| Document and Entity Information | Dec. 12, 2023 |
| Cover [Abstract] | |
| Entity Registrant Name | ORRSTOWN FINANCIAL SERVICES INC |
| Amendment Flag | true |
| Entity Central Index Key | 0000826154 |
| Document Type | 8-K/A |
| Document Period End Date | Dec. 12, 2023 |
| Entity Incorporation State Country Code | PA |
| Entity File Number | 001-34292 |
| Entity Tax Identification Number | 23-2530374 |
| Entity Address, Address Line One | 77 East King Street |
| Entity Address, Address Line Two | P.O. Box 250 |
| Entity Address, City or Town | Shippensburg |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 17257 |
| City Area Code | (717) |
| Local Phone Number | 532-6114 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, no par value |
| Trading Symbol | ORRF |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Description | Orrstown Financial Services, Inc. is filing this Amendment No. 1 to Form 8-K (this “Amendment”) to amend its Current Report on Form 8-K filed on December 12, 2023 (the “Form 8-K”) with the Securities and Exchange Commission (the “Commission”). The purpose of this Amendment is to re-furnish certain information furnished as Exhibit 99.2 to the Form 8-K, as a formatting error caused some of its text to be missing or illegible. The information furnished herewith as Exhibit 99.2 appears with improved formatting, and includes previously missing information, but is otherwise identical to the information that was previously furnished. Other than the replacement of Exhibit 99.2 of the Form 8-K, all Items of the Form 8-K are unaffected by this Amendment and such Items have not been included herein. This Amendment speaks as of the initial filing date of the Form 8-K, does not reflect events that may have occurred subsequent to the original filing date and does not modify or update in any way disclosures made in the Form 8-K. |
