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Loans and Allowance for Credit Losses - Loan Portfolio by Impairment Methodology (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | $ 933,229 | $ 899,320
Ending balance: individually evaluated for impairment | 10,660 | 6,366
Ending balance: collectively evaluated for impairment | 922,569 | 892,954
Commercial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | 127,012 | 115,812
Ending balance: individually evaluated for impairment | 367 | 377
Ending balance: collectively evaluated for impairment | 126,645 | 115,435
Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | 702,616 | 677,467
Ending balance: individually evaluated for impairment | 8,973 | 4,846
Ending balance: collectively evaluated for impairment | 693,643 | 672,621
Consumer |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | 103,601 | 106,041
Ending balance: individually evaluated for impairment | 1,320 | 1,143
Ending balance: collectively evaluated for impairment | $ 102,281 | $ 104,898

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