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Revenue Recognition (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Estate fee income service period	18 months

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- Definition

Estate fee income service period.

+ References

No definition available.

+ Details

Name:	mpb_EstateFeeIncomeServicePeriod
Namespace Prefix:	mpb_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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