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Basis of Presentation	12 Months Ended
	Dec. 31, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	(1) Basis of Presentation The accompanying consolidated financial statements include the accounts of Mid Penn Bancorp, Inc. and its wholly-owned subsidiary Mid Penn Bank (the “Bank”), and the Bank’s former wholly-owned subsidiary Mid Penn Insurance Services, LLC, which was closed, effective March 1, 2016 (collectively, “Mid Penn”).  All material intercompany accounts and transactions have been eliminated in consolidation. Each of Mid Penn’s lines of business are part of the same reporting segment, community banking, whose operating results are regularly reviewed and managed by a centralized executive management group.  As a result, Mid Penn has only one reportable segment for financial reporting purposes. The comparability of the results of operations for the year ended 2017 compared to 2016 and 2015, in general, have been impacted by the acquisition activities of Mid Penn as further described in Note 4.  For comparative purposes, the 2016 and 2015 balances have been reclassified to conform to the 2017 presentation.  Such reclassifications had no impact on net income.

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- Definition

The entire disclosure for the basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-URI http://asc.fasb.org/topic&trid=2122369

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- References

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