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DERIVATIVE FINANCIAL INSTRUMENTS - Summary of the interest-rate swaps designated as cash flow hedges (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Interest Rate Swap |  |  |
Balances carried in AOCI |  |  |
Unrealized gains (losses) on cash flow hedges, net of tax | $ 0 | $ 0 |
Cash Flow Hedging | Interest Rate Swap |  |  |
Balances carried in AOCI |  |  |
Unrealized gains (losses) on cash flow hedges, net of tax | (20,272) |  | $ (16,694)
Cash Flow Hedging | Interest Rate Swap | Other assets |  |  |
Gross aggregate fair value of the swaps |  |  |
Gross aggregate fair value of swap assets | 1,178 |  | 1,293
Cash Flow Hedging | Interest Rate Swap | Other liabilities |  |  |
Gross aggregate fair value of the swaps |  |  |
Gross aggregate fair value of swap liabilities | 30,303 |  | 25,411
Cash Flow Hedging | Debt Swap |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ 50,000 |  | $ 50,000
Weighted average fixed pay/receive rates | 1.79% |  | 1.79%
Weighted average variable interest rates | 5.62% |  | 5.61%
Weighted average maturity | 5 months 15 days |  | 8 months 15 days
Cash Flow Hedging | Loan Swap |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ 300,000 |  | $ 300,000
Weighted average fixed pay/receive rates | 4.81% |  | 4.81%
Weighted average variable interest rates | 8.50% |  | 8.50%
Weighted average maturity | 4 years 10 months 6 days |  | 5 years 1 month 6 days
Cash Flow Hedging | SOFR Loan Swap |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ 100,000 |  | $ 0
Weighted average fixed pay/receive rates | 3.72% |  | 0.00%
Weighted average maturity | 4 years 11 months 4 days |  |

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