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FAIR VALUE - Summary of Additional Qualitative Information (Details) - Fair Value, Measurements, Nonrecurring - Impaired loans $ in Thousands	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
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

X

- 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

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X

- 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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X

- 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

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