SUBORDINATED DEBT (Details) $ / shares in Units, $ in Thousands			1 Months Ended	12 Months Ended	50 Months Ended
	Jun. 28, 2016 USD ($)	Mar. 26, 2013 USD ($) $ / shares shares	Jun. 30, 2015 USD ($) tranche	Dec. 31, 2016 USD ($)	Oct. 15, 2016	Dec. 31, 2015 USD ($)	Jan. 02, 2013 USD ($)
Subordinated Borrowing [Line Items]
Carrying amount				$ 54,508		$ 61,859
Duration with fixed interest rate				5 years
Debt Instrument, Description of Variable Rate Basis				three month LIBOR	three-month LIBOR
Number of tranches | tranche			2
Investment face amount							$ 10,000
Common stock				$ 155		118	2,000
Term of warrant		8 years
Number of securities called by warrants | shares		125,000
Exercise price | $ / shares		$ 16.00
Warrants outstanding		$ 600
Repayments of Subordinated Debt				$ 8,000
Other non interest expense
Subordinated Borrowing [Line Items]
Discount	$ 500
LIBOR
Subordinated Borrowing [Line Items]
Variable interest rate (as a percent)				4.35%
Subordinate debt
Subordinated Borrowing [Line Items]
Face amount							$ 8,000
Debt issuance costs			$ 900
Repayments of Subordinated Debt	$ 8,000
Discount		$ 600
Subordinate debt | Private Placement
Subordinated Borrowing [Line Items]
Face amount			$ 55,300
Subordinate debt, $8,000 maturing June 28, 2021
Subordinated Borrowing [Line Items]
Fixed interest rate				8.25%
Face amount				$ 8,000
Carrying amount						7,448
Subordinate debt, $40,325 maturing June 18, 2025
Subordinated Borrowing [Line Items]
Fixed interest rate				6.00%
Face amount				$ 40,325
Carrying amount				$ 39,729		39,659
Subordinate debt, $15,000 maturing June 18, 2025
Subordinated Borrowing [Line Items]
Fixed interest rate				6.50%
Face amount				$ 15,000
Carrying amount				14,779		14,752
Midland States Bancorp, Inc
Subordinated Borrowing [Line Items]
Carrying amount				54,508		$ 61,859
Repayments of Subordinated Debt				$ 8,000