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LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Additional Information (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) loan | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) loan | Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Loans receivable | $ 4,492,174,000 |  | $ 4,492,174,000 |  | $ 4,275,178,000
Provision for credit loss expense | 1,056,000 | $ 1,091,000 | 4,751,000 | $ 5,639,000 |
Allowance for unfunded commitments | 33,000 | $ 55,000 | 148,000 | $ 641,000 |
Amortized cost in troubled debt restructurings |  |  |  |  | 12,400,000
Financing receivable, troubled debt restructuring, allowance for loans |  |  |  |  | 2,200,000
Financing receivable, modifications, number of contracts | loan |  | 1 |  | 2 |
Minimum period to be considered for loan to have defaulted |  |  |  | 90 days |
Loans modified as troubled debt restructuring with subsequent defaults | loan |  | 0 |  | 0 |
Principal balances forgiven in connection with loan restructuring |  | $ 0 |  | $ 0 |
Syndicated loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Loans receivable | 123,090,000 |  | 123,090,000 |  | 156,649,000
Unfunded Loan Commitment |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Financing receivable excluding accrued interest modified accumulated |  |  | 167,000 |  |
Commercial and Industrial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Loans receivable | 730,542,000 |  | 730,542,000 |  | 791,911,000
Financing receivable, modifications, number of contracts | loan |  | 1 |  | 1 |
Commercial and Industrial | Syndicated loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Loans receivable | $ 123,100,000 |  | $ 123,100,000 |  | $ 156,600,000

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