Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Jan. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to such rules and regulations. Although management believes that the disclosures are adequate to make the information presented not misleading, it is suggested that these interim condensed consolidated financial statements be read in conjunction with the Company’s most recent audited financial statements and notes thereto.
New Accounting Pronouncements	In addition, on November 20, 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2015-17, "Balance Sheet Classification of Deferred Taxes". The ASU simplifies the current guidance, which requires entities to separately present deferred tax assets and liabilities as current and noncurrent in a classified balance sheet. Upon adoption, the Company will net its current deferred tax asset with its noncurrent deferred tax liability and present as noncurrent on the balance sheet. The ASU will be effective for annual periods beginning after December 15, 2016, and interim periods within those years (with early adoption allowed). The Company plans to adopt the standard in the fourth quarter of its fiscal year ended April 30, 2016.
Revenue Recognition	Revenue Recognition The Company recognizes retail sales of fuel, grocery and other merchandise, prepared food and fountain and other revenue at the time of the sale to the customer. Renewable Identification Numbers (RINs) are treated as a reduction in cost of goods sold in the period the Company commits to a price and agrees to sell the RIN. Vendor rebates in the form of rack display allowances are treated as a reduction in cost of goods sold and are recognized pro rata over the period covered by the applicable rebate agreement. Vendor rebates in the form of billbacks are treated as a reduction in cost of goods sold and are recognized at the time the product is sold.

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.