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ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Additional Information (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2024 USD ($) loan | Dec. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan amount of credit quality analysis | $ 250,000 |  |
Loans receivable before allowance for credit loss | 4,997,559,000 | $ 4,997,559,000 | $ 4,916,534,000
PPP | Pass |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loans receivable before allowance for credit loss | $ 1,200,000 | $ 1,200,000 | $ 1,300,000
Working capital lines of credit loans | Commercial and industrial loans: | 30-59 Days Past Due |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Number of loans modified | loan |  | 1 |

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