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SECURITIES - Narrative (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) bonds debt_security | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Investment [Line Items] |  |  |
Debt Securities, Held-to-maturity, Nonaccrual | $ 0 | $ 0 |
Interest receivable | 46,724,000 | 50,489,000 |
Transferred Securities, Unrealized Loss, Before Tax | 105,100,000 | 113,500,000 |
Securities Transferred, Unrealized Loss, Net Of Tax | 83,000,000.0 | 89,700,000 |
Fair value of securities transferred from AFS to HTM | 0 | 0 |
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract] |  |  |
Net gain (loss) on sale of securities available for sale | (2,510,000) | (15,976,000) | $ (3,819,000)
Gross realized gains on AFS securities | 88,000 | 2,000,000.0 |
Gross realized loss on AFS securities | 6,100,000 | 24,500,000 |
Gain (loss) on hedging activity | 3,500,000 | 6,500,000 |
Equity investments | 9,467,000 | 9,691,000 |
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract] |  |  |
Proceeds from sale of held-to-maturity securities | 0 | 0 | 0
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 | 0 |
Other-than-temporarily impaired equity investments | 0 |  |
FHLB Stock with other-than-temporary impairment | 0 |  |
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Credit Loss Expense (Reversal) | $ 0 | 0 |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | debt_security | 421 |  |
Net gain on sale of equity securities | $ 0 | 5,058,000 | 0
Held-To-Maturity Securities, Number Of Bonds Below Investment Grade | bonds | 2 |  |
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss | $ 13,600,000 | 15,400,000 |
U.S. Treasury | 8,538,000 | 11,331,000 | $ 271,000
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss | $ 12,900,000 | $ 13,700,000 |
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Interest receivable | Interest receivable |
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Interest receivable | Interest receivable |
Asset Pledged as Collateral |  |  |
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract] |  |  |
Debt Securities | $ 2,180,000,000 | $ 2,280,000,000 |
Asset Pledged As Collateral, Excess Amount |  |  |
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract] |  |  |
Debt Securities | 431,700,000 | 213,100,000 |
Financial Asset, Past Due |  |  |
Debt Securities, Held-to-maturity, Sale or Transfer of Investment [Abstract] |  |  |
Securities HTM (estimated fair value of $138,879) | $ 0 | $ 0 |

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