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INVESTMENT BORROWINGS - TERMS OF THE BORROWINGS FROM THE FHLB (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 2,441.7 | $ 2,188.8
Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | 2,441.7 |
Borrowings Due September 2025 at 4.740% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 125.0 |
Interest rate | 4.74% |
Borrowings Due January 2026 at 4.768% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.768% |
Borrowings Due January 2026 at 4.741% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.741% |
Borrowings Due January 2026 at 4.700% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.70% |
Borrowings Due May 2026 at 4.816% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 5.0 |
Interest rate | 4.816% |
Borrowings Due May 2026 at 4.590% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 21.8 |
Interest rate | 4.59% |
Borrowings Due May 2026 at 4.660% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.66% |
Borrowings Due November 2026 at 4.864% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 10.0 |
Interest rate | 4.864% |
Borrowings Due December 2026 at 4.674% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 75.0 |
Interest rate | 4.674% |
Borrowings Due January 2027 at 4.627% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 75.0 |
Interest rate | 4.627% |
Borrowings Due January 2027 at 4.688% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.688% |
Borrowings Due January 2027 at 4.717% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.717% |
Borrowings Due February 2027 at 4.718% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.718% |
Borrowings Due April 2027 at 4.574% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.574% |
Borrowings Due May 2027 at 4.584% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.584% |
Borrowings Due June 2027 at 4.760% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.76% |
Borrowings Due June 2027 at 4.983% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 10.0 |
Interest rate | 4.983% |
Borrowings Due July 2027 at 4.741% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 15.5 |
Interest rate | 4.741% |
Borrowings Due July 2027 at 4.944% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.944% |
Borrowings Due July 2027 at 4.961% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.961% |
Borrowings Due September 2027 at 4.916% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 12.5 |
Interest rate | 4.916% |
Borrowings Due November 2027 at 4.736% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 57.7 |
Interest rate | 4.736% |
Borrowings Due December 2027 Rate at 4.742% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.742% |
Borrowings Due December 2027 Rate at 4.758% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.758% |
Borrowings Due December 2027 Rate at 4.751% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.751% |
Borrowings Due January 2028 at 4.716% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 75.0 |
Interest rate | 4.716% |
Borrowings Due January 2028 at 4.706% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 134.5 |
Interest rate | 4.706% |
Borrowings Due January 2028 at 4.728% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.728% |
Borrowings Due January 2028 at 4.782% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.782% |
Borrowings Due January 2028 at 4.694% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.694% |
Borrowings Due February 2028 at 4.785% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.785% |
Borrowings Due February 2028 at 4.702% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 21.0 |
Interest rate | 4.702% |
Borrowings Due February 2028 at 4.772% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 22.0 |
Interest rate | 4.772% |
Borrowings Due February 2028 at 4.738% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.738% |
Borrowings Due July 2028 at 4.771% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 27.0 |
Interest rate | 4.771% |
Borrowings Due July 2028 at 4.770% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 15.0 |
Interest rate | 4.77% |
Borrowings Due August 2028 at 4.780% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 35.0 |
Interest rate | 4.78% |
Borrowings Due September 2028 at 5.012% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 12.5 |
Interest rate | 5.012% |
Borrowings Due May 2029 at 4.876% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 42.2 |
Interest rate | 4.876% |
Borrowings Due April 2030 at 4.904% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.904% |
Borrowings Due May 2030 at 4.894% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.894% |
Borrowings Due May 2030 at 4.905% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.905% |
Borrowings Due May 2030 at 4.912% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.912% |

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