| Document and Entity Information | Aug. 18, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Document Period End Date | Aug. 18, 2021 |
| Entity Registrant Name | CrossAmerica Partners LP |
| Entity Central Index Key | 0001538849 |
| Entity Emerging Growth Company | false |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35711 |
| Entity Tax Identification Number | 45-4165414 |
| Entity Address, Address Line One | 645 Hamilton Street |
| Entity Address, Address Line Two | Suite 400 |
| Entity Address, City or Town | Allentown |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 18101 |
| City Area Code | 610 |
| Local Phone Number | 625-8000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Units |
| Trading Symbol | CAPL |
| Security Exchange Name | NYSE |
| Amendment Description | This Current Report on Form 8-K/A (“Amendment”) amends and supplements the Current Report on Form 8-K filed by CrossAmerica Partners LP (the “Partnership”) with the Securities and Exchange Commission on August 24, 2021 (the “Original Filing”) in connection with the Partnership’s acquisition of certain assets related to the ownership and operations of 106 company operated sites (90 fee; 16 leased) located in the Mid-Atlantic and Northeast regions of the U.S. (the “Assets”) for an aggregate purchase price of $263.0 million, subject to adjustment in accordance with the terms of the Asset Purchase Agreement. The assets are being sold by 7-Eleven as part of a divestiture process in connection with its previously announced acquisition of the Speedway business from Marathon Petroleum Corporation. Pursuant to the instructions on Item 9.01 of Form 8-K, the Original Filing is amended and supplemented by this Amendment to provide the financial statements and pro forma financial information required by Items 9.01(a) and (b) of Form 8-K. No other amendments to the Original Filing are being made by this Amendment. |
