FHLB ADVANCES AND OTHER BORROWINGS - Summary of FHLB Advances (Details) - USD ($) $ in Thousands |
Mar. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 498,000 | $ 258,000 |
| FHLB advances, collateral for mortgage and home equity line of credit loans | 3,100,000 | 3,230,000 |
| Line of credit facility, maximum borrowing capacity | 1,020,000 | |
| Midland States Bank | Fixed rate fixed term maturing October 2029 | ||
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 133,000 | $ 133,000 |
| Interest rate | 4.50% | 4.50% |
| Midland States Bank | Putable fixed rate maturing through May 2029 | ||
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 125,000 | $ 125,000 |
| Interest rate | 3.69% | 3.69% |
| Midland States Bank | Short term fixed rate matured December 2024 | ||
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 240,000 | $ 0 |
| Interest rate | 4.44% |