Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

Reference 1: 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_FinancingReceivableExcludingAccruedInterestModifiedPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage, excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty to total financing receivables.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-34

Reference 3: 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 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-42

Reference 5: 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_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Details

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

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ExtendedMaturityAndInterestRateReductionMember
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_ResidentialPortfolioSegmentMember
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:

Loans and Allowance for Credit Losses - Loans - Schedule of Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period	$ 0	$ 287	$ 0	$ 379
Interest Only
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period		0		0
Term Extension
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period		0		0
Combination: Interest Only and Term Extension
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period		287		379
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period		$ 287		$ 287
% of Total Class of Financing Receivable		4.00%		0.04%
Commercial and industrial \| Interest Only
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period		$ 0		$ 0
Commercial and industrial \| Term Extension
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period		0		0
Commercial and industrial \| Combination: Interest Only and Term Extension
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period		$ 287		287
Residential mortgage
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				$ 92
% of Total Class of Financing Receivable				0.01%
Residential mortgage \| HELOC and Junior Liens
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				$ 92
% of Total Class of Financing Receivable				0.07%
Residential mortgage \| Interest Only
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				$ 0
Residential mortgage \| Interest Only \| HELOC and Junior Liens
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				0
Residential mortgage \| Term Extension
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				0
Residential mortgage \| Term Extension \| HELOC and Junior Liens
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				0
Residential mortgage \| Combination: Interest Only and Term Extension
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				92
Residential mortgage \| Combination: Interest Only and Term Extension \| HELOC and Junior Liens
Financing Receivable, Modifications [Line Items]
Financing receivable, excluding accrued interest, modified period				$ 92