SUBORDINATED DEBT AND DEBENTURES - Other Key Terms, Subordinated Debentures and Trust Preferred Securities (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| IBC Capital Finance III | |
| Subordinated Debt [Abstract] | |
| Term of variable rate (in months) | 3 months |
| Interest rate spread, percent | 1.86% |
| IBC Capital Finance IV | |
| Subordinated Debt [Abstract] | |
| Term of variable rate (in months) | 3 months |
| Interest rate spread, percent | 3.11% |
| Midwest Guaranty Trust I | |
| Subordinated Debt [Abstract] | |
| Term of variable rate (in months) | 3 months |
| Interest rate spread, percent | 3.71% |
| TCSB Statutory Trust I | |
| Subordinated Debt [Abstract] | |
| Term of variable rate (in months) | 3 months |
| Interest rate spread, percent | 2.46% |