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Organization and Principles of Consolidation - Additional Information (Details) |  |  |  |  |  |  |  | 12 Months Ended |  |  |
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Aug. 21, 2015 | Jul. 31, 2015 | Jul. 01, 2015 | Apr. 01, 2015 | Oct. 01, 2014 | Aug. 29, 2014 | Sep. 25, 2012 shares | Dec. 31, 2017 state segment | Apr. 06, 2017 stores | Mar. 31, 2016 | Jan. 01, 2016
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Units sold in public offering (in shares) | shares |  |  |  |  |  |  | 10,925,000 |  |  |  |
Percentage of non economic general partner interest and incentive distribution rights |  |  |  |  |  | 100.00% |  |  |  |  |
Number of states in which entity operates |  |  |  |  |  |  |  | 30 |  |  |
Percentage of membership interest acquired | 100.00% |  | 100.00% |  |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  |  |  |  | 2 |  |  |
Number of stores | stores |  |  |  |  |  |  |  |  | 207 |  |
Mid Atlantic Convenience Stores Limited Liability Company [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of membership interest acquired |  |  |  |  | 100.00% |  |  |  |  |  |
Susser [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of membership interest acquired |  | 100.00% |  |  |  |  |  |  |  |  |
Percentage of membership interest acquired |  | 100.00% |  |  |  |  |  |  |  |  |
Sunoco LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of membership interest acquired |  |  |  | 50.10% |  |  |  |  |  | 49.90% |
Percentage of membership interest acquired |  |  |  | 31.58% |  |  |  |  |  |  |
Noncontrolling interest, ownership percentage |  |  |  |  |  |  |  |  |  | 68.42% |
Sunoco Retail LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of membership interest acquired |  |  |  |  |  |  |  |  |  | 100.00% | 100.00%
Retail Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of states in which entity operates |  |  |  |  |  |  |  | 20 |  |  |
Wholesale Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of states in which entity operates |  |  |  |  |  |  |  | 30 |  |  |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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