FHLB ADVANCES AND OTHER BORROWINGS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2020	Dec. 31, 2019
FHLB ADVANCES AND OTHER BORROWINGS
Total FHLB advances and other borrowings	$ 593,089	$ 493,311
Federal Home Loan Bank Advances, Interest Rate Information
Line of Credit Facility, Maximum Borrowing Capacity	20,000
FHLB advances, collateral for mortgage and home equity line of credit loans	$ 1,950,000	1,940,000
LIBOR
Federal Home Loan Bank Advances, Interest Rate Information
Basis spread on variable rate	435.00%
Series G Preferred Stock
Federal Home Loan Bank Advances, Interest Rate Information
Preferred stock, shares issued	181
Preferred stock, par value	$ 1,000
Midland States Bancorp, Inc \| Series G Preferred Stock
FHLB ADVANCES AND OTHER BORROWINGS
Long term debt	$ 181	181
Midland States Bank \| Fixed Rate Term Loan
FHLB ADVANCES AND OTHER BORROWINGS
Total FHLB advances and other borrowings	592,908	493,130
Midland States Bank \| Fixed rate, fixed term maturing through June 2023
FHLB ADVANCES AND OTHER BORROWINGS
Total FHLB advances and other borrowings	$ 27,800	$ 28,000
Federal Home Loan Bank Advances, Interest Rate Information
FHLB advances interest rate	2.56%	2.56%
Midland States Bank \| Putable fixed rate loan maturing through August 2021
FHLB ADVANCES AND OTHER BORROWINGS
Total FHLB advances and other borrowings	$ 565,000	$ 465,000
Federal Home Loan Bank Advances, Interest Rate Information
FHLB advances interest rate	2.02%	2.34%

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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