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Leases - Narrative (Details) - Operating and Finance Leases Related Party - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Lessee Lease Description [Line Items] |  |  |
Rent expense paid to related parties | $ 185 | $ 274 | $ 274
2026 | 178 |  |
2027 | 178 |  |
2028 | 178 |  |
2029 | 178 |  |
2030 | 181 |  |
Thereafter | $ 457 |  |

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- Definition Lessee operating and finance lease liability payments due after year five. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lessee operating and finance lease liability payments due next twelve months. + References No definition available. + Details
Name: | mpb_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueNextTwelveMonths
Namespace Prefix: | mpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Lessee operating and finance lease liability payments due year five. + References No definition available. + Details
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Namespace Prefix: | mpb_
Data Type: | xbrli:monetaryItemType
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- Definition Lessee operating and finance lease liability payments due year four. + References No definition available. + Details
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Namespace Prefix: | mpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Lessee operating and finance lease liability payments due year three. + References No definition available. + Details
Name: | mpb_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDueYearThree
Namespace Prefix: | mpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Lessee operating and finance lease liability payments due year two. + References No definition available. + Details
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Namespace Prefix: | mpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Operating and finance leases rent expense net. + References No definition available. + Details
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Namespace Prefix: | mpb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- 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/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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- Details
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