MERGERS AND ACQUISITIONS	9 Months Ended
Sep. 30, 2018
Business Combinations [Abstract]
MERGERS AND ACQUISITIONS	MERGERS AND ACQUISITIONS Mercersburg Financial Corporation On October 1, 2018, the Company completed its acquisition of Mercersburg Financial Corporation ("Mercersburg"), the holding company for First Community Bank of Mercersburg. The transaction was valued at approximately $30,000,000 with the Company issuing 1,052,635 shares of common stock and paying cash totaling approximately $4,900,000. At September 30, 2018, First Community Bank of Mercersburg reported total assets of $184,161,000, total loans of $147,386,000 and total deposits of $160,947,000 on a Call Report filed with federal banking regulators on October 30, 2018. The acquisition expanded the Company's operations in Franklin County, Pennsylvania. The initial purchase accounting for this acquisition is not yet completed and the Company is not yet able to disclose the preliminary fair value of the Mercersburg assets acquired and liabilities assumed. Hamilton Bancorp, Inc. On October 23, 2018, the Company entered into an Agreement and Plan of Merger (the "Merger Agreement") with Hamilton Bancorp, Inc., a Maryland corporation ("Hamilton") and the holding company for Hamilton Bank, based in Towson, Maryland. At September 30, 2018, Hamilton had $502,187,000 in assets, $374,649,000 in loans, $388,471,000 in deposits and 3,416,414 shares outstanding. The Merger Agreement provides that, subject to the terms and conditions thereof, Hamilton will merge with and into the Company, with the Company as the surviving corporation, and that Hamilton Bank will merge with and into Orrstown Bank, with Orrstown Bank as the surviving bank. The merger is expected to close in the second quarter of 2019, subject to receipt of regulatory approvals, the approval of Hamilton's shareholders, and the satisfaction of other customary closing conditions. The acquisition will introduce the Company's operations into the Greater Baltimore area of Maryland. Pursuant to the Merger Agreement, for each share of Hamilton common stock outstanding as of the effective date, the Company will issue $4.10 in cash, without interest, and 0.54 shares of of the Company's common stock, no par value per share. The cash consideration is subject to reduction based on potential losses, write-downs, or reserves related to certain identified loans.

MERGERS AND ACQUISITIONS

Mercersburg Financial Corporation

On October 1, 2018, the Company completed its acquisition of Mercersburg Financial Corporation ("Mercersburg"), the holding company for First Community Bank of Mercersburg. The transaction was valued at approximately $30,000,000 with the Company issuing 1,052,635 shares of common stock and paying cash totaling approximately $4,900,000. At September 30, 2018, First Community Bank of Mercersburg reported total assets of $184,161,000, total loans of $147,386,000 and total deposits of $160,947,000 on a Call Report filed with federal banking regulators on October 30, 2018. The acquisition expanded the Company's operations in Franklin County, Pennsylvania.

The initial purchase accounting for this acquisition is not yet completed and the Company is not yet able to disclose the preliminary fair value of the Mercersburg assets acquired and liabilities assumed.

Hamilton Bancorp, Inc.

On October 23, 2018, the Company entered into an Agreement and Plan of Merger (the "Merger Agreement") with Hamilton Bancorp, Inc., a Maryland corporation ("Hamilton") and the holding company for Hamilton Bank, based in Towson, Maryland. At September 30, 2018, Hamilton had $502,187,000 in assets, $374,649,000 in loans, $388,471,000 in deposits and 3,416,414 shares outstanding. The Merger Agreement provides that, subject to the terms and conditions thereof, Hamilton will merge with and into the Company, with the Company as the surviving corporation, and that Hamilton Bank will merge with and into Orrstown Bank, with Orrstown Bank as the surviving bank. The merger is expected to close in the second quarter of 2019, subject to receipt of regulatory approvals, the approval of Hamilton's shareholders, and the satisfaction of other customary closing conditions. The acquisition will introduce the Company's operations into the Greater Baltimore area of Maryland.

Pursuant to the Merger Agreement, for each share of Hamilton common stock outstanding as of the effective date, the Company will issue $4.10 in cash, without interest, and 0.54 shares of of the Company's common stock, no par value per share. The cash consideration is subject to reduction based on potential losses, write-downs, or reserves related to certain identified loans.