Contractual payment of principal or interest past due period.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Financing Receivable Deferred Fees And Costs

+ References

No definition available.

+ Details

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Namespace Prefix:	mpb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Financing receivable modifications number of additional contracts.

+ References

No definition available.

+ Details

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Namespace Prefix:	mpb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Loan maturity period.

+ References

No definition available.

+ Details

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

- Definition

Mortgage lines of credit period.

+ References

No definition available.

+ Details

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

- Definition

Non mortgage lines of credit period.

+ References

No definition available.

+ Details

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

- Definition

Non-residential loans and lease charged off period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of consumer mortgage loans secured by residential real estate properties foreclosure proceedings in process.

+ References

No definition available.

+ Details

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Namespace Prefix:	mpb_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of property securing loan.

+ References

No definition available.

+ Details

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Namespace Prefix:	mpb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

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-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

No definition available.

+ Details

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

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects the amount of the write-down related to a troubled debt restructuring.

+ References

+ Details

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

- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL49126937-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10(4))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant

- Details

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- Details

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- Details

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- Details

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Name:	us-gaap_LoanToValueAxis=us-gaap_LtvLessThan80PercentMember
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Loans and Allowance for Loan and Lease Losses (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($) Loan	Jun. 30, 2016 USD ($) Loan	Jun. 30, 2017 USD ($) Loan	Jun. 30, 2016 USD ($) Loan	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Contractual payment of principal or interest past due period for discontinuing accrual of interest			90 days
Financing Receivable, Allowance for Credit Losses	$ 7,713,000	$ 6,912,000	$ 7,713,000	$ 6,912,000	$ 7,620,000	$ 7,183,000	$ 6,439,000	$ 6,168,000
Non-residential loans and lease charged off period			120 days
Financing Receivable Deferred Fees And Costs	435,000		$ 435,000			196,000
Financing Receivable, Modifications, Recorded Investment	$ 3,030,000		3,030,000			3,515,000
Charge-offs associated with troubled debt restructured loans			$ 0	$ 0
Number of troubled debt restructured loans \| Loan	0	0	0	0
Number of additional troubled debt restructured loans \| Loan	0	0	0	0
Other Real Estate	$ 0		$ 0			57,000
Number of consumer mortgage loans foreclosure proceedings in process \| Loan			3
Loans for which formal foreclosure proceedings are in process	140,000		$ 140,000
Accruing [Member] \| One Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment	503,000		503,000
Accruing [Member] \| Five Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment						877,000
Nonaccruing [Member] \| Ten Loans With Four Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,473,000		2,473,000			2,638,000
Nonaccruing [Member] \| Two Large Relationships [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment	2,057,000		$ 2,057,000			2,170,000
Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum loan maturity period			30 years
Residential Mortgage [Member] \| Residential Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	539,000	$ 521,000	$ 539,000	$ 521,000	532,000	541,000	516,000	534,000
Financing Receivable, Modifications, Recorded Investment	623,000		623,000			639,000
Residential Mortgage [Member] \| Accruing [Member] \| Four Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment	557,000		$ 557,000
Residential Mortgage [Member] \| Accruing [Member] \| Four Unrelated Borrowers [Member] \| Residential Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment						571,000
Minimum [Member] \| Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan-to-value ratio			100.00%
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum term on non-mortgage lines of credit			1 year
Commercial and Industrial [Member] \| Commercial Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	$ 1,628,000	1,372,000	$ 1,628,000	1,372,000	1,630,000	1,580,000	1,427,000	1,393,000
Financing Receivable, Modifications, Recorded Investment						5,000
Commercial and Industrial [Member] \| LTV Less than 80 Percent [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan-to-value ratio			80.00%
Private Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan-to-value ratio			85.00%
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Maximum loan maturity period			20 years
Percentage of appraised Value of property securing loan	85.00%		85.00%
Mortgage Lines Of Credit Period			5 years
Financing Receivable, Allowance for Credit Losses	$ 404,000	325,000	$ 404,000	325,000	364,000	379,000	303,000	317,000
Unfunded Lending Commitments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	127,000		127,000			120,000
Commercial Real Estate [Member] \| Commercial Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Allowance for Credit Losses	4,981,000	$ 4,241,000	4,981,000	$ 4,241,000	$ 4,715,000	4,323,000	$ 3,777,000	$ 3,552,000
Financing Receivable, Modifications, Recorded Investment	$ 2,407,000		$ 2,407,000			2,871,000
Commercial Real Estate [Member] \| Accruing [Member] \| Other Borrower [Member] \| Commercial Portfolio [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Financing Receivable, Modifications, Recorded Investment						$ 306,000