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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY - Additional Information (Details) | 3 Months Ended
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Mar. 31, 2020 USD ($) loan borrower | Mar. 31, 2019 USD ($) loan
Troubled Debt Restructuring |  |
Increase (decrease) in allowance for loan loss | $ 122,000 |
Loan amount of credit quality analysis | 250,000 |
Financing receivable, loan portfolio, deferrals, COVID-19 | $ 99,800,000 |
Financing receivable, loan portfolio, deferrals, COVID-19, borrowers | borrower | 77 |
Financing receivable, loan portfolio, deferrals, COVID-19, percentage of loan portfolio (as a percent) | 2.00% |
Financing receivable, loan portfolio, deferrals, COVID-19, three-month principal only, percentage of deferrals (as a percent) | 95.00% |
Charge-offs recorded for new troubled debt restructurings | $ 666,000 |
All Modifications [Member] |  |
Troubled Debt Restructuring |  |
Number of Loans | loan | 1 | 1
Commercial Real Estate Building |  |
Troubled Debt Restructuring |  |
Financing Receivable, Modifications, Recorded Investment |  | $ 533,000
Commercial and Industrial Nonworking Capital |  |
Troubled Debt Restructuring |  |
Financing Receivable, Modifications, Recorded Investment |  | $ 70,000
Commercial Loan |  |
Troubled Debt Restructuring |  |
Financing receivable, loan portfolio, deferrals, COVID-19 | $ 99,300,000 |
Financing receivable, loan portfolio, deferrals, COVID-19, borrowers | borrower | 50 |
Financing receivable, loan portfolio, deferrals, COVID-19, percentage of loan portfolio (as a percent) | 3.00% |
Consumer Loan |  |
Troubled Debt Restructuring |  |
Financing receivable, loan portfolio, deferrals, COVID-19 | $ 528,000 |
Financing receivable, loan portfolio, deferrals, COVID-19, borrowers | borrower | 27 |
Financing receivable, loan portfolio, deferrals, COVID-19, percentage of loan portfolio (as a percent) | 1.00% |

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