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SECURITIES AVAILABLE FOR SALE - Basis for Impairment Conclusion (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) security | Dec. 31, 2022 USD ($)
Debt Securities, Available-for-Sale [Line Items] |  |
Allowance on AFS debt securities | $ | $ 0.0 | $ 0.0
Obligations of US Government-sponsored enterprises |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 8 |
Available for sale securities portfolio, number of securities (security) | 8 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 1.44% |
US Government-sponsored enterprises |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 448 |
Available for sale securities portfolio, number of securities (security) | 493 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 13.64% |
US Government agency |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 130 |
Available for sale securities portfolio, number of securities (security) | 151 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 13.68% |
Private label |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 26 |
Available for sale securities portfolio, number of securities (security) | 28 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 3.05% |
Obligations of states and political subdivisions thereof |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 52 |
Available for sale securities portfolio, number of securities (security) | 69 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 12.48% |
Corporate bonds |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Available-for-sale, securities in unrealized loss positions (security) | 30 |
Available for sale securities portfolio, number of securities (security) | 35 |
Available for sale and held to maturity securities, continuous unrealized loss position, aggregate losses (percentage) | 9.75% |

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