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FAIR VALUE - Schedule of Additional Qualitative Information (Detail) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Impaired loans | Appraisal of Collateral |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Estimate | $ 7,173 | $ 4,350
Impaired loans | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate | 0.00% | 0.00%
Impaired loans | Minimum | Appraisal of Collateral |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate | 7.00% | 10.00%
Impaired loans | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate | 20.00% | 41.00%
Impaired loans | Maximum | Appraisal of Collateral |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate | 75.00% | 75.00%
Foreclosed real estate | Appraisal of Collateral |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Fair Value Estimate |  | $ 88
Foreclosed real estate | Minimum |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate |  | 10.00%
Foreclosed real estate | Minimum | Appraisal of Collateral |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate |  | 13.00%
Foreclosed real estate | Maximum |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate |  | 18.00%
Foreclosed real estate | Maximum | Appraisal of Collateral |  |
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |
Discount Rate |  | 17.00%

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&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 Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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