XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.26.1

LOANS AND CREDIT QUALITY - Amortized Cost in Nonaccrual Loans and Loans Past Due 90 Days or More and Still Accruing by Class of Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | $ 16,475 | $ 15,200
Total Nonaccrual | 44,379 | 42,863
Loans Past Due 90 Days or More Still Accruing | 4,098 | 3,943
Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 5,490 | 5,310
Total Nonaccrual | 11,698 | 11,196
Loans Past Due 90 Days or More Still Accruing | 0 | 0
Commercial real estate | Multifamily |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 0 | 3,387
Total Nonaccrual | 0 | 3,387
Loans Past Due 90 Days or More Still Accruing | 0 | 0
Commercial real estate | Non-owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 5,438 | 953
Total Nonaccrual | 17,024 | 12,539
Loans Past Due 90 Days or More Still Accruing | 0 | 0
Commercial real estate | Owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 722 | 1,644
Total Nonaccrual | 722 | 1,870
Loans Past Due 90 Days or More Still Accruing | 0 | 0
Commercial real estate | Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 428 | 140
Total Nonaccrual | 3,225 | 2,962
Loans Past Due 90 Days or More Still Accruing | 0 | 0
Residential Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 4,397 | 3,766
Total Nonaccrual | 8,177 | 6,765
Loans Past Due 90 Days or More Still Accruing | 4,098 | 3,943
Auto |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 0 | 0
Total Nonaccrual | 3,529 | 4,143
Loans Past Due 90 Days or More Still Accruing | 0 | 0
Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Nonaccrual With No Allowance for Credit Loss | 0 | 0
Total Nonaccrual | 4 | 1
Loans Past Due 90 Days or More Still Accruing | $ 0 | $ 0

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 excluding accrued interest, of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-16 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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=srt_MultifamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mchb_NonOwnerOccupiedCommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mchb_OwnerOccupiedCommercialRealEstateMember
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: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mchb_AutoPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=mchb_OtherConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |