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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Summary of recorded investment amount and related allowance for losses of impaired loans (Details) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) borrower loan | Jun. 30, 2017 borrower | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Financing Receivable, Impaired [Line Items] |  |  |  |
Allowance for loan loss | $ 2,284,000 |  | $ 2,589,000 | $ 2,484,000
Loans outstanding included in current and 30 - 89 days past due | $ 1,000,000 |  |  |
Number of borrowers | borrower | 25 | 38 |  |
Specific Reserve | $ 226,000 |  |  |
Home Equity |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Loans outstanding included in current and 30 - 89 days past due | 159,000 |  |  |
Consumer |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Allowance for loan loss | $ 177,000 |  | 214,000 | 182,000
Number of loans | loan | 2 |  |  |
Amount of consumer and indirect loans, outstanding | $ 96,109 |  |  |
Amount of consumer and indirect loans, specific reserves | $ 26,827 |  |  |
Number of borrowers | borrower | 2 |  |  |
Commercial |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Allowance for loan loss | $ 246,000 |  | 237,000 | 284,000
Loans outstanding included in current and 30 - 89 days past due | 211,000 |  |  |
Specific Reserve | 211,000 |  |  |
Commercial Real Estate |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Allowance for loan loss | 390,000 |  | $ 291,000 | $ 259,000
Loans outstanding included in current and 30 - 89 days past due | $ 646,000 |  |  |

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- Definition Loans And Leases Receivable Consumer And Indirect Loans + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Represents loans and leases receivable consumer and indirect loans + References No definition available. + Details
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- Definition Represents loans outstanding included in the current and 30-89 days past due. + References No definition available. + Details
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- Definition Represents number of borrowers consumer and indirect loans. + References No definition available. + Details
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- Definition Represents number of loans. + References No definition available. + Details
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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + 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 Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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- Details
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- Details
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