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Loans and Allowance for Credit Losses - Loan Portfolio by Impairment Methodology (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | $ 920,056 | $ 917,103
Ending balance: individually evaluated for impairment | 4,683 | 5,909
Ending balance: collectively evaluated for impairment | 915,373 | 911,194
Commercial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | 107,960 | 109,531
Ending balance: individually evaluated for impairment | 314 | 348
Ending balance: collectively evaluated for impairment | 107,646 | 109,183
Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | 699,745 | 699,576
Ending balance: individually evaluated for impairment | 3,217 | 4,215
Ending balance: collectively evaluated for impairment | 696,528 | 695,361
Consumer |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Loans | 112,351 | 107,996
Ending balance: individually evaluated for impairment | 1,152 | 1,346
Ending balance: collectively evaluated for impairment | $ 111,199 | $ 106,650

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