XML 66 R55.htm IDEA: XBRL DOCUMENT v3.25.3

LOANS - Loan Restructuring (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($) loan	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($) loan
Summary of loans
Balance | $	$ 20,681	$ 11,823	$ 22,993	$ 22,424
Count | loan	7	15	18	41
Interest Rate Reduction
Summary of loans
Balance | $	$ 0	$ 77	$ 294	$ 556
Count | loan	0	1	2	3
Term Extension
Summary of loans
Balance | $	$ 12,542	$ 4,897	$ 13,741	$ 8,629
Count | loan	5	3	11	26
Payment Deferral
Summary of loans
Balance | $	$ 120	$ 370	$ 120	$ 6,760
Count | loan	1	5	1	6
Interest Rate Reduction and Term Extension
Summary of loans
Balance | $	$ 8,019	$ 0	$ 8,019	$ 0
Count | loan	1	0	1	0
Interest Rate Reduction and Payment Deferral
Summary of loans
Balance | $	$ 0	$ 893	$ 0	$ 893
Count | loan	0	3	0	3
Term Extension and Payment Deferral
Summary of loans
Balance | $	$ 0	$ 5,586	$ 819	$ 5,586
Count | loan	0	3	3	3
Commercial Loan Portfolio
Summary of loans
Balance | $	$ 20,661	$ 11,464	$ 22,821	$ 19,760
Count | loan	6	12	13	25
Commercial Loan Portfolio | Commercial
Summary of loans
Balance | $	$ 10,901	$ 77	$ 11,949	$ 77
Count | loan	2	2	4	2
Commercial Loan Portfolio | Commercial other
Summary of loans
Balance | $	$ 0	$ 370	$ 845	$ 2,277
Count | loan	0	5	4	17
Commercial Loan Portfolio | Commercial real estate non-owner occupied
Summary of loans
Balance | $	$ 8,069	$ 3,552	$ 8,069	$ 9,941
Count | loan	2	1	2	2
Commercial Loan Portfolio | Commercial real estate owner occupied
Summary of loans
Balance | $	$ 0	$ 6,131	$ 0	$ 6,131
Count | loan	0	3	0	3
Commercial Loan Portfolio | Farmland
Summary of loans
Balance | $	$ 120	$ 0	$ 387	$ 0
Count | loan	1	0	2	0
Commercial Loan Portfolio | Construction and land development
Summary of loans
Balance | $	$ 1,571	$ 1,334	$ 1,571	$ 1,334
Count | loan	1	1	1	1
Residential real estate: | Residential first lien
Summary of loans
Balance | $	$ 20	$ 0	$ 162	$ 65
Count | loan	1	0	4	1
Residential real estate: | Other residential
Summary of loans
Balance | $	$ 0	$ 0	$ 10	$ 82
Count | loan	0	0	1	2
Consumer: | Consumer
Summary of loans
Balance | $	$ 0	$ 11	$ 0	$ 37
Count | loan	0	1	0	2
Lease financing
Summary of loans
Balance | $	$ 0	$ 348	$ 0	$ 2,480
Count | loan	0	2	0	11

X

- Definition

Financing Receivable, Modified in Period, Number of Contracts

+ References

No definition available.

+ Details

Name:	msbi_FinancingReceivableModifiedInPeriodNumberOfContracts
Namespace Prefix:	msbi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-33

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ContractualInterestRateReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=msbi_MaturityDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityAndInterestRateReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=msbi_MaturityDeferralAndInterestRateReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=msbi_ExtendedMaturityAndMaturityDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=msbi_CommercialOtherLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=msbi_CommercialRealEstateNonOwnerOccupiedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=msbi_CommercialRealEstateOwnerOccupiedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=msbi_FarmlandLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=msbi_ConstructionAndLandDevelopmentLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=msbi_OtherResidentialLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_FinanceLeasesPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: