FHLB ADVANCES AND OTHER BORROWINGS - Summary of FHLB Advances (Details) - USD ($) $ in Thousands |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 258,000 | $ 476,000 |
| FHLB advances, collateral for mortgage and home equity line of credit loans | 3,230,000 | 2,980,000 |
| Line of credit facility, maximum borrowing capacity | 1,290,000 | |
| Midland States Bank | Fixed rate fixed term maturing October 2029 | ||
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 133,000 | $ 150,000 |
| Interest rate | 4.50% | 4.94% |
| Midland States Bank | Putable fixed rate maturing through May 2029 | ||
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 125,000 | $ 160,000 |
| Interest rate | 3.69% | 3.07% |
| Midland States Bank | Short term fixed rate matured December 2024 | ||
| FHLB ADVANCES AND OTHER BORROWINGS | ||
| Total FHLB advances and other borrowings | $ 0 | $ 166,000 |
| Interest rate | 5.45% |