XML 71 R60.htm IDEA: XBRL DOCUMENT v3.26.1

LOANS AND CREDIT QUALITY - Loan Modifications, Modified with Subsequent Default (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	$ 8,152
Payment Delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Combined Payment Delay and Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	8,152
Commercial and industrial
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	4,199
Commercial and industrial | Payment Delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Commercial and industrial | Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Commercial and industrial | Combined Payment Delay and Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	4,199
Commercial real estate | Construction and land development
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	2,797
Commercial real estate | Construction and land development | Payment Delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Commercial real estate | Construction and land development | Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Commercial real estate | Construction and land development | Combined Payment Delay and Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	2,797
Residential Real Estate
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	1,156
Residential Real Estate | Payment Delay
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Residential Real Estate | Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	0
Residential Real Estate | Combined Payment Delay and Term Extension
Financing Receivable, Modified, Subsequent Default [Line Items]
Loans modified	$ 1,156

X

- Definition

Amortized cost excluding accrued interest, of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 44
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-44

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestModifiedSubsequentDefault
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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/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://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 44
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-44

+ Details

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

X

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
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=mchb_ExtendedMaturityAndPaymentDeferralMember
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_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
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: