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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Impaired Financing Receivables (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment with specific reserves | $ 3,608 | $ 1,671
Unpaid Principal Balance with specific reserves | 3,608 | 1,699
Interest Income Recognized with specific reserves | 17 | 5
Specific Reserve with specific reserves | 1,061 | 782
Recorded Investment | 4,761 | 1,740
Recorded Investment with no specific reserve | 2,595 | 2,643
Unpaid Principal Balance with no specific reserve | 3,331 | 3,411
Interest Income Recognized with no specific reserve | 11 | 50
Average Recorded Investment with no specific reserve | 3,468 | 3,528
Consumer |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment with specific reserves | 100 | 160
Unpaid Principal Balance with specific reserves | 100 | 160
Interest Income Recognized with specific reserves |  | 5
Specific Reserve with specific reserves | 29 | 52
Recorded Investment | 137 | 205
Recorded Investment with no specific reserve |  | 49
Unpaid Principal Balance with no specific reserve |  | 49
Indirect |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment with no specific reserve | 144 | 88
Unpaid Principal Balance with no specific reserve | 144 | 88
Commercial |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment with specific reserves | 214 | 217
Unpaid Principal Balance with specific reserves | 214 | 217
Interest Income Recognized with specific reserves | 3 |
Specific Reserve with specific reserves | 214 | 217
Recorded Investment | 215 | 223
Recorded Investment with no specific reserve |  | 2
Unpaid Principal Balance with no specific reserve |  | 2
Average Recorded Investment with no specific reserve |  | 2
Construction |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment with no specific reserve | 236 | 318
Unpaid Principal Balance with no specific reserve | 236 | 318
Average Recorded Investment with no specific reserve | 236 | 322
Commercial Real Estate |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment with specific reserves | 2,000 |
Unpaid Principal Balance with specific reserves | 2,000 |
Interest Income Recognized with specific reserves | 14 |
Specific Reserve with specific reserves | 305 |
Recorded Investment | 3,103 |
Recorded Investment with no specific reserve | 1,238 | 1,194
Unpaid Principal Balance with no specific reserve | 1,548 | 1,194
Interest Income Recognized with no specific reserve | 9 | 39
Average Recorded Investment with no specific reserve | 1,666 | 1,632
Residential Real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment with specific reserves | 1,294 | 1,294
Unpaid Principal Balance with specific reserves | 1,294 | 1,322
Specific Reserve with specific reserves | 513 | 513
Recorded Investment | 1,306 | 1,312
Recorded Investment with no specific reserve | 977 | 992
Unpaid Principal Balance with no specific reserve | 1,403 | 1,760
Interest Income Recognized with no specific reserve | 2 | 11
Average Recorded Investment with no specific reserve | $ 1,566 | $ 1,572

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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5258-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5212-111524 + Details
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