DERIVATIVE INSTRUMENTS - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| DERIVATIVE INSTRUMENTS | |||||
| Fee income of interest rate swaps and risk participation agreements | $ 200 | $ 600 | $ 1,200 | $ 900 | |
| Cash collateral | 14,800 | 14,800 | $ 14,800 | ||
| Held-to-maturity securities, includes pledged securities that can be sold or repledged of $9,090 and $0, respectively (fair value of $1,372,481 and $1,370,464, respectively) | 1,478,386 | 1,478,386 | 1,454,166 | ||
| Asset Pledged as Collateral with Right [Member] | |||||
| DERIVATIVE INSTRUMENTS | |||||
| Held-to-maturity securities, includes pledged securities that can be sold or repledged of $9,090 and $0, respectively (fair value of $1,372,481 and $1,370,464, respectively) | $ 9,090 | $ 9,090 | $ 0 | ||