Loans and Allowance for Credit Losses - Loans - Schedule of Non-accrual Loans by Classes of the Loan Portfolio Including Loans Acquired With Credit Deterioration (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	$ 3,380	$ 1,678
Financing receivable, no allowance	19,230	12,538
Financing receivable, recorded investment, nonaccrual status	22,610	14,216
Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	2,622	454
Financing receivable, no allowance	11,853	6,133
Financing receivable, recorded investment, nonaccrual status	14,475	6,587
Commercial real estate \| CRE Nonowner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	2,622	361
Financing receivable, no allowance	11,153	4,144
Financing receivable, recorded investment, nonaccrual status	13,775	4,505
Commercial real estate \| CRE Owner Occupied
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	546	1,909
Financing receivable, recorded investment, nonaccrual status	546	1,909
Commercial real estate \| Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	93
Financing receivable, no allowance	154	80
Financing receivable, recorded investment, nonaccrual status	154	173
Commercial real estate \| Farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	0	0
Financing receivable, recorded investment, nonaccrual status	0	0
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	758	1,222
Financing receivable, no allowance	3,894	64
Financing receivable, recorded investment, nonaccrual status	4,652	1,286
Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	0	2,559
Financing receivable, recorded investment, nonaccrual status	0	2,559
Construction \| Residential Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	0	303
Financing receivable, recorded investment, nonaccrual status	0	303
Construction \| Other Construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	0	2,256
Financing receivable, recorded investment, nonaccrual status	0	2,256
Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	2
Financing receivable, no allowance	3,483	3,782
Financing receivable, recorded investment, nonaccrual status	3,483	3,784
Residential mortgage \| 1-4 Family 1st Lien
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	1,028	1,875
Financing receivable, recorded investment, nonaccrual status	1,028	1,875
Residential mortgage \| 1-4 Family Rental
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	2
Financing receivable, no allowance	176	699
Financing receivable, recorded investment, nonaccrual status	176	701
Residential mortgage \| HELOC and Junior Liens
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	2,279	1,208
Financing receivable, recorded investment, nonaccrual status	2,279	1,208
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing receivable, with allowance	0	0
Financing receivable, no allowance	0	0
Financing receivable, recorded investment, nonaccrual status	$ 0	$ 0

Financing Receivable, Excluding Accrued Interest, Nonaccrual, With Allowance

No definition available.

Name:	mpb_FinancingReceivableExcludingAccruedInterestNonaccrualWithAllowance
Namespace Prefix:	mpb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- 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

- 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 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 14
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-14

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-80

+ Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mpb_A14Family1stLienMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mpb_A14FamilyRentalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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