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ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) loan borrower | Dec. 31, 2020 USD ($) borrower | Dec. 31, 2019 USD ($) loan
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan amount of credit quality analysis | $ 250,000 |  |
Loans receivable before allowance for credit loss | 4,287,841,000 |  |
Loans modified In troubled debt restructured loans | 2,200,000 |  |
Increase in allowance for loan loss | $ (423,000) |  | $ (484,000)
Number of loans modified | loan | 8 |  | 1
Financing receivable, loan portfolio, deferrals, COVID-19 | $ 11,000 | $ 100,700,000 |
Financing receivable, loan portfolio, deferrals, COVID-19, borrowers | borrower |  | 49 |
Financing receivable, loan portfolio, deferrals, COVID-19, percentage of loan portfolio (as a percent) |  | 2.20% |
Financing Receivable, Loan Portfolio, Deferrals, COVID-19, Period |  | 90 days |
Construction and land development loans |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loans modified In troubled debt restructured loans |  |  | $ 2,400,000
Number of loans modified | loan |  |  | 5
Total commercial loans |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing receivable, loan portfolio, deferrals, COVID-19 |  | $ 98,200,000 |
Financing receivable, loan portfolio, deferrals, COVID-19, borrowers | borrower |  | 22 |
Financing receivable, loan portfolio, deferrals, COVID-19, percentage of loan portfolio (as a percent) |  | 2.30% |
Loans under second deferral action |  | $ 22,800,000 |
Loans under third deferral action |  | 41,900,000 |
Loans under fourth deferral action |  | 24,100,000 |
Loans under first deferral action |  | 11,900,000 |
Total consumer loans |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loans modified In troubled debt restructured loans | $ 5,800,000 | 5,500,000 |
Financing receivable, loan portfolio, deferrals, COVID-19 |  | $ 2,500,000 |
Financing receivable, loan portfolio, deferrals, COVID-19, borrowers | borrower | 1 | 27 |
Financing receivable, loan portfolio, deferrals, COVID-19, percentage of loan portfolio (as a percent) |  | 0.70% |
PPP | Pass |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loans receivable before allowance for credit loss | $ 26,200,000 |  |
Commercial real estate |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Financing receivable, loan portfolio, deferrals, COVID-19, borrowers | borrower |  | 2 |
Financing Receivable Loan Portfolio Deferrals Covid19 Loans Under Fourth Deferral Action, Percentage |  | 90.00% |
Commercial Real Estate and Multi-family Residential |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loans modified In troubled debt restructured loans |  |  | $ 1,900,000
Number of loans modified | loan |  |  | 3

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