Basis of Presentation	6 Months Ended
Jun. 30, 2021
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. (“Mid Penn” or the “Corporation”), its wholly-owned subsidiary, Mid Penn Bank (the “Bank”), and non-bank subsidiaries which were established during 2020, including MPB Financial Services, LLC, under which two additional non-bank subsidiaries have been established: (i) MPB Wealth Management, LLC, created to expand the wealth management services of the Corporation, and (ii) MPB Risk Services, LLC, created to fulfill the insurance needs of both existing and potential customers of the Corporation. As of June 30, 2021, the accounts and activities of these non-bank subsidiaries established in 2020 were not material to warrant separate disclosure or segment reporting. All material intercompany accounts and transactions have been eliminated in consolidation. Certain information and disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Mid Penn believes the information presented is not misleading, and the disclosures are adequate. For comparative purposes, the balances for the periods ending June 30, 2020 and December 31, 2020 have been reclassified, when necessary, to conform to the 2021 presentation. Such reclassifications had no impact on net income or total shareholders’ equity. The results of operations for interim periods are not necessarily indicative of operating results expected for the full year. Except for adjustments made related to the adoption of new accounting standards, in the opinion of management, all adjustments necessary for fair presentation of the periods presented have been reflected in the accompanying consolidated financial statements. All such adjustments are of a normal, recurring nature. These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2020. On June 30, 2021, Mid Penn entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Riverview Financial Corporation (“Riverview”) pursuant to which Riverview will merge with and into Mid Penn (the “Merger”), with Mid Penn being the surviving corporation in the Merger. Refer to (i) Note 15, Agreement and Plan of Merger; (ii) Part II, Item 1A “Risk Factors”, and (iii) the Form 8-K filed on June 30, 2021, for more information and considerations regarding the proposed Merger. Mid Penn has evaluated events and transactions occurring subsequent to the balance sheet date of June 30, 2021, for items that should potentially be recognized or disclosed in these consolidated financial statements. The evaluation was conducted through the issuance date of these consolidated financial statements.

Basis of Presentation

6 Months Ended

Jun. 30, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

(1)Basis of Presentation

The accompanying consolidated financial statements include the accounts of Mid Penn Bancorp, Inc. (“Mid Penn” or the “Corporation”), its wholly-owned subsidiary, Mid Penn Bank (the “Bank”), and non-bank subsidiaries which were established during 2020, including MPB Financial Services, LLC, under which two additional non-bank subsidiaries have been established: (i) MPB Wealth Management, LLC, created to expand the wealth management services of the Corporation, and (ii) MPB Risk Services, LLC, created to fulfill the insurance needs of both existing and potential customers of the Corporation. As of June 30, 2021, the accounts and activities of these non-bank subsidiaries established in 2020 were not material to warrant separate disclosure or segment reporting. All material intercompany accounts and transactions have been eliminated in consolidation.

Certain information and disclosures normally included in consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Mid Penn believes the information presented is not misleading, and the disclosures are adequate. For comparative purposes, the balances for the periods ending June 30, 2020 and December 31, 2020 have been reclassified, when necessary, to conform to the 2021 presentation. Such reclassifications had no impact on net income or total shareholders’ equity. The results of operations for interim periods are not necessarily indicative of operating results expected for the full year. Except for adjustments made related to the adoption of new accounting standards, in the opinion of management, all adjustments necessary for fair presentation of the periods presented have been reflected in the accompanying consolidated financial statements. All such adjustments are of a normal, recurring nature. These interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Corporation’s Annual Report on Form 10-K for the year ended December 31, 2020.

On June 30, 2021, Mid Penn entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Riverview Financial Corporation (“Riverview”) pursuant to which Riverview will merge with and into Mid Penn (the “Merger”), with Mid Penn being the surviving corporation in the Merger. Refer to (i) Note 15, Agreement and Plan of Merger; (ii) Part II, Item 1A “Risk Factors”, and (iii) the Form 8-K filed on June 30, 2021, for more information and considerations regarding the proposed Merger.

Mid Penn has evaluated events and transactions occurring subsequent to the balance sheet date of June 30, 2021, for items that should potentially be recognized or disclosed in these consolidated financial statements. The evaluation was conducted through the issuance date of these consolidated financial statements.