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INVESTMENT BORROWINGS - TERMS OF THE BORROWINGS FROM THE FHLB (Details) - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 2,691.7 | $ 2,441.7
Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | 2,691.7 |
Borrowings Due May 2026 at 4.056% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 5.0 |
Interest rate | 4.056% |
Borrowings Due May 2026 at 4.052% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 21.8 |
Interest rate | 4.052% |
Borrowings Due May 2026 at 3.900% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 3.90% |
Borrowings Due November 2026 at 4.104% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 10.0 |
Interest rate | 4.104% |
Borrowings Due December 2026 at 4.097% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 75.0 |
Interest rate | 4.097% |
Borrowings Due January 2027 at 3.982% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 75.0 |
Interest rate | 3.982% |
Borrowings Due January 2027 at 4.058% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.058% |
Borrowings Due January 2027 at 4.174% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.174% |
Borrowings Due February 2027 at 4.128% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.128% |
Borrowings Due April 2027 at 4.013% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.013% |
Borrowings Due May 2027 at 4.023% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.023% |
Borrowings Due June 2027 at 4.000% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.00% |
Borrowings Due June 2027 at 4.223% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 10.0 |
Interest rate | 4.223% |
Borrowings Due July 2027 at 4.187% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 15.5 |
Interest rate | 4.187% |
Borrowings Due July 2027 at 4.383% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.383% |
Borrowings Due September 2027 at 4.156% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 12.5 |
Interest rate | 4.156% |
Borrowings Due November 2027 at 4.183% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 57.7 |
Interest rate | 4.183% |
Borrowings Due December 2027 at 4.172% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.172% |
Borrowings Due December 2027 at 4.168% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.168% |
Borrowings Due December 2027 at 4.197% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.197% |
Borrowings Due January 2028 at 4.151% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 75.0 |
Interest rate | 4.151% |
Borrowings Due January 2028 at 4.141% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 134.5 |
Interest rate | 4.141% |
Borrowings Due January 2028 at 4.098% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.098% |
Borrowings Due January 2028 at 4.212% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.212% |
Borrowings Due January 2028 at 4.095% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.095% |
Borrowings Due February 2028 at 4.148% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.148% |
Borrowings Due February 2028 at 4.132% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 21.0 |
Interest rate | 4.132% |
Borrowings Due February 2028 at 4.141% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 22.0 |
Interest rate | 4.141% |
Borrowings Due February 2028 at 4.148% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.148% |
Borrowings Due July 2028 at 4.217% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 27.0 |
Interest rate | 4.217% |
Borrowings Due July 2028 at 4.010% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 15.0 |
Interest rate | 4.01% |
Borrowings Due August 2028 at 4.020% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 35.0 |
Interest rate | 4.02% |
Borrowings Due September 2028 at 4.252% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 12.5 |
Interest rate | 4.252% |
Borrowings Due May 2029 at 4.311% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 42.2 |
Interest rate | 4.311% |
Borrowings Due August 2029 at 4.307% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.307% |
Borrowings Due April 2030 at 4.305% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.305% |
Borrowings Due May 2030 at 4.333% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.333% |
Borrowings Due May 2030 at 4.268% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.268% |
Borrowings Due May 2030 at 4.281% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.281% |
Borrowings Due September 2030 at 4.130% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 125.0 |
Interest rate | 4.13% |
Borrowings Due January 2031 at 4.127% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.127% |
Borrowings Due January 2031 at 4.222% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 50.0 |
Interest rate | 4.222% |
Borrowings Due January 2031 at 4.171% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.171% |
Borrowings Due February 2031 at 4.219% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 150.0 |
Interest rate | 4.219% |
Borrowings Due February 2031 at 4.264% | Federal Home Loan Bank Advances |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Investment borrowings | $ 100.0 |
Interest rate | 4.264% |

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