MORTGAGE SERVICING RIGHTS - Key Assumptions Used in Measuring Fair Value of Mortgage Servicing Rights (Details) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| MORTGAGE SERVICING RIGHTS [Abstract] | ||
| Weighted average constant prepayment rate | 7.27% | 8.81% |
| Weighted average discount rate | 9.71% | 9.70% |
| Weighted average life in years | 7 years 9 months 18 days | 7 years 5 months 4 days |