Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2012
Accounting Policies [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents include cash on hand, demand deposits, and short-term investments with original maturities of three months or less, but excluding debt or equity securities classified as marketable securities.
Marketable Securities	Marketable Securities Debt or equity securities should be classified into the following reporting categories: held-to-maturity, trading or available-for-sale securities. The Partnership's investments in debt securities, which typically mature in one year or less, are currently classified as held-to-maturity and valued at amortized cost, which approximates fair value. The fair value of marketable securities is measured using Level 1 inputs. (See Note 8 for more information concerning fair value measurements) The maturity dates range from October 1, 2012 to March 22, 2013 and are classified on the Partnership's balance sheet in current assets. Included in the marketable securities classification on the Consolidated Balance Sheets are approximately $12 million in money market funds. The carrying value of these approximates fair value and are measured using Level 1 inputs.
Accounts Receivable	Accounts Receivable The majority of the trade receivables are from wholesale fuel customers. Credit is extended based on evaluation of the customer's financial condition. Receivables are recorded at face value, without interest or discount. The Partnership provides an allowance for doubtful accounts based on historical experience and on a specific identification basis. Credit losses are recorded when accounts are deemed uncollectible. Receivables from affiliates have risen from transactions with non-consolidated affiliates and include the sale of fuel and settling of credit cards to SUSS and other miscellaneous transactions with SUSS. Predecessor receivables from affiliates also included the concentration of excess cash to SUSS. These receivables are recorded at face value, without interest or discount.
Goodwill	Goodwill Goodwill represents the excess of cost over fair value of assets of businesses acquired. Goodwill and intangible assets acquired in a purchase business combination are recorded at fair value as of the date acquired. Acquired intangibles determined to have an indefinite useful life are not amortized, but are instead tested for impairment at least annually in accordance with the provisions of Accounting Standards Codification 350 “Intangibles - Goodwill and Other” (ASC 350), and are tested for impairment more frequently if events and circumstances indicate that the asset might be impaired. The annual impairment test of goodwill is performed as of the first day of the fourth quarter of the fiscal year. The Financial Accounting Standards Board issued Accounting Standards Update 2011-08 (ASU 2011-08), which provides that qualitative factors are first assessed to determine whether it is necessary to perform the two-step goodwill impairment test. The Partnership used these qualitative factors to determine whether it is more likely than not (likelihood of more than 50%) that the fair value of a reporting unit is less than its carrying amount, including goodwill. During the IPO, an independent valuation of the assets to be contributed to the Partnership was obtained which indicated the value of the goodwill was in excess of the carrying value. Based on this and other qualitative factors, the Partnership determined that it is more likely than not that the goodwill had a fair value which exceeded the carrying value. Some of the qualitative factors considered in applying this test include the consideration of macroeconomic conditions, industry and market considerations, cost factors affecting the business, the overall financial performance of the business and the performance of the unit price of the Partnership. If qualitative factors were not deemed sufficient to conclude that the fair value of goodwill more likely than not exceeded the carrying value of goodwill, then the two-step approach would be applied in making an evaluation. In step one, multiple valuation methodologies, including a market approach (market price multiples of comparable companies) and an income approach (discounted cash flow analysis) would be used. The computations require management to make significant estimates and assumptions. Critical estimates and assumptions that are used as part of these evaluations would include, among other things, selection of comparable publicly traded companies, the discount rate applied to future earnings reflecting a weighted average cost of capital rate, and earnings growth assumptions. A discounted cash flow analysis requires management to make various judgmental assumptions about sales, operating margins, capital expenditures, working capital and growth rates. If after assessing the totality of events or circumstances an entity determines that it is more likely than not that the fair value of a reporting unit is greater than its carrying amount then performing the two-step test is unnecessary. If the estimated fair value of a reporting unit is less than the carrying value, a second step is performed to compute the amount of the impairment by determining an “implied fair value” of goodwill. The determination of the Partnership's “implied fair value” requires the Partnership to allocate the estimated fair value of the reporting unit to the assets and liabilities of the reporting unit. Any unallocated fair value represents the “implied fair value” of goodwill, which is compared to the corresponding carrying value.
Earnings Per Unit	Earnings Per Unit In addition to the common and subordinated units, we have identified the incentive distribution rights ("IDRs") as participating securities and compute income per unit using the two-class method under which any excess of distributions declared over net income shall be allocated to the partners based on their respective sharing of income specified in the partnership agreement. Net income per unit applicable to limited partners (including common and subordinated unitholders) is computed by dividing limited partners' interest in net income, after deducting any incentive distributions, by the weighted-average number of outstanding common and subordinated units. Prior to September 25, 2012, we were wholly owned by SUSS and, accordingly, we did not calculate or report earnings per unit.
Comprehensive Income	Comprehensive Income We account for comprehensive income in accordance with ASC 220, "Comprehensive Income," which established standards for the reporting and presentation of comprehensive income in the consolidated financial statements. We had no transactions which affect comprehensive income and, accordingly, comprehensive income equals net income for all periods presented.
Stock-based Compensation	Stock-based Compensation Certain employees supporting our Predecessor's operations were historically granted long-term incentive compensation awards under the SUSS stock-based compensation programs, which primarily consist of stock options and restricted common stock. Our Predecessor was allocated expenses for stock-based compensation costs, which are included in general and administrative expenses. The allocated expense was $0.2 million and $0.2 million for the three months ended September 30, 2011 and September 30, 2012, respectively and $0.6 million and $0.8 million for the nine months ended September 30, 2011 and September 30, 2012, respectively. In connection with our IPO, our general partner adopted the Susser Petroleum Partners LP 2012 Long-Term Incentive Plan (“2012 LTIP"), under which various types of awards may be granted to employees, consultants and directors of our general partner who provide services for us. We amortize the grant-date fair value of these awards over the vesting period using the straight-line method. Expenses related to unit-based compensation are included in general and administrative expenses.
Income Tax	Income Tax We are subject to the Texas franchise tax that is based on our Texas sourced taxable margin. We are organized as a pass-through for federal income tax purposes. As a result, our partners are responsible for federal income taxes based on their respective share of taxable income. Net income for financial statement purposes may differ significantly from taxable income reportable to unitholders as a result of differences between the tax bases and financial reporting bases of assets and liabilities and the taxable income allocation requirements under the partnership agreement. Pursuant to ASC 740 “Income Taxes” (ASC 740), the Predecessor recognized deferred income tax liabilities and assets for the expected future income tax consequences of temporary differences between financial statement carrying amounts and the related income tax basis. ASC 740 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The Predecessor recognized the impact of a tax position in the financial statements, if that position is not more likely than not of being sustained, based on the technical merits of the position. ASC 740 also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods and disclosure.
New Accounting Pronouncements	New Accounting Pronouncements FASB ASU No. 2011-04. In May 2011, the FASB issued ASU No. 2011-04, "Fair Value Measurement, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS (ASC 820—Fair Value Measurement)." This guidance amends ASC 820 on fair value measurements and disclosures to (1) clarify the board's intent in respect of existing measurement guidance, (2) revise certain measurement guidance that changes or modifies a principle for measuring fair value, and (3) add disclosure requirements concerning the measurement uncertainty of Level 3 measurements. The ASU is effective for interim and annual periods beginning after December 15, 2011. The adoption of this amended guidance did not have a material effect on our consolidated financial position, results of operations, cash flows or related disclosures. FASB ASU No. 2011-05. In June 2011, the FASB issued ASU No. 2011-05, "Comprehensive Income: Presentation of Comprehensive Income (ASC 220—Comprehensive Income)." This guidance removes the presentation options in ASC 220 and requires entities to report components of comprehensive income in either (1) a continuous statement of comprehensive income or (2) two separate but consecutive statements. The ASU does not change the items that must be reported in other comprehensive income. It is effective for fiscal years beginning after December 15, 2011 (and for interim periods within such years). In December 2011, the FASB issued ASU No. 2011-12, which deferred certain aspects of ASU No. 2011-05. Our Predecessor adopted this accounting standard in the first quarter of Fiscal 2012. This standard affects presentation and disclosure, and therefore will not affect our consolidated financial position, results of operations or cash flows. FASB ASU No. 2011-08. In September 2011, the FASB issued ASU No. 2011-08, "Intangibles—Goodwill and Other (ASC 350-20—Goodwill): Testing Goodwill for Impairment." This guidance permits an entity to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform the two-step goodwill impairment test. The ASU is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Our Predecessor adopted ASU No. 2011-08 during the fourth quarter of fiscal 2011 and used it to perform the annual goodwill impairment test. This amendment affects testing steps only, and therefore adoption did not affect our consolidated financial position, results of operations or cash flows. FASB ASU No. 2012-02. In July 2012, the FASB issued ASU No. 2012-02, "Intangibles—Goodwill and Other." This guidance permits an entity to first assess qualitative factors to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired as a basis for determining whether it is necessary to perform the quantitative impairment test in accordance with Subtopic 350. The ASU is effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012. The adoption of this guidance will affect our impairment steps only but will not have an affect on our results of operations, cash flows or related disclosures.