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FAIR VALUE - Narrative (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Specific charges to value the real estate owned	$ 0	$ 43,000
Change in fair value of foreclosed real estate	$ 0	43,000	$ 32,000
Short-term borrowings maturity period	90 days
Impaired loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Changes in fair value of impaired loans and foreclosed real estate	$ 867,000	268,000	$ 888,000
Fair Value, Measurements, Recurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value liabilities	0	0
Allowance for loan losses or partial charge-offs	$ 2,266,000	$ 1,967,000

X

- Definition

Impaired financing receivables allocated allowance.

+ References

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X

- Definition

Other Real Estate, Foreclosed Assets, Valuation Adjustment

+ References

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- Definition

Short term borrowing maturity period.

+ References

No definition available.

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X

- Definition

Specific charges to value the real estate owned at the lower of cost or fair value on properties.

+ References

No definition available.

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- Definition

Amount of addition (reduction) to the amount at which an asset could be incurred (settled) in a current transaction between willing parties.

+ References

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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.

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No definition available.

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- Definition

Fair value of financial and nonfinancial obligations.

+ 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

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