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Significant Accounting Policies (Policies) | 12 Months Ended
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Apr. 30, 2018
Accounting Policies [Abstract] |
Principles of consolidation | Principles of consolidation The consolidated financial statements include the financial statements of Casey’s General Stores, Inc. and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.
Use of estimates | Use of estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Cash equivalents | Cash equivalents We consider all highly liquid investments with a maturity at purchase of three months or less to be cash equivalents. Included in cash equivalents are money market funds and credit card, debit card and electronic benefits transfer transactions that process within three days.
Inventories | Inventories Inventories, which consist of merchandise and fuel, are stated at the lower of cost or market. For fuel, cost is determined through the use of the first-in, first-out (FIFO) method. For merchandise inventories, cost is determined through the use of the last-in, first-out (LIFO) method. The excess of replacement cost over the stated LIFO value was $73,494 and $65,593 at April 30, 2018 and 2017, respectively. There were no material LIFO liquidations during the periods presented. Below is a summary of the inventory values at April 30, 2018 and 2017:
| Fiscal 2018 |  | Fiscal 2017
Fuel | $ | 75,817 |  |  | $ | 60,833 |
Merchandise | 165,851 |  |  | 140,811 |
Total inventory | $ | 241,668 |  |  | $ | 201,644 |
The Company often receives vendor allowances on the basis of quantitative contract terms that vary by product and vendor or directly on the basis of purchases made. Vendor allowances include rebates and other funds received from vendors to promote their products.Vendor rebates in the form of rack display allowances (RDAs) are funds that we receive from various vendors for allocating certain shelf space to carry their specific products or to introduce new products in our stores for a particular period of time. The RDAs are treated as a reduction in cost of goods sold and are recognized ratably over the period covered by the applicable rebate agreement. These funds do not represent reimbursements of specific, incremental, or identifiable costs incurred by us in selling the vendor’s products. Vendor rebates in the form of billbacks are treated as a reduction in cost of goods sold and are recognized at the time the rebate is earned per the contract. Reimbursements of an operating expense (e.g., advertising) are recorded as reductions of the related expense. Renewable Identification Numbers (RINs) are recorded as a reduction in cost of goods sold in the period when the Company commits to a price and agrees to sell all of the RINs earned during a specified period. The Company includes in cost of goods sold the costs incurred to acquire fuel and merchandise, including excise taxes, less vendor allowances and rebates and RINs. The Company does not record an asset on the balance sheet related to RINs that have not been validated and contracted.
Goodwill | Goodwill Goodwill and intangible assets with indefinite lives are tested for impairment at least annually. The Company assesses impairment annually at year-end using a market based approach to establish fair value. All of the goodwill assigned to the individual stores is aggregated into a single reporting unit due to the similar economic characteristics of the stores.
Depreciation and amortization | Depreciation and amortization Depreciation of property and equipment and amortization of capital lease assets are computed principally by the straight-line method over the following estimated useful lives:
Buildings | 25-40 years
Machinery and equipment | 5-30 years
Leasehold interest in property and equipment | Lesser of term of lease or life of asset
Leasehold improvements | Lesser of term of lease or life of asset
The Company monitors stores and will accelerate depreciation if the expected life of the asset is reduced due to the expected remaining operation of the store or the Company’s plans. Construction in process is reported at cost and not subject to depreciation until placed in service.
Store closing and asset impairment | Store closings and asset impairment The Company writes down property and equipment of stores it is closing to estimated net realizable value at the time management commits to a plan to close such stores and begins active marketing of the stores. The Company bases the estimated net realizable value of property and equipment on its experience in utilizing and/or disposing of similar assets and on estimates provided by its own and/or third-party real estate experts. The Company monitors closed and underperforming stores for an indication that the carrying amount of assets may not be recoverable. If the sum of the expected future undiscounted cash flows is less than the carrying amount of the assets, an impairment loss is recognized to the extent carrying value of the assets exceeds their estimated fair value. Fair value is based on management’s estimate of the price that would be received to sell an asset in an orderly transaction between market participants. The estimate is derived from offers, actual sale or disposition of assets subsequent to year-end, and other indications of fair value, which are considered Level 3 inputs (See Note 3). In determining whether an asset is impaired, assets are grouped at the lowest level for which there are identifiable cash flows that are largely independent of the cash flows of other groups of assets, which for the Company is generally on a store-by-store basis.
Income taxes | Income taxes The Company uses the asset and liability method of accounting for income taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company calculates its current and deferred tax provision based on estimates and assumptions that could differ from actual results reflected in income tax returns filed in subsequent years. Adjustments based on filed returns are recorded when identified.
Revenue recognition | Revenue recognition The Company recognizes retail sales of fuel, grocery & other merchandise, prepared food & fountain, and commissions on lottery, prepaid phone cards, and video rentals at the time of the sale to the customer. Sales taxes collected from customers and remitted to the government are recorded on a net basis in the consolidated financial statements.
Net income per common share | Net income per common share Basic earnings per share have been computed by dividing net income by the weighted average shares outstanding during each of the years. Unvested shares under equity awards are treated as common shares within the basic earnings per share calculation when an employee has met certain requirements in the award agreement. For example, if retirement provisions are satisfied which allow an employee to avoid forfeiture of the award upon a normal retirement from the Company. The calculation of diluted earnings per share treats stock options as potential common shares to the extent they are dilutive. The diluted earnings per share calculation does not take into effect any shares that have not met performance or market conditions as of the reporting period.
Asset retirement obligations | Asset retirement obligations The Company recognizes the estimated future cost to remove underground storage tanks over the estimated useful life of the storage tank. The Company records a discounted liability for the fair value of an asset retirement obligation with a corresponding increase to the carrying value of the related long-lived asset at the time an underground storage tank is installed. The Company amortizes the amount added to other assets and recognizes accretion expense in connection with the discounted liability over the remaining life of the tank. The estimates of the anticipated future costs for removal of an underground storage tank are based on our prior experience with removal. Because these estimates are subjective and are currently based on historical costs with adjustments for estimated future changes in the associated costs, we expect the dollar amount of these obligations to change as more information is obtained.
Self-insurance | Self-insurance The Company is primarily self-insured for employee healthcare, workers’ compensation, general liability, and automobile claims. The self-insurance claim liability for workers’ compensation, general liability, and automobile claims is determined actuarially at each year end based on claims filed and an estimate of claims incurred but not yet reported. Actuarial projections of the losses are employed due to the potential of variability in the liability estimates. Some factors affecting the uncertainty of claims include the development time frame, settlement patterns, litigation and adjudication direction, and medical treatment and cost trends. The liability is not discounted.
Environmental remediation liabilities | Environmental remediation liabilities The Company accrues for environmental remediation liabilities when it is probable a liability has been incurred and the amount of loss can be reasonably estimated.
Derivatives instruments | Derivative instruments There were no options or futures contracts as of or during the years ended April 30, 2018, 2017, or 2016. However, we do from time to time, participate in a forward buy of certain commodities, primarily cheese and coffee. These are not accounted for as derivatives under the normal purchase and normal sale exclusions under the applicable guidance.
Stock-based compensation | Stock-based compensation Stock-based compensation is recorded based upon the fair value of the award on the grant date. The cost of the award is recognized ratably in the statement of income over the vesting period of the award, adjusted for certain retirement provisions. Additionally, certain awards include performance and market conditions. The performance-based awards are based on the achievement of a three year average return on invested capital (ROIC). For these awards, stock-based compensation expense is estimated based on the probable outcome of shares to be awarded adjusted as necessary at each reporting period. The market-based awards are achieved based on our relative performance to a pre-determined peer group. The fair value of these awards is determined using a Monte Carlo simulation as of the date of the grant. For market-based awards, the stock-based compensation expense will not be adjusted should the initial target awards vary from actual awards.
Segment reporting | Segment reporting As of April 30, 2018, we operated 2,073 stores in 16 states. Our convenience stores offer a broad selection of merchandise, fuel and other products and services designed to appeal to the convenience needs of our customers. We manage the business on the basis of one operating segment and therefore, have only one reportable segment. Our stores sell similar products and services, use similar processes to sell those products and services, and sell their products and services to similar classes of customers. We make specific disclosures concerning the three broad merchandise categories of fuel, grocery & other merchandise, and prepared food & fountain because it makes it easier for us to discuss trends and operational initiatives within our business and industry. Although we can separate revenues and cost of goods sold within these categories (and further sub-categories), the operating expenses associated with operating a store that sells these products are not separable by these three categories.
Recent accounting pronouncements | Recent accounting pronouncements In May 2014, the FASB issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers. The core principle of the new standard is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard, after deferral for one year, is effective for the Company on May 1, 2018. Early application is not permitted. The two permitted transition methods under the new standard are the full retrospective method, in which case the standard would be applied to each prior reporting period presented and the cumulative effect of applying the standard would be recognized at the earliest period shown, or the modified retrospective method, in which case the cumulative effect of applying the standard would be recognized at the date of initial application. The Company has adopted the new standard using the modified retrospective method beginning May 1, 2018. To address implementation of ASU 2014-09 and evaluate its impact on our consolidated financial statements, the Company developed a project plan to evaluate its revenue streams and related internal controls. Since a majority of revenue is derived from point of sale transactions, the implementation of this standard will not have a material impact on the Company's consolidated financial statements. However, certain areas of the consolidated financial statements that will be impacted include the recognition of estimated breakage upon the sale of the Company’s gift cards, and derecognition of an estimated portion of revenue expected to be redeemed in the future through Casey’s pizza box tops and punch card programs. The effect of the adoption is expected to be immaterial to retained earnings as of May 1, 2018 and to net income for the year ended April 30, 2019. The Company expects the future rollout of its new digital program to be impacted by the standard, however, there will not be a change from our current accounting policies since the Company currently does not have a loyalty program. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. The Company is currently evaluating the impact of ASU 2016-02. In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805) to clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions of assets or businesses. ASU 2017-01 is effective for annual periods beginning after December 15, 2017, including interim periods within those periods. It is effective for the Company beginning May 1, 2018, and the Company is currently evaluating the impact of ASU 2017-01, which would be applied prospectively to future acquisitions.

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