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Long-term Debt - Narrative (Details) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 facility | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Maturities of Long-Term Debt [Abstract] |  |  |
FHLB prepayment |  | $ 0 | $ 0
Long-term debt outstanding |  | 23,603 | 59,003
Letter of credit outstanding, amount |  | $ 156,000 | $ 153,500
Number of lease agreement under non-cancelable finance lease | facility | 1 |  |

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- Definition Federal home loan bank advances prepayment + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Number of lease agreement under non cancelable finance lease. + References No definition available. + Details
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Namespace Prefix: | mpb_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-2 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- References No definition available. + Details
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