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Basis of Presentation (Policies) | 3 Months Ended
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Jul. 31, 2018 | Jul. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
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. |
New Accounting Pronouncements |  | In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers (Topic 606). We adopted the standard on May 1, 2018 using the modified retrospective approach. The Company adopted two changes that affect the timing of recognition of revenues related to gift card breakage income and the redemption of coupon box tops attached to our pizza boxes. The impact related to gift cards was $879, net of $321 of deferred taxes and was an increase to shareholders' equity with a reduction in deferred income. The impact related to box tops was $5,019 net of $1,816 of deferred taxes and was a reduction in shareholders' equity, with an increase in deferred income.
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. The Company adopted ASU 2014-09 in the quarter ended July 31, 2018. As a result, revenue from sales of pizza that include a redeemable box top coupon are deferred until redemption for the portion of the sale that represents the estimated future redemption of the box top coupon. Gift card revenue is now recognized based on the estimated gift card breakage rate over the pro-rata usage of the card. 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 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. Warehousing costs are recorded within operating expenses on the income statement. Sales taxes collected from customers and remitted to the government are recorded on a net basis in the consolidated financial statements. |

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- Definition Disclosure of accounting policy for revenue from contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18823-107790 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 + Details
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