans with a valuation allowance, Interest Income Recognized | 5 | 70
Total impaired loans, Recorded Investment | 2,074 | 2,015
Total impaired loans, Unpaid Principal Balance | 2,190 | 2,122
Total impaired loans, Average Recorded Investment | 2,047 | 4,965
Total impaired loans, Interest Income Recognized | 15 | 250
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 238 | 119
Impaired loans without a valuation allowance, Unpaid Principal Balance | 241 | 119
Impaired loans without a valuation allowance, Average Recorded Investment | 179 | 1,311
Impaired loans without a valuation allowance, Interest Income Recognized | 3 | 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 | 368 | 821
Impaired loans without a valuation allowance, Unpaid Principal Balance | 383 | 849
Impaired loans without a valuation allowance, Average Recorded Investment | 595 | 2,334
Impaired loans without a valuation allowance, Interest Income Recognized | 6 | 100
Impaired loans with a valuation allowance, Recorded Investment | 625 | 0
Impaired loans with a valuation allowance, Unpaid Principal Balance | 644 | 0
Impaired loans with a valuation allowance, Related Allowance | 68 | 0
Impaired loans with a valuation allowance, Average Recorded Investment | 313 | 0
Impaired loans with a valuation allowance, Interest Income Recognized | 5 | 0
Construction and Land Development [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired loans without a valuation allowance, Recorded Investment | 634 | 865
Impaired loans without a valuation allowance, Unpaid Principal Balance | 634 | 865
Impaired loans without a valuation allowance, Average Recorded Investment | 750 | 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 | 45 | 46
Impaired loans without a valuation allowance, Unpaid Principal Balance | 45 | 46
Impaired loans without a valuation allowance, Average Recorded Investment | 46 | 47
Impaired loans without a valuation allowance, Interest Income Recognized | 1 | 4
Impaired loans with a valuation allowance, Recorded Investment | 164 | 164
Impaired loans with a valuation allowance, Unpaid Principal Balance | 243 | 243
Impaired loans with a valuation allowance, Related Allowance | 4 | 4
Impaired loans with a valuation allowance, Average Recorded Investment | 164 | 306
Impaired loans with a valuation allowance, Interest Income Recognized | 0 | 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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