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FAIR VALUE - Summary of Additional Qualitative Information (Details) - Fair Value, Measurements, Nonrecurring - Impaired loans $ in Thousands | Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
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Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) |  | 0.00
Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) |  | 0.20
Measurement Input, Discount Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) | 0.06 |
Measurement Input, Discount Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) | 0.20 |
Appraisal of collateral |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Fair Value Estimate | $ 3,266 | $ 7,173
Appraisal of collateral | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) |  | 0.07
Appraisal of collateral | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) |  | 0.75
Appraisal of collateral | Measurement Input, Discount Rate | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) | 0.05 |
Appraisal of collateral | Measurement Input, Discount Rate | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Servicing asset, measurement Input (percent) | 0.75 |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Value of input used to measure servicing asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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