LOANS - Pledged Loans (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] | ||
| Unpaid principal balances | $ 1,080.0 | $ 1,100.0 |
| Federal Home Loan Bank of San Francisco | Federal Reserve Bank Advances | ||
| Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward] | ||
| Unpaid principal balances | $ 74.8 | $ 88.0 |