Casey's General Stores (CASY) 10-K25 Jun 212021 FY Annual reportFinancial data

Company Profile

Cover Page

Cover Page - USD ($) $ in Billions	12 Months Ended
Cover Page - USD ($) $ in Billions	Apr. 30, 2021	Jun. 09, 2021	Oct. 31, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Apr. 30, 2021
Current Fiscal Year End Date	--04-30
Document Transition Report	false
Entity File Number	001-34700
Entity Registrant Name	CASEY’S GENERAL STORES, INC.
Entity Incorporation, State or Country Code	IA
Entity Tax Identification Number	42-0935283
Entity Address, Address Line One	ONE SE CONVENIENCE BLVD
Entity Address, City or Town	Ankeny
Entity Address, State or Province	IA
Entity Address, Postal Zip Code	50021
City Area Code	515
Local Phone Number	965-6100
Title of 12(b) Security	Common Stock, no par value per share
Trading Symbol	CASY
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 6.2
Entity Common Stock, Shares Outstanding		37,023,738
Entity Central Index Key	0000726958
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY

Subsequent Events

Subsequent Events	12 Months Ended
Subsequent Events	Apr. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On May 13, 2021, the Company closed on the acquisition of Buchanan Energy, owner of Bucky’s Convenience Stores, an equity purchase with an aggregate purchase price of approximately $580 million, subject to customary post-closing adjustments. The transaction includes 92 retail locations, a dealer network of 81 stores where Casey’s will manage fuel supply agreements to these stores, as well as several parcels of real estate which may be used for new store construction. The acquisition, which includes 24 stores in Nebraska, 56 stores in Illinois, 5 stores in Iowa, 3 stores in Missouri and 4 stores in Texas, brings the Company’s total owned and operated stores to over 2,300. The Buchanan Energy acquisition was financed with a $300 million unsecured term loan under the Credit Facility and cash on hand. The outstanding principal balance of the term loan is required to be repaid in equal quarterly installments in an amount equal to 1.25% of the original principal amount, on the last day of each March, June, September and December following its funding date, with the remaining unpaid principal balance due on January 26, 2026. For further information on the term loan, see Note 3 to the consolidated financial statements, above. During June 2021, the Company closed on the acquisition of 48 stores located in Oklahoma from Circle K for an aggregate purchase price of $36.1 million, subject to customary post-closing adjustments. The transaction was financed with a draw on the revolving credit line under the Credit Facility.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Current assets
Cash and cash equivalents	$ 336,545	$ 78,275
Receivables	79,698	48,500
Inventories	286,598	236,007
Prepaid expenses	11,214	9,801
Income taxes receivable	9,578	14,667
Total current assets	723,633	387,250
Property and equipment, at cost
Land	938,199	872,151
Buildings and leasehold improvements	2,162,261	1,969,585
Machinery and equipment	2,478,404	2,369,361
Finance lease right-of-use assets	22,413	24,780
Construction in process	98,587	125,632
Property and equipment, at cost	5,699,864	5,361,509
Less accumulated depreciation and amortization	2,206,405	2,037,708
Net property and equipment	3,493,459	3,323,801
Other assets, net of amortization	82,147	71,766
Goodwill	161,075	161,075
Total assets	4,460,314	3,943,892
Current liabilities
Lines of credit	0	120,000
Current maturities of long-term debt and finance lease obligations	2,354	570,280
Accounts payable	355,471	184,800
Accrued expenses
Wages and related taxes	69,226	34,039
Property taxes	39,399	36,348
Insurance accruals	24,287	22,097
Other	122,012	95,864
Total current liabilities	612,749	1,063,428
Long-term debt and finance lease obligations, net of current maturities	1,361,395	714,502
Deferred income taxes	439,721	435,598
Deferred compensation	15,094	13,604
Insurance accruals, net of current portion	26,239	22,862
Other long-term liabilities	72,437	50,693
Total liabilities	2,527,635	2,300,687
Commitments and contingencies
Shareholders’ equity
Preferred stock, no par value, none issued	0	0
Common stock, no par value, 36,949,878 and 36,806,325 shares issued and outstanding at April 30, 2021 and 2020, respectively	58,951	33,286
Retained earnings	1,873,728	1,609,919
Total shareholders’ equity	1,932,679	1,643,205
Total liabilities and shareholders’ equity	$ 4,460,314	$ 3,943,892
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilities

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Apr. 30, 2021	Apr. 30, 2020
Statement of Financial Position [Abstract]
Preferred stock, no par value (in usd per share)	$ 0	$ 0
Preferred stock, shares issued (in shares)	0	0
Common stock, no par value (in usd per share)	$ 0	$ 0
Common stock, shares issued (in shares)	36,949,878	36,806,325
Common stock, shares outstanding (in shares)	36,949,878	36,806,325

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands		12 Months Ended
Consolidated Statements of Income - USD ($) $ in Thousands		Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Income Statement [Abstract]
Total revenue		$ 8,707,189	$ 9,175,296	$ 9,352,910
Cost of goods sold (exclusive of depreciation and amortization, shown separately below) (a)	[1]	6,350,754	7,030,612	7,398,186
Operating expenses		1,637,191	1,498,043	1,391,279
Depreciation and amortization		265,195	251,174	244,387
Interest, net		46,679	53,419	55,656
Income before income taxes		407,370	342,048	263,402
Federal and state income taxes		94,470	78,202	59,516
Net income		$ 312,900	$ 263,846	$ 203,886
Net income per common share
Basic (in Dollars per share)		$ 8.44	$ 7.14	$ 5.55
Diluted (in Dollars per share)		8.38	7.10	5.51
Dividends declared per share (in Dollars per share)		$ 1.32	$ 1.28	$ 1.16
Excise taxes collected	[1]	$ 1,053,000	$ 1,063,000	$ 988,000

[1]	Includes excise taxes of approximately $1,053,000, $1,063,000 and $988,000

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Retained Earnings	Retained EarningsCumulative Effect, Period of Adoption, Adjustment
Beginning Balance (shares) at Apr. 30, 2018			36,874,322
Beginning Balance at Apr. 30, 2018	$ 1,271,141	$ (4,140)	$ 0	$ 1,271,141	$ (4,140)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	203,886			203,886
Dividends declared	(42,471)			(42,471)
Exercise of stock options (shares)			71,546
Exercise of stock options	2,290		$ 2,290
Repurchase of common stock (shares)			(352,592)
Repurchase of common stock	(35,247)		$ 0	(35,247)
Stock-based compensation (shares)			71,245
Stock-based compensation	13,310		$ 13,310
Ending Balance (shares) at Apr. 30, 2019			36,664,521
Ending Balance at Apr. 30, 2019	1,408,769		$ 15,600	1,393,169
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	263,846			263,846
Dividends declared	(47,096)			(47,096)
Exercise of stock options (shares)			66,638
Exercise of stock options	2,958		$ 2,958
Stock-based compensation (shares)			75,166
Stock-based compensation	$ 14,728		$ 14,728
Ending Balance (shares) at Apr. 30, 2020	36,806,325		36,806,325
Ending Balance at Apr. 30, 2020	$ 1,643,205		$ 33,286	1,609,919
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	312,900
Dividends declared	(49,091)			(49,091)
Exercise of stock options (shares)			40,189
Exercise of stock options	1,784		$ 1,784
Stock-based compensation (shares)			103,364
Stock-based compensation	$ 23,881		$ 23,881
Ending Balance (shares) at Apr. 30, 2021	36,949,878		36,949,878
Ending Balance at Apr. 30, 2021	$ 1,932,679		$ 58,951	$ 1,873,728

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parentheticals) - $ / shares	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Retained Earnings
Payment of dividends per share (in Dollars per share)	$ 1.32	$ 1.28	$ 1.16

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Cash flows from operating activities
Net income	$ 312,900	$ 263,846	$ 203,886
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	265,195	251,174	244,387
Amortization of debt issuance costs	1,603	0	0
Stock-based compensation	31,986	18,129	16,410
Loss on disposal of assets and impairment charges	9,680	3,495	1,384
Deferred income taxes	4,123	49,810	45,337
Changes in assets and liabilities:
Receivables	(26,278)	(10,644)	7,189
Inventories	(50,342)	37,713	(29,648)
Prepaid expenses	(1,413)	(2,308)	(1,727)
Accounts payable	166,546	(140,151)	12,451
Accrued expenses	65,497	26,400	30,927
Income taxes	5,714	15,783	22,545
Other, net	18,877	(8,933)	(22,527)
Net cash provided by operating activities	804,088	504,314	530,614
Cash flows from investing activities
Purchase of property and equipment	(441,252)	(438,977)	(394,699)
Payments for acquisitions of businesses, net of cash acquired	(9,356)	(32,706)	(68,200)
Proceeds from sales of property and equipment	6,268	5,041	5,069
Net cash used in investing activities	(444,340)	(466,642)	(457,830)
Cash flows from financing activities
Proceeds from long-term debt	650,000	0	0
Repayments of long-term debt	(571,661)	(17,476)	(16,000)
Net (payments) borrowings of short-term debt	(120,000)	45,000	35,400
Payment of debt issuance costs	(5,525)	0	0
Proceeds from exercise of stock options	1,784	2,958	2,290
Payments of cash dividends	(47,971)	(45,951)	(41,430)
Repurchase of common stock	0	0	(37,479)
Tax withholdings on employee stock-based awards	(8,105)	(7,224)	(5,948)
Net cash used in financing activities	(101,478)	(22,693)	(63,167)
Net increase in cash and cash equivalents	258,270	14,979	9,617
Cash and cash equivalents at beginning of year	78,275	63,296	53,679
Cash and cash equivalents at end of year	336,545	78,275	63,296
SUPPLEMENTAL DISCLOSURES OF CASH FLOWS INFORMATION
Cash paid during the year for interest, net of amount capitalized	48,508	54,277	56,306
Cash paid (received) for income taxes, net	80,916	9,364	(11,433)
Noncash investing and financing activities
Noncash additions from adoption of ASC 842	0	22,635	0
Purchased property and equipment in accounts payable	$ 9,204	$ 5,328	$ 15,616

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
Significant Accounting Policies	Apr. 30, 2021
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES Operations: Casey’s General Stores, Inc. and its subsidiaries (the Company/Casey’s) operate 2,243 convenience stores in 16 Midwest states. The stores are located primarily in smaller communities, many with populations of less than 5,000. Retail revenue in 2021 by category are as follows: 55% fuel, 31% grocery and other merchandise, 13% prepared food and fountain, and 1% other. 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: The preparation of financial statements in conformity with U.S. generally accepted accounting principles ("U.S. GAAP") 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: 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. Receivables : Receivables is primarily comprised of balances outstanding from credit card companies which are not processed within three days and balances outstanding from vendor rebates. The Company records credit card receivables at the time of the related sale to the guest. Vendor rebates are recorded based upon the applicable agreements. Uncollectible accounts were immaterial during the periods presented. 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 $93,158 and $87,546 at April 30, 2021 and 2020, respectively. There were no material LIFO liquidations during the periods presented. Below is a summary of the inventory values at April 30, 2021 and 2020: Years ended April 30, 2021 2020 Fuel $ 63,018 $ 33,695 Merchandise 223,580 202,312 Total inventory $ 286,598 $ 236,007 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, including billbacks, are treated as a reduction in cost of goods sold and are recognized primarily based on the purchase of product or shipment of product from the warehouse to the store, or sale of product to our guests. These are recognized in the period earned based on the applicable rebate agreement. 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 the RIN. The Company does not record an asset on the balance sheet related to RINs that have not been validated and contracted. 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. Warehousing costs are recorded within operating expenses on the consolidated statements of income. Capitalized software implementation costs: The Company capitalizes expenditures related to the implementation of software as incurred. These costs are expensed on a straight-line basis within operating expenses over the contractual life of the contract with the related software provider. The useful lives utilized for capitalized software implementation costs range from 2-13 years. As of April 30, 2021 and April 30, 2020, the Company had recognized $42,881 and $38,593 of capitalized software implementation costs, respectively. The outstanding balance is recognized in other assets on the consolidated balance sheets. Goodwill: Goodwill and intangible assets with indefinite lives are tested for impairment at least annually. The Company assesses impairment at least 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. As of both April 30, 2021 and 2020, there was $161,075 of goodwill recognized. Management’s analysis of recoverability completed as of the fiscal year-end indicated no evidence of impairment for the years ended April 30, 2021, 2020, and 2019. Depreciation and amortization: Depreciation of property and equipment are computed using the straight-line method over the following estimated useful lives: Buildings 25-40 years Machinery and equipment 5-40 years Finance lease right-of-use assets 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 the related asset is placed in service. 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, as well as 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. The Company incurred impairment charges of $3,846 in fiscal 2021, $1,177 in fiscal 2020, and $1,167 in fiscal 2019. Impairment charges are a component of operating expenses. Excise taxes: Excise taxes approximating $1,053,000, $1,063,000, and $988,000 on retail fuel sales are included in total revenue and cost of goods sold for fiscal 2021, 2020, and 2019, respectively. 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: 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 guest. Sales taxes collected from guests and remitted to the government are recorded on a net basis in the consolidated financial statements. A portion of revenue from sales that include a redeemable digital box top coupon or points under our Casey’s Rewards program is deferred. The deferred portion of the sale represents the value of the estimated future redemption of the digital box top coupon or points. The amounts related to redeemable digital box top coupons and points are deferred until their redemption or expiration. Revenue related to the digital box top coupons and points issued is expected to be recognized less than one year from the original sale to the guest. As of April 30, 2021 and April 30, 2020, the Company recognized a contract liability of $30,719 and $11,180, respectively, related to the outstanding digital box top coupons and Casey's Rewards points, which is included in other accrued expenses on the consolidated balance sheets. Gift card related revenue is recognized as the gift cards are used by the guest. Gift card breakage revenue is recognized based on the estimated gift card breakage rate over the pro rata usage of the card. 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 a Team Member has met certain requirements in the award agreement. For example, if retirement provisions are satisfied which allow a Team Member to avoid forfeiture of the award upon a normal retirement from the Company, it is included in the basic earnings per share calculation . The calculation of diluted earnings per share treats stock options and unvested restricted stock units with time-based restrictions 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: 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 a long-lived asset at the time an underground storage tank is installed. The Company amortizes the amount added to property and equipment on a straight-line basis 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. The discounted liability was $24,411 and $22,658 at April 30, 2021 and 2020, respectively, and is recorded in other long-term liabilities. Self-insurance: The Company is primarily self-insured for Team Member 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 the claim liability include the loss development factors, which includes the development time frame and settlement patterns, and expected loss rates, which includes litigation and adjudication direction, and medical treatment and cost trends. The liability is not discounted. The balance of our self-insurance reserves was $50,526 and $44,959 for the years ended April 30, 2021 and 2020, respectively. See additional discussion in Note 10. 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. Derivative instruments: There were no options or futures contracts as of or during the years ended April 30, 2021, 2020, or 2019. From time to time, we participate in a forward buy of certain commodities - see further discussion in Note 9. These are not accounted for as derivatives under the normal purchase and sale exclusions within the applicable accounting guidance. 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 consolidated statements of income over the vesting period of the award, adjusted for certain retirement provisions. Additionally, certain awards include performance and market conditions. The majority of performance-based awards are based on either the achievement of a three-year average return on invested capital (ROIC) or a three-year cumulative earnings before interest, income taxes, depreciation, and amortization. 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. Additionally, if the Company's relative total shareholder return over the performance period is in the bottom or top quartile of the applicable peer group, the performance-based shares included will be adjusted downward by 25%, or upward by 25%, respectively (the "TSR Modifier"). 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 target awards vary from actual awards. Segment reporting: As of April 30, 2021, we operated 2,243 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 guests. 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 guests. We make specific disclosures concerning the three broad merchandise categories of fuel, grocery and other merchandise, and prepared food and 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: In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). As a result of this update, we recognized a right-of-use asset representing its right to use the underlying asset for the lease term and a lease liability for the obligation to make lease payments. Both the right-of-use asset and lease liability are measured at the present value of the lease payments, with subsequent measurement dependent on the classification of the lease as either a finance or an operating lease. In July 2018, the FASB issued ASU 2018-10, Leases (Topic 842) - Codification Improvements which contains several FASB Codification improvements for ASC Topic 842 , including several implementation issues and ASU 2018-11, "Leases (Topic 842) - Targeted Improvements" which provides entities with an additional transition method for implementing ASC Topic 842 . This update provided the option to apply the new standard at the adoption date, recognizing a cumulative-effect adjustment to the opening balance of retained earnings along with the modified retrospective approach previously identified, both of which include a number of practical expedients that companies may elect to apply. Under the cumulative-effect adjustment approach, comparative periods would not be restated. Under the modified retrospective approach, leases are recognized and measured under the noted guidance at the beginning of the earliest period presented. We adopted this guidance in the first quarter of fiscal 2020, using the modified retrospective approach and elected the cumulative-effect adjustment practical expedient. As a result of the transition method selected, the Company did not restate previously reported comparable periods. Please refer to Note 7 for additional information regarding ASC Topic 842 . In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This standard provides guidance on accounting for costs of implementation activities performed in a cloud computing arrangement that is a service contract. The amendments in the update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. The Company early adopted this guidance retrospectively, in the first quarter of fiscal 2019. The adoption did not have a material impact on our consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes . The standard includes changes that eliminate certain exceptions related to the approach for intraperiod tax allocation and the methodology for calculating income taxes in an interim period. It also simplifies aspects of the accounting for franchise taxes, certain transactions that result in a step-up in the tax basis of goodwill, and enacted changes in tax laws or rates. The Company is required to adopt this guidance in the first quarter of its fiscal 2022, with early adoption permitted. The Company does not expect the adoption of this standard to have a material impact on our consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The standard included optional guidance for a limited period of time to help ease the burden in accounting for the effects of reference rate reform. The new standard is effective for all entities through December 31, 2022. The Company does not expect this standard to have a material impact on our consolidated financial statements.

Acquisitions

Acquisitions	12 Months Ended
Acquisitions	Apr. 30, 2021
Business Combinations [Abstract]
Acquisitions	ACQUISITIONSDuring the year ended April 30, 2021, the Company acquired 5 stores. Of the 5 stores acquired, 2 were re-opened as a Casey's store during the 2021 fiscal year, and the remaining 3 will be opened during the 2022 fiscal year. The majority of these acquisitions meet the criteria to be considered business combinations. The purchase price of the stores were valued using a discounted cash flow model on a location by location basis. The acquisitions were recorded in the financial statements by allocating the purchase price to the assets acquired, including intangible assets and liabilities assumed, based on their estimated fair values at the acquisition date as determined by third party appraisals or internal estimates. Fair values were determined using Level 3 inputs (see Note 3). The excess of the cost of the acquisition over the net amounts assigned to the fair value of the assets acquired and the liabilities assumed is recorded as goodwill if the acquisition is considered to be a business combination. No goodwill was recognized as the result of the current year acquisitions. Allocation of the purchase price for the transactions in aggregate for the year ended April 30, 2021 is as follows (in thousands): Assets acquired: Inventories $ 249 Property and equipment 9,117 Total assets 9,366 Liabilities assumed: Accrued expenses 10 Total liabilities 10 Net tangible assets acquired 9,356 Goodwill — Total consideration paid $ 9,356

Fair Value of Financial Instrum

Fair Value of Financial Instruments and Long Term Debt	12 Months Ended
Fair Value of Financial Instruments and Long Term Debt	Apr. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments and Long-Term Debt	FAIR VALUE OF FINANCIAL INSTRUMENTS AND LONG-TERM DEBT U.S. GAAP requires that each financial asset and liability carried at fair value be classified into one of the following of the fair value hierarchy levels, which is based upon the quality of the inputs used in the valuation. Level 1 inputs are quoted market prices in active markets for identical assets and liabilities. Level 2 inputs are observable market based inputs or unobservable inputs that are corroborated by market data (excluding those included within Level 1). Level 3 inputs are unobservable inputs that are not corroborated by market data. The Company has not changed its valuation techniques in measuring the fair value of any financial assets and liabilities during the period. A summary of the fair value of the Company’s financial instruments follows. Cash and cash equivalents, receivables, and accounts payable: The carrying amount approximates fair value due to the short maturity of these instruments or the recent purchase of the instruments at current rates of interest. Long-term debt and finance lease obligations: The fair value of the Company’s long-term debt and finance lease obligations (including current maturities) is estimated based on the current rates offered to the Company for debt of the same or similar issues. The fair value of the Company’s long-term debt and capital lease obligations was approximately $1,408,000 and $1,341,000, respectively, at April 30, 2021 and 2020. The carrying amount of the Company’s long-term debt and finance lease obligations by issuance is as follows: As of April 30, 2021 2020 Finance lease liabilities (Note 7) $ 14,085 $ 16,746 5.22% Senior notes due August 9, 2020 $ — 569,000 3.67% Senior notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028 150,000 150,000 3.75% Senior notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028 50,000 50,000 3.65% Senior notes (Series C) due in 7 installments beginning May 2, 2025 and ending May 2, 2031 50,000 50,000 3.72% Senior notes (Series D) due in 7 installments beginning October 28, 2025 and ending October 28, 2031 50,000 50,000 3.51% Senior notes (Series E) due June 13, 2025 150,000 150,000 3.77% Senior notes (Series F) due August 22, 2028 250,000 250,000 2.85% Senior notes (Series G) due August 7, 2030 325,000 — 2.96% Senior notes (Series H) due August 6, 2032 325,000 — Debt issuance costs (336) — 1,363,749 1,285,746 Less current maturities (1) 2,354 571,244 $ 1,361,395 $ 714,502 (1) Current maturities is presented gross in the table above, but net of unamortized debt issuance costs of $964 on the consolidated balance sheets for the year ended April 30, 2020. Interest expense is net of interest income of $168, $860, and $595 for the years ended April 30, 2021, 2020, and 2019, respectively. Interest expense is also net of interest capitalized of $4,537, $5,258, and $3,057 during the years ended April 30, 2021, 2020, and 2019, respectively. The agreements relating to the above long-term debt contain certain operating and financial covenants. At April 30, 2021, the Company was in compliance with all such operating and financial covenants. Listed below are the aggregate maturities of long-term debt, including finance lease obligations, for the 5 years commencing May 1, 2021 and thereafter: Years ended April 30, Finance Leases Senior Notes Total 2022 $ 2,354 $ — $ 2,354 2023 2,484 20,000 22,484 2024 2,060 32,000 34,060 2025 734 32,000 32,734 2026 471 192,000 192,471 Thereafter 5,982 1,074,000 1,079,982 $ 14,085 $ 1,350,000 $ 1,364,085 Senior Notes On June 30, 2020, the Company entered into a note purchase agreement with respect to the issuance of $650,000 aggregate principal amount of senior notes, consisting of: (i) $325,000 aggregate principal amount of 2.85% Senior Notes, Series G (the “Series G Notes”); and (ii) $325,000 aggregate principal amount of 2.96% Senior Notes, Series H (the “Series H Notes”) (collectively, the “Notes”). The Notes were issued on August 7, 2020. The Series G Notes bear interest at the rate of 2.85% per annum, payable semi-annually on February 7 and August 7 of each year, and mature on August 7, 2030. The Series H Notes bear interest at the rate of 2.96% per annum, payable semi-annually on February 7 and August 7 of each year, and mature on August 6, 2032. The Company used a portion of the proceeds of the Notes to pay off the $569,000 5.22% senior notes that matured on August 9, 2020. Bridge Loan On November 8, 2020, the Company entered into a commitment letter (“Commitment Letter”) with Goldman Sachs Bank USA (“Goldman”), pursuant to which Goldman committed to lend the Company up to $100 million under a new senior unsecured 364-day bridge loan facility (the “Bridge Loan”). As a result of, and concurrent with the effectiveness of the second amendment of the Credit Agreement discussed below, the commitments under the Commitment Letter were reduced, and are now expired, in accordance with the terms thereof. Credit Agreement As noted above, on December 23, 2020, the Company entered into a second amendment (“the Amendment”) to its existing credit agreement dated January 11, 2019, as amended June 30, 2020 (together with the Amendment, the “Credit Agreement”) to: (a) increase the revolving commitments thereunder to an aggregate principal amount of $450 million (the “Revolving Facility Increase”, and together with the existing revolving commitments the “Revolving Facility”); and (b) provide for a senior unsecured delayed-draw term loan facility in an aggregate principal amount of up to $300 million (the “Term Loan Facility”). Revolving Facility Increase : The Amendment increased the total borrowing capacity under the Revolving Facility by an aggregate principal amount of $150 million, from $300 million to $450 million. The maturity date of the Revolving Facility remains unchanged, at January 11, 2024. Amounts borrowed under the Revolving Facility bear interest at variable rates based upon, at the Company’s option, either: (a) the LIBO Rate adjusted for statutory reserve requirements (but no less than 0.75%) (the “Adjusted LIBO Rate”), plus a margin ranging from 1.05% to 1.85%; or (b) an alternate base rate, which is the higher of (i) the prime rate announced by the Administrative Agent, (ii) the federal funds rate plus 1/2 of 1.00%, and (iii) the one-month LIBO Rate plus 1.00% (as applicable, the “ABR Rate”), plus a margin ranging from 0.05% to 0.85%. The Revolving Facility also carries a facility fee of 0.20% to 0.40% per annum. The applicable margins and facility fee are dependent upon the Company’s Consolidated Leverage Ratio, as calculated quarterly in accordance with the Credit Agreement (the “Consolidated Leverage Ratio”). The Company had $0 and $120,000 outstanding under the line of credit at April 30, 2021 and 2020, respectively. Term Loan Facility : The Amendment also provides for a new senior unsecured delayed-draw term loan facility in an aggregate principal amount of up to $300 million. The Term Loan Facility has a maturity date of January 6, 2026 (the “Term Loan Maturity Date”) and its proceeds may be used to finance the acquisition of Buchanan Energy (see additional discussion at Note 11), as well as working capital needs, capital expenditures, share repurchases and general corporate purposes. Amounts borrowed under the Term Loan Facility will bear interest at variable rates based upon, at the Company’s option, either: (i) the Adjusted LIBO Rate, plus a margin ranging from 1.55% to 2.60%; or (ii) the ABR Rate, plus a margin ranging from 0.20% to 1.60%. The Term Loan Facility also carries a facility fee of 0.20% to 0.40% per annum. The applicable margins and facility fee are dependent upon the Consolidated Leverage Ratio. The outstanding principal balance of the loan drawn on the Term Loan Facility is required to be repaid in equal quarterly installments in an amount equal to 1.25% of the original principal amount, on the last day of each March, June, September and December following its funding date, with the balance due on the Term Loan Maturity Date. The Company had not yet drawn on the Term Loan Facility as of April 30, 2021. Subsequent to fiscal 2021, the Company drew $300 million on the Term Loan Facility to partially fund the Buchanan Energy acquisition - refer to Note 11 for additional details. Bank Line

Preferred and Common Stock

Preferred and Common Stock	12 Months Ended
Preferred and Common Stock	Apr. 30, 2021
Share-based Payment Arrangement [Abstract]
Preferred And Common Stock	PREFERRED AND COMMON STOCK Preferred stock: The Company has 1,000,000 authorized shares of preferred stock, of which 250,000 shares have been designated as Series A Serial Preferred Stock. No shares have been issued. Common stock: The Company currently has 120,000,000 authorized shares of common stock. Stock incentive plans: The 2018 Stock Incentive Plan (the “2018 Plan”) was approved by the Company's shareholders on September 5, 2018 ("the "2018 Plan Effective Date"). The 2018 Plan replaced the 2009 Stock Incentive Plan (the "2009 Plan") under which no new awards are allowed to be granted as of the 2018 Plan Effective Date. Awards under the 2018 Plan may take the form of stock options, stock appreciation rights, restricted stock, restricted stock units and other equity-based and equity-related awards. Each share issued pursuant to a stock option and each share with respect to which a stock-settled stock appreciation right is exercised (regardless of the number of shares actually delivered) is counted as one share against the maximum limit under the 2018 Plan, and each share issued pursuant to an award of restricted stock or restricted stock units is counted as two shares against the maximum limit. Restricted stock is transferred immediately upon grant (and may be subject to a holding period), whereas restricted stock units have a vesting period that must expire, and in some cases performance or market conditions that must be satisfied before the stock is transferred. There were 2,211,232 shares available for grant at April 30, 2021, under the 2018 Plan. We account for stock-based compensation by estimating the grant date fair value of stock options using the Black Scholes model, and the fair value of time-based and performance-based restricted stock unit awards using the closing price of our common stock on the applicable grant date, or the date on which performance goals for performance-based units are established, if after the grant date. For market-based awards, we use a "Monte Carlo" approach to estimate the value of the awards, which simulates the prices of the Company’s and each member of the performance peer groups' common stock price at the end of the relevant performance period, taking into account volatility and the specifics surrounding each total shareholder return metric under the relevant plan. We recognize these amounts as an operating expense in our consolidated statements of income ratably over the requisite service period using the straight-line method, as adjusted for certain retirement provisions, and updated estimates of shares to be issued under performance-based awards. All awards have been granted at no cost to the grantee and/or non-employee member of the Board. The following table summarizes the equity-related grants made during the three-year period ended April 30, 2021 : Date of Grant Type of Grant Shares Granted Recipients Vesting Date Fair Value at Grant Date May 24, 2018 Restricted Stock Units 88,846 Key Employees May 24, 2021 $8,593 June 8, 2018 Restricted Stock Units (1) 75,402 Officers June 8, 2021 $7,571 September 5, 2018 Restricted Stock Units 7,984 Non-Employee Board Members 2019 Annual Shareholders' Meeting Date $920 June 4, 2019 Restricted Stock Units 75,959 Key Employees June 4, 2022 $9,886 June 4, 2019 Restricted Stock Units (1) 59,579 Officers June 4, 2022 $9,097 June 24, 2019 Restricted Stock Units (2) 32,786 CEO Various (2) $5,700 September 4, 2019 Restricted Stock Units 5,504 Non-Employee Board Members 2020 Annual Shareholders' Meeting Date $919 December 23, 2019 Restricted Stock Units (3) 5,000 CEO Various (3) $788 Fiscal 2020 -Various Restricted Stock Units (4) 8,444 Officers Various (4) $1,368 Fiscal 2020 -Various Restricted Stock Units (5) 1,763 Officers Various (5) $354 Fiscal 2021 -Various Restricted Stock Units 80,050 Key Employees Vests ratably on anniversary date over three-year period $13,417 Fiscal 2021 -Various Restricted Stock Units (6) 94,756 Officers Various (6) $17,856 September 2, 2020 Restricted Stock Units 5,240 Non-Employee Board Members 2021 Annual Shareholders' Meeting Date $951 Fiscal 2021 -Various Restricted Stock Units (7) 29,890 Key Employees and Officers Various (7) $5,153 (1) This grant of restricted stock units ("RSUs") includes time-based, performance-based and market-based awards. The performance-based awards represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three y $4.2 million for the 2018 grant and $6.9 million for the 2019 grant (compared to a grant date fair value of $2.8 million and $3.4 million, respectively), will be recognized on a straight-line basis over the vesting period, subject to acceleration for retirement provisions. The market-based awards incorporate market conditions in determining fair value as of the grant date, and will also range from 0% to 200% of "target". Total market-based expense of approximately $2.6 million for the 2018 grant and $3.1 million for the 2019 grant, will be recognized on a straight-line basis over the vesting period, subject to acceleration for retirement provisions. (2) This grant of RSUs includes time-based awards that vest ratably on each June 24, 2020 through 2022, along with a market-based award vesting June 24, 2022. The market-based award incorporates market conditions in determining fair value on the grant date and will range from 0% to 200% of target. Total market-based expense of approximately $1.8 million will be recognized on a straight-line basis over the vesting period. (3) This grant of RSUs includes performance-based awards which are calculated based upon targets achieved over a performance period of January 1, 2020 to December 31, 2020. If the performance targets are met, the units vest ratably on each January 15, 2021 through 2023. (4) These grants of RSUs were issued to various officers throughout the fiscal year. The grants were comprised of time-based awards and vest in accordance with the vesting schedules in the award agreements, ranging from January 2021 to January 2023. (5) These grants of RSUs were issued to various officers throughout the fiscal year. The grants include time-based, performance-based and market-based awards. The performance-based awards represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three (6) These grants of RSUs were issued to officers throughout the year. The grants include time-based awards and performance-based awards. The time-based awards vest ratably over a three-year period commencing on the first anniversary of the grant date. The performance-based awards represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three (7) These grants of RSUs were issued to officers and key employees throughout the year. The grants includes primarily time-based awards, as well as a performance-based award. The time-based awards vest in accordance with the vesting schedules in the award agreements, ranging from June 2021 to June 2023. The grant also includes one performance-based award that represents a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three At April 30, 2021, stock options for 3,000 shares (which expire on June 23, 2021) were outstanding. All stock option shares issued are previously unissued authorized shares. Information concerning the issuance of stock options under the 2009 Plan is presented in the following table (no stock option awards have been granted under the 2018 Plan): Number Weighted Outstanding at April 30, 2018 181,673 $ 39.48 Exercised (71,546) 32.02 Forfeited (300) 25.26 Outstanding at April 30, 2019 109,827 $ 44.39 Exercised (66,638) 44.39 Outstanding at April 30, 2020 43,189 $ 44.39 Exercised (40,189) 44.39 Outstanding at April 30, 2021 3,000 $ 44.39 At April 30, 2021, all outstanding options had an aggregate intrinsic value of $533 and a remaining contractual life of 0.17 years. The weighted average exercise price for all remaining outstanding options is $44.39. All options are vested as of April 30, 2021. The aggregate intrinsic value for the total of all options exercised during the year ended April 30, 2021 was $5,297. Information concerning the issuance of restricted stock units under the 2018 Plan and the 2009 Plan is presented in the following table: Unvested at April 30, 2018 338,981 Granted 172,232 Vested (104,166) Forfeited (10,530) Performance Award Adjustments (7,717) Unvested at April 30, 2019 388,800 Granted 189,035 Vested (108,484) Forfeited (25,146) Performance Award Adjustments 29,594 Unvested at April 30, 2020 473,799 Granted 209,936 Vested (154,842) Forfeited (12,275) Performance Award Adjustments 130,302 Unvested at April 30, 2021 646,920 Total compensation costs recorded for employees and non-employee board members for the stock options, restricted stock, and restricted stock unit awards for the years ended April 30, 2021, 2020 and 2019 were $31,986, $18,129, and $16,410, respectively. As of April 30, 2021, there was $36,717 of total unrecognized compensation costs related to the 2018 Plan and 2009 Plan for costs related to restricted stock units which are expected to be recognized ratably through fiscal 2023. During the fourth quarter of the fiscal year ended April 30, 2017, the Company began a share repurchase program, wherein the Company was authorized to repurchase up to an aggregate of $300 million of the Company's outstanding common stock. The share repurchase authorization was valid for a period of two years. From its inception on March 9, 2017, through May 2018, the company completed the $300 million authorization by repurchasing 2,794,192 shares of its common stock. In March 2018, the Company announced a second share repurchase program with an aggregate $300 million share repurchase program. The share repurchase authorization was valid for a period of two years. On March 6, 2020, the authorization was extended through the end of the Company’s 2022 fiscal year. The timing and number of repurchase transactions under the program depends on a variety of factors including, but not limited to, market conditions, corporate considerations, business opportunities, debt agreements, and regulatory requirements. The program can be suspended or discontinued at any time. No repurchases were made on that program in fiscal 2021.

Net Income Per Common Share

Net Income Per Common Share	12 Months Ended
Net Income Per Common Share	Apr. 30, 2021
Earnings Per Share [Abstract]
Net Income Per Common Share	NET INCOME PER COMMON SHARE Computations for basic and diluted earnings per common share are presented below: Years ended April 30, 2021 2020 2019 Basic Net income $ 312,900 $ 263,846 $ 203,886 Weighted average shares outstanding-basic 37,092,273 36,956,115 36,709,940 Basic earnings per common share $ 8.44 $ 7.14 $ 5.55 Diluted Net income $ 312,900 $ 263,846 $ 203,886 Weighted-average shares outstanding-basic 37,092,273 36,956,115 36,709,940 Plus effect of stock options and restricted stock units 263,865 229,713 265,447 Weighted-average shares outstanding-diluted 37,356,138 37,185,828 36,975,387 Diluted earnings per common share $ 8.38 $ 7.10 $ 5.51 There were no options considered antidilutive; therefore, all options were included in the computation of dilutive earnings per share for fiscal 2021, 2020, and fiscal 2019, respectively.

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Income tax expense attributable to earnings consisted of the following components: Years ended April 30, 2021 2020 2019 Current tax expense: Federal $ 73,950 $ 22,182 10,326 State 16,397 6,210 3,853 90,347 28,392 14,179 Deferred tax expense 4,123 49,810 45,337 Total income tax expense $ 94,470 $ 78,202 59,516 The tax effects of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities were as follows: As of April 30, 2021 2020 Deferred tax assets: Accrued liabilities and reserves $ 29,583 $ 12,423 Workers compensation 9,000 8,303 Operating and finance lease obligations 9,186 10,006 Asset retirement obligations 6,294 5,881 Deferred compensation 4,221 3,781 Equity compensation 9,131 7,083 State net operating losses & tax credits 928 424 Other 3,068 1,745 Total gross deferred tax assets 71,411 49,646 Less valuation allowance — 47 Total net deferred tax assets 71,411 49,599 Deferred tax liabilities: Property and equipment depreciation (484,065) (460,805) Goodwill (27,047) (24,348) Other (20) (44) Total gross deferred tax liabilities (511,132) (485,197) Net deferred tax liability $ (439,721) (435,598) At April 30, 2021, the Company had net operating loss carryforwards for state income tax purposes of approximately $67,399, which are available to offset future state taxable income. The state net operating loss carryforwards begin to expire in 2029. In addition, the Company had state tax credit carryforwards of approximately $984, which begin to expire in 2026. The valuation allowance for state net operating loss deferred tax assets as of April 30, 2021 and 2020 was $0 and $47, respectively. In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected taxable income, and tax planning strategies in making this assessment. Total reported tax expense applicable to the Company’s continuing operations varies from the tax that would have resulted from applying the statutory U.S. federal income tax rates to income before income taxes. Years ended April 30, 2021 2020 2019 Income taxes at the statutory rates 21.0 % 21.0 % 21.0 % Impact of Tax Reform Act — % — % 0.4 % Federal tax credits (1.5) % (1.9) % (2.3) % State income taxes, net of federal tax benefit 3.5 % 4.0 % 4.3 % Impact of phased-in state law changes, net of federal benefit — % (0.2) % (1.8) % ASU 2016-09 benefit (stock-based compensation) (0.6) % (0.5) % (0.6) % Other 0.8 % 0.5 % 1.6 % 23.2 % 22.9 % 22.6 % The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs. The Company had a total of $9,316 and $8,907 in gross unrecognized tax benefits at April 30, 2021 and 2020, respectively, which is recorded in other long-term liabilities in the consolidated balance sheet. Of this amount, $7,360 represents the amount of unrecognized tax benefits that, if recognized, would impact our effective tax rate. Unrecognized tax benefits increased $409 during the twelve months ended April 30, 2021, due primarily to the increase associated with income tax filing positions for the current year exceeding the decrease related to the expiration of certain statute of limitations. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: 2021 2020 Beginning balance $ 8,907 $ 7,287 Additions based on tax positions related to current year 2,356 2,780 Reductions due to lapse of applicable statute of limitations (1,947) (1,160) Ending balance $ 9,316 $ 8,907 The total net amount of accrued interest and penalties for such unrecognized tax benefits was $370 and $354 at April 30, 2021 and 2020, respectively, and is included in other long-term liabilities. Net interest and penalties included in income tax expense for the twelve month periods ended April 30, 2021 and 2020 was an increase in tax expense of $16 and $112, respectively. A number of years may elapse before an uncertain tax position is audited and ultimately settled. It is difficult to predict the ultimate outcome or the timing of resolution for uncertain tax positions. It is reasonably possible that the amount of unrecognized tax benefits could significantly increase or decrease within the next twelve months. These changes could result from the expiration of the statute of limitations, examinations or other unforeseen circumstances. The Company has no ongoing federal or state income tax examinations. At this time, the Company’s best estimate of the reasonably possible change in the amount of the gross unrecognized tax benefits is a decrease of $2,000 during the next twelve months mainly due to the expiration of certain statute of limitations. The federal statute of limitations remains open for the tax years 2015 and forward. Tax years 2012 and forward are subject to audit by state tax authorities depending on open statute of limitations waivers and the tax code of each state.

Leases

Leases	12 Months Ended
Leases	Apr. 30, 2021
Leases [Abstract]
Leases	LEASES The Company is a lessee in situations where we lease property and equipment, most commonly land or building, from a lessor. The Company is a lessor in situations where the Company owns land or building and leases a portion or all of the property or equipment to a tenant. In both situations, leases are reported in accordance with ASC 842 - Leases . As a lessee, the Company recognizes a right-of-use asset representing its right to use the underlying asset for the lease term and a lease liability for the obligation to make lease payments. Both the right-of-use asset and lease liability are initially measured at the present value of the lease payments, with subsequent measurement dependent on the classification of the lease as either a finance or an operating lease. For leases with a term of twelve months or less, we have elected to not recognize lease assets and lease liabilities and will recognize lease expense on a straight-line basis over the lease term. The Company records the operating lease liability in accrued expenses and other long-term liabilities and records the finance lease liability within current maturities of long-term debt and long-term debt and finance lease obligations on the consolidated balance sheets. We have elected to adopt the package of practical expedients, as well as the land easement practical expedient. All lessor related activity is considered immaterial to the consolidated financial statements. The leases initially recorded under ASC 842 were recognized, at the time of adoption, at an amount equal to the present value of the lease payments using the incremental borrowing rate of debt based upon the remaining term of the lease. New leases are recognized at the present value of the lease payments using the implicit rate in the lease agreement when it is readily determinable. In the case the implicit rate is not readily determinable, the Company uses the incremental borrowing rate of debt based on the term of the lease. The Company also has options to renew or extend the current lease arrangement on many of our leases. In these situations, if it was reasonably certain the lease would be extended, we have included those extensions within the remaining lease payments at the time of measurement. Lease right-of-use assets outstanding as of April 30, 2021 and 2020 consisted of the following: Classification April 30, 2021 April 30, 2020 Finance lease right-of-use assets Property and equipment $ 11,711 $ 14,583 Operating lease right-of-use assets Other assets $ 20,145 $ 21,143 Weighted average remaining lease terms, weighted average discount rates, and supplementary cash flow information for outstanding leases were as follows: April 30, 2021 April 30, 2020 Weighted-average remaining lease-term - finance lease 10.9 10.9 Weighted-average remaining lease-term - operating lease 20.4 20.4 Weighted-average discount rate - finance lease 5.38 % 5.34 % Weighted-average discount rate - operating lease 4.42 % 4.25 % Right-of-use assets obtained in exchange for new finance lease liabilities $ — $ 1,520 Right-of-use assets obtained in exchange for new operating lease liabilities $ 1,109 $ 2,840 Future minimum payments under the finance leases and operating leases with initial or remaining terms of one year or more consisted of the following at April 30, 2021: Years ended April 30, Finance leases Operating leases 2022 $ 3,110 $ 1,794 2023 3,116 1,693 2024 2,565 1,658 2025 1,167 1,663 2026 872 1,679 Thereafter 9,893 25,575 Total minimum lease payments 20,723 34,062 Less amount representing interest 6,638 12,997 Present value of net minimum lease payments $ 14,085 $ 21,065 Effective during the third quarter of fiscal year 2020, Casey’s Marketing Company, and the City of Joplin, Missouri (“Joplin”) entered into an agreement in which Joplin agreed to issue up to $51.4 million of taxable industrial development revenue bonds for the purpose of acquiring, constructing, improving, purchasing, equipping and installing a warehouse and distribution facility, which is to be developed and used by the Company. As title transfers to Joplin throughout development and the Company subsequently leases the related asset from Joplin, we have accounted for the transaction under the sale-and-leaseback guidance included in ASC 842-40 . We have a purchase option included in the lease agreement for below the fair value of the asset, which prevents the transfer of the assets to Joplin from being recognized as a sale. Accordingly, we have not recognized any gain or loss related to the transfer. Furthermore, we have not derecognized the transferred assets and continue to recognize them in property and equipment on the consolidated balance sheets. The Company has the right and intends to set-off
Leases	LEASES The Company is a lessee in situations where we lease property and equipment, most commonly land or building, from a lessor. The Company is a lessor in situations where the Company owns land or building and leases a portion or all of the property or equipment to a tenant. In both situations, leases are reported in accordance with ASC 842 - Leases . As a lessee, the Company recognizes a right-of-use asset representing its right to use the underlying asset for the lease term and a lease liability for the obligation to make lease payments. Both the right-of-use asset and lease liability are initially measured at the present value of the lease payments, with subsequent measurement dependent on the classification of the lease as either a finance or an operating lease. For leases with a term of twelve months or less, we have elected to not recognize lease assets and lease liabilities and will recognize lease expense on a straight-line basis over the lease term. The Company records the operating lease liability in accrued expenses and other long-term liabilities and records the finance lease liability within current maturities of long-term debt and long-term debt and finance lease obligations on the consolidated balance sheets. We have elected to adopt the package of practical expedients, as well as the land easement practical expedient. All lessor related activity is considered immaterial to the consolidated financial statements. The leases initially recorded under ASC 842 were recognized, at the time of adoption, at an amount equal to the present value of the lease payments using the incremental borrowing rate of debt based upon the remaining term of the lease. New leases are recognized at the present value of the lease payments using the implicit rate in the lease agreement when it is readily determinable. In the case the implicit rate is not readily determinable, the Company uses the incremental borrowing rate of debt based on the term of the lease. The Company also has options to renew or extend the current lease arrangement on many of our leases. In these situations, if it was reasonably certain the lease would be extended, we have included those extensions within the remaining lease payments at the time of measurement. Lease right-of-use assets outstanding as of April 30, 2021 and 2020 consisted of the following: Classification April 30, 2021 April 30, 2020 Finance lease right-of-use assets Property and equipment $ 11,711 $ 14,583 Operating lease right-of-use assets Other assets $ 20,145 $ 21,143 Weighted average remaining lease terms, weighted average discount rates, and supplementary cash flow information for outstanding leases were as follows: April 30, 2021 April 30, 2020 Weighted-average remaining lease-term - finance lease 10.9 10.9 Weighted-average remaining lease-term - operating lease 20.4 20.4 Weighted-average discount rate - finance lease 5.38 % 5.34 % Weighted-average discount rate - operating lease 4.42 % 4.25 % Right-of-use assets obtained in exchange for new finance lease liabilities $ — $ 1,520 Right-of-use assets obtained in exchange for new operating lease liabilities $ 1,109 $ 2,840 Future minimum payments under the finance leases and operating leases with initial or remaining terms of one year or more consisted of the following at April 30, 2021: Years ended April 30, Finance leases Operating leases 2022 $ 3,110 $ 1,794 2023 3,116 1,693 2024 2,565 1,658 2025 1,167 1,663 2026 872 1,679 Thereafter 9,893 25,575 Total minimum lease payments 20,723 34,062 Less amount representing interest 6,638 12,997 Present value of net minimum lease payments $ 14,085 $ 21,065 Effective during the third quarter of fiscal year 2020, Casey’s Marketing Company, and the City of Joplin, Missouri (“Joplin”) entered into an agreement in which Joplin agreed to issue up to $51.4 million of taxable industrial development revenue bonds for the purpose of acquiring, constructing, improving, purchasing, equipping and installing a warehouse and distribution facility, which is to be developed and used by the Company. As title transfers to Joplin throughout development and the Company subsequently leases the related asset from Joplin, we have accounted for the transaction under the sale-and-leaseback guidance included in ASC 842-40 . We have a purchase option included in the lease agreement for below the fair value of the asset, which prevents the transfer of the assets to Joplin from being recognized as a sale. Accordingly, we have not recognized any gain or loss related to the transfer. Furthermore, we have not derecognized the transferred assets and continue to recognize them in property and equipment on the consolidated balance sheets. The Company has the right and intends to set-off

Benefit Plans

Benefit Plans	12 Months Ended
Benefit Plans	Apr. 30, 2021
Retirement Benefits [Abstract]
Benefit Plans	BENEFIT PLANS 401(k) Plan: The Company provides Team Members with a defined contribution 401(k) Plan. The 401(k) Plan is available to all Team Members who meet minimum age and service requirements. The Company contributions consist of matching amounts in Company stock and are allocated based on Team Member contributions. Contributions to the 401(k) Plan were $10,382, $10,571 , and $9,918 for the years ended April 30, 2021, 2020, and 2019, respectively. On April 30, 2021 and 2020, 909,161 and 1,113,882 shares of common stock, respectively, were held by the trustee of the 401(k) Plan in trust for distribution to eligible participants upon death, disability, retirement, or termination of employment. Shares held by the 401(k) Plan are treated as outstanding in the computation of net income per common share. Supplemental executive retirement plan: The Company has a nonqualified supplemental executive retirement plan (SERP) for two of its former executive officers, one of whom retired April 30, 2003 and the other on April 30, 2008. The SERP provides for the Company to pay annual retirement benefits, up to 50% of base compensation until death of the officer. If death occurs within twenty years of retirement, the benefits become payable to the officer’s spouse (at a reduced level) until the spouse’s death or twenty years from the date of the officer’s retirement, whichever comes first. The Company recorded the deferred compensation over the term of employment. The amounts accrued at April 30, 2021 and 2020, respectively, were $2,866 and $3,434. The discount rates were based off of the Company's incremental borrowing rate, and ranged from 1.36% to 2.52% for the year ended April 30, 2021. The discount rates used for the year ended April 30, 2020 ranged from 2.04% to 2.44%. The Company expects to pay $637 per year for each of the next two years, and $354 in the third through fifth years. The expense incurred in fiscal 2021, 2020, and 2019 related to those agreements was $67, $269, and $221, respectively. Other post-employment benefits: The Company also has severance and/or deferred compensation agreements with former Team Members. The amounts accrued at April 30, 2021 and 2020 were $2,326 and $3,793, respectively. The Company expects to pay $401 in fiscal 2022 and each of the four years thereafter under the agreements. The expense (benefit received) incurred in fiscal 2021, 2020, and 2019 related to these agreements was $44, $2,727, and $(97), respectively.

Commitments

Commitments	12 Months Ended
Commitments	Apr. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments	COMMITMENTS The Company has entered into employment agreements with its Chief Executive Officer, Chief Financial Officer, and Chief Operating Officer, each of which require minimum annual compensation, exclusive of incentive payments. The Company also has entered into change of control agreements with its Chief Executive Officer and 25 other officers, providing for certain payments in the event of termination in connection with a change of control of the Company. We have entered into various purchase agreements related to our fuel supply, which include varying volume commitments. Prices included in the purchase agreements are indexed to market prices. While volume commitments are included in the contracts, we do not have a history of incurring material penalties related to these provisions. These contracts are not accounted for as derivatives as they meet the normal purchases exclusion under derivative accounting. We have entered into forward contracts for cheese in order to fix the price per pound for a portion of our expected supply. As of April 30, 2021, the forward contracts run through May 2021. The monthly commitment under these contracts is approximately $3,900. These contracts are not accounted for as derivatives as they meet the normal purchases exclusion under derivative accounting.

Contingencies

Contingencies	12 Months Ended
Contingencies	Apr. 30, 2021
Loss Contingency [Abstract]
Contingencies	CONTINGENCIES Environmental compliance: The United States Environmental Protection Agency and several states have adopted laws and regulations relating to underground storage tanks used for petroleum products. Several states in which the Company does business have trust fund programs with provisions for sharing or reimbursing corrective action or remediation costs. Management currently believes that substantially all capital expenditures for electronic monitoring, cathodic protection, and overfill/spill protection to comply with existing regulations have been completed. The Company has an accrued liability at April 30, 2021 and 2020 of approximately $368 and $328, respectively, for estimated expenses related to anticipated corrective actions or remediation efforts, including relevant legal and consulting costs. Management believes the Company has no material joint and several environmental liability with other parties. Additional regulations or amendments to the existing regulations could result in future revisions to such estimated expenditures. Legal matters: From time to time we may be involved in legal or administrative proceedings or investigations arising from the conduct of our business operations, including, but not limited to, contractual disputes; employment, personnel, or accessibility matters; personal injury and property damage claims; and claims by federal, state, and local regulatory authorities relating to the sale of products pursuant to licenses and permits issued by those authorities. Claims for damages in those actions may be substantial. While the outcome of such litigation, proceedings, investigations, or claims is never certain, it is our opinion, after taking into consideration legal counsel’s assessment and the availability of insurance proceeds and other collateral sources to cover potential losses, that the ultimate disposition of such matters currently pending or threatened, individually or cumulatively, will not have a material impact on our consolidated financial position and results of operations. Other: At April 30, 2021, the Company was primarily self-insured for workers’ compensation claims in all but two states of its marketing territory. In North Dakota and Ohio, the Company is required to participate in an exclusive, state managed fund for all workers compensation claims. The Company was also partially self-insured for general liability and auto liability under an agreement that provides for annual stop-loss limits equal to or exceeding $1,000 for auto liability and $500 for general liability and workers' compensation. To facilitate this agreement, letters of credit approximating $24,000 and $21,526 were issued and outstanding at April 30, 2021 and 2020, respectively, on the insurance company’s behalf. Additionally, the Company is self-insured for its portion of Team Member medical expenses. At April 30, 2021 and 2020, the Company had $50,526 and $44,959, respectively, outstanding for estimated claims relating to self-insurance, the majority of which has been actuarially determined.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Apr. 30, 2021
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 ("U.S. GAAP") 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 $93,158 and $87,546 at April 30, 2021 and 2020, respectively. There were no material LIFO liquidations during the periods presented. Below is a summary of the inventory values at April 30, 2021 and 2020: Years ended April 30, 2021 2020 Fuel $ 63,018 $ 33,695 Merchandise 223,580 202,312 Total inventory $ 286,598 $ 236,007 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, including billbacks, are treated as a reduction in cost of goods sold and are recognized primarily based on the purchase of product or shipment of product from the warehouse to the store, or sale of product to our guests. These are recognized in the period earned based on the applicable rebate agreement. 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 the RIN. The Company does not record an asset on the balance sheet related to RINs that have not been validated and contracted.
Capitalized software implementation costs and Goodwill	Capitalized software implementation costs: The Company capitalizes expenditures related to the implementation of software as incurred. These costs are expensed on a straight-line basis within operating expenses over the contractual life of the contract with the related software provider. The useful lives utilized for capitalized software implementation costs range from 2-13 years. As of April 30, 2021 and April 30, 2020, the Company had recognized $42,881 and $38,593 of capitalized software implementation costs, respectively. The outstanding balance is recognized in other assets on the consolidated balance sheets.
Depreciation and amortization	Depreciation and amortization: Depreciation of property and equipment are computed using the straight-line method over the following estimated useful lives: Buildings 25-40 years Machinery and equipment 5-40 years Finance lease right-of-use assets 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 the related asset is 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, as well as estimates provided by its own and/or third-party real estate experts.
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 and other merchandise, prepared food and fountain and other revenue at the time of the sale to the guest. Sales taxes collected from guests and remitted to the government are recorded on a net basis in the consolidated financial statements. A portion of revenue from sales that include a redeemable digital box top coupon or points under our Casey’s Rewards program is deferred. The deferred portion of the sale represents the value of the estimated future redemption of the digital box top coupon or points. The amounts related to redeemable digital box top coupons and points are deferred until their redemption or expiration. Revenue related to the digital box top coupons and points issued is expected to be recognized less than one year from the original sale to the guest. As of April 30, 2021 and April 30, 2020, the Company recognized a contract liability of $30,719 and $11,180, respectively, related to the outstanding digital box top coupons and Casey's Rewards points, which is included in other accrued expenses on the consolidated balance sheets. Gift card related revenue is recognized as the gift cards are used by the guest. Gift card breakage revenue is recognized based on the estimated gift card breakage rate over the pro rata usage of the card.
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 a Team Member has met certain requirements in the award agreement. For example, if retirement provisions are satisfied which allow a Team Member to avoid forfeiture of the award upon a normal retirement from the Company, it is included in the basic earnings per share calculation . The calculation of diluted earnings per share treats stock options and unvested restricted stock units with time-based restrictions 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 a long-lived asset at the time an underground storage tank is installed. The Company amortizes the amount added to property and equipment on a straight-line basis 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 Team Member 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 the claim liability include the loss development factors, which includes the development time frame and settlement patterns, and expected loss rates, which includes 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, 2021, 2020, or 2019. From time to time, we participate in a forward buy of certain commodities - see further discussion in Note 9. These are not accounted for as derivatives under the normal purchase and sale exclusions within the applicable accounting 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 consolidated statements of income over the vesting period of the award, adjusted for certain retirement provisions. Additionally, certain awards include performance and market conditions. The majority of performance-based awards are based on either the achievement of a three-year average return on invested capital (ROIC) or a three-year cumulative earnings before interest, income taxes, depreciation, and amortization. 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. Additionally, if the Company's relative total shareholder return over the performance period is in the bottom or top quartile of the applicable peer group, the performance-based shares included will be adjusted downward by 25%, or upward by 25%, respectively (the "TSR Modifier"). 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
Segment reporting	Segment reporting: As of April 30, 2021, we operated 2,243 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 guests. 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 guests. We make specific disclosures concerning the three broad merchandise categories of fuel, grocery and other merchandise, and prepared food and 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 February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). As a result of this update, we recognized a right-of-use asset representing its right to use the underlying asset for the lease term and a lease liability for the obligation to make lease payments. Both the right-of-use asset and lease liability are measured at the present value of the lease payments, with subsequent measurement dependent on the classification of the lease as either a finance or an operating lease. In July 2018, the FASB issued ASU 2018-10, Leases (Topic 842) - Codification Improvements which contains several FASB Codification improvements for ASC Topic 842 , including several implementation issues and ASU 2018-11, "Leases (Topic 842) - Targeted Improvements" which provides entities with an additional transition method for implementing ASC Topic 842 . This update provided the option to apply the new standard at the adoption date, recognizing a cumulative-effect adjustment to the opening balance of retained earnings along with the modified retrospective approach previously identified, both of which include a number of practical expedients that companies may elect to apply. Under the cumulative-effect adjustment approach, comparative periods would not be restated. Under the modified retrospective approach, leases are recognized and measured under the noted guidance at the beginning of the earliest period presented. We adopted this guidance in the first quarter of fiscal 2020, using the modified retrospective approach and elected the cumulative-effect adjustment practical expedient. As a result of the transition method selected, the Company did not restate previously reported comparable periods. Please refer to Note 7 for additional information regarding ASC Topic 842 . In August 2018, the FASB issued ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This standard provides guidance on accounting for costs of implementation activities performed in a cloud computing arrangement that is a service contract. The amendments in the update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software and hosting arrangements that include an internal-use software license. The Company early adopted this guidance retrospectively, in the first quarter of fiscal 2019. The adoption did not have a material impact on our consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes . The standard includes changes that eliminate certain exceptions related to the approach for intraperiod tax allocation and the methodology for calculating income taxes in an interim period. It also simplifies aspects of the accounting for franchise taxes, certain transactions that result in a step-up in the tax basis of goodwill, and enacted changes in tax laws or rates. The Company is required to adopt this guidance in the first quarter of its fiscal 2022, with early adoption permitted. The Company does not expect the adoption of this standard to have a material impact on our consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The standard included optional guidance for a limited period of time to help ease the burden in accounting for the effects of reference rate reform. The new standard is effective for all entities through December 31, 2022. The Company does not expect this standard to have a material impact on our consolidated financial statements.
Leases	The Company is a lessee in situations where we lease property and equipment, most commonly land or building, from a lessor. The Company is a lessor in situations where the Company owns land or building and leases a portion or all of the property or equipment to a tenant. In both situations, leases are reported in accordance with ASC 842 - Leases . As a lessee, the Company recognizes a right-of-use asset representing its right to use the underlying asset for the lease term and a lease liability for the obligation to make lease payments. Both the right-of-use asset and lease liability are initially measured at the present value of the lease payments, with subsequent measurement dependent on the classification of the lease as either a finance or an operating lease. For leases with a term of twelve months or less, we have elected to not recognize lease assets and lease liabilities and will recognize lease expense on a straight-line basis over the lease term. The Company records the operating lease liability in accrued expenses and other long-term liabilities and records the finance lease liability within current maturities of long-term debt and long-term debt and finance lease obligations on the consolidated balance sheets. We have elected to adopt the package of practical expedients, as well as the land easement practical expedient. All lessor related activity is considered immaterial to the consolidated financial statements. The leases initially recorded under ASC 842 were recognized, at the time of adoption, at an amount equal to the present value of the lease payments using the incremental borrowing rate of debt based upon the remaining term of the lease. New leases are recognized at the present value of the lease payments using the implicit rate in the lease agreement when it is readily determinable. In the case the implicit rate is not readily determinable, the Company uses the incremental borrowing rate of debt based on the term of the lease.
Leases	The Company is a lessee in situations where we lease property and equipment, most commonly land or building, from a lessor. The Company is a lessor in situations where the Company owns land or building and leases a portion or all of the property or equipment to a tenant. In both situations, leases are reported in accordance with ASC 842 - Leases . As a lessee, the Company recognizes a right-of-use asset representing its right to use the underlying asset for the lease term and a lease liability for the obligation to make lease payments. Both the right-of-use asset and lease liability are initially measured at the present value of the lease payments, with subsequent measurement dependent on the classification of the lease as either a finance or an operating lease. For leases with a term of twelve months or less, we have elected to not recognize lease assets and lease liabilities and will recognize lease expense on a straight-line basis over the lease term. The Company records the operating lease liability in accrued expenses and other long-term liabilities and records the finance lease liability within current maturities of long-term debt and long-term debt and finance lease obligations on the consolidated balance sheets. We have elected to adopt the package of practical expedients, as well as the land easement practical expedient. All lessor related activity is considered immaterial to the consolidated financial statements. The leases initially recorded under ASC 842 were recognized, at the time of adoption, at an amount equal to the present value of the lease payments using the incremental borrowing rate of debt based upon the remaining term of the lease. New leases are recognized at the present value of the lease payments using the implicit rate in the lease agreement when it is readily determinable. In the case the implicit rate is not readily determinable, the Company uses the incremental borrowing rate of debt based on the term of the lease.

Significant Accounting Polici_3

Significant Accounting Policies (Tables)	12 Months Ended
Significant Accounting Policies (Tables)	Apr. 30, 2021
Accounting Policies [Abstract]
Summary of the Inventory Values	Below is a summary of the inventory values at April 30, 2021 and 2020: Years ended April 30, 2021 2020 Fuel $ 63,018 $ 33,695 Merchandise 223,580 202,312 Total inventory $ 286,598 $ 236,007
Depreciation of Property and Equipment and Amortization of Capital Lease Assets	Depreciation of property and equipment are computed using the straight-line method over the following estimated useful lives: Buildings 25-40 years Machinery and equipment 5-40 years Finance lease right-of-use assets Lesser of term of lease or life of asset Leasehold improvements Lesser of term of lease or life of asset

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
Acquisitions (Tables)	Apr. 30, 2021
Business Combinations [Abstract]
Allocation of Purchase Price	Allocation of the purchase price for the transactions in aggregate for the year ended April 30, 2021 is as follows (in thousands): Assets acquired: Inventories $ 249 Property and equipment 9,117 Total assets 9,366 Liabilities assumed: Accrued expenses 10 Total liabilities 10 Net tangible assets acquired 9,356 Goodwill — Total consideration paid $ 9,356

Fair Value of Financial Instr_2

Fair Value of Financial Instruments and Long Term Debt (Tables)	12 Months Ended
	Apr. 30, 2021
Fair Value Disclosures [Abstract]
Carrying Value of Long-Term Debt	The carrying amount of the Company’s long-term debt and finance lease obligations by issuance is as follows: As of April 30, 2021 2020 Finance lease liabilities (Note 7) $ 14,085 $ 16,746 5.22% Senior notes due August 9, 2020 $ — 569,000 3.67% Senior notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028 150,000 150,000 3.75% Senior notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028 50,000 50,000 3.65% Senior notes (Series C) due in 7 installments beginning May 2, 2025 and ending May 2, 2031 50,000 50,000 3.72% Senior notes (Series D) due in 7 installments beginning October 28, 2025 and ending October 28, 2031 50,000 50,000 3.51% Senior notes (Series E) due June 13, 2025 150,000 150,000 3.77% Senior notes (Series F) due August 22, 2028 250,000 250,000 2.85% Senior notes (Series G) due August 7, 2030 325,000 — 2.96% Senior notes (Series H) due August 6, 2032 325,000 — Debt issuance costs (336) — 1,363,749 1,285,746 Less current maturities (1) 2,354 571,244 $ 1,361,395 $ 714,502 (1) Current maturities is presented gross in the table above, but net of unamortized debt issuance costs of $964 on the consolidated balance sheets for the year ended April 30, 2020.
Schedule of Maturities of Long-term Debt Including Capitalized Lease Obligations	Listed below are the aggregate maturities of long-term debt, including finance lease obligations, for the 5 years commencing May 1, 2021 and thereafter: Years ended April 30, Finance Leases Senior Notes Total 2022 $ 2,354 $ — $ 2,354 2023 2,484 20,000 22,484 2024 2,060 32,000 34,060 2025 734 32,000 32,734 2026 471 192,000 192,471 Thereafter 5,982 1,074,000 1,079,982 $ 14,085 $ 1,350,000 $ 1,364,085
Finance Lease, Liability, Maturity	Listed below are the aggregate maturities of long-term debt, including finance lease obligations, for the 5 years commencing May 1, 2021 and thereafter: Years ended April 30, Finance Leases Senior Notes Total 2022 $ 2,354 $ — $ 2,354 2023 2,484 20,000 22,484 2024 2,060 32,000 34,060 2025 734 32,000 32,734 2026 471 192,000 192,471 Thereafter 5,982 1,074,000 1,079,982 $ 14,085 $ 1,350,000 $ 1,364,085 Future minimum payments under the finance leases and operating leases with initial or remaining terms of one year or more consisted of the following at April 30, 2021: Years ended April 30, Finance leases Operating leases 2022 $ 3,110 $ 1,794 2023 3,116 1,693 2024 2,565 1,658 2025 1,167 1,663 2026 872 1,679 Thereafter 9,893 25,575 Total minimum lease payments 20,723 34,062 Less amount representing interest 6,638 12,997 Present value of net minimum lease payments $ 14,085 $ 21,065

Preferred and Common Stock (Tab

Preferred and Common Stock (Tables)	12 Months Ended
Preferred and Common Stock (Tables)	Apr. 30, 2021
Share-based Payment Arrangement [Abstract]
Schedule of Restricted Stock and Restricted Stock Unit Grants	The following table summarizes the equity-related grants made during the three-year period ended April 30, 2021 : Date of Grant Type of Grant Shares Granted Recipients Vesting Date Fair Value at Grant Date May 24, 2018 Restricted Stock Units 88,846 Key Employees May 24, 2021 $8,593 June 8, 2018 Restricted Stock Units (1) 75,402 Officers June 8, 2021 $7,571 September 5, 2018 Restricted Stock Units 7,984 Non-Employee Board Members 2019 Annual Shareholders' Meeting Date $920 June 4, 2019 Restricted Stock Units 75,959 Key Employees June 4, 2022 $9,886 June 4, 2019 Restricted Stock Units (1) 59,579 Officers June 4, 2022 $9,097 June 24, 2019 Restricted Stock Units (2) 32,786 CEO Various (2) $5,700 September 4, 2019 Restricted Stock Units 5,504 Non-Employee Board Members 2020 Annual Shareholders' Meeting Date $919 December 23, 2019 Restricted Stock Units (3) 5,000 CEO Various (3) $788 Fiscal 2020 -Various Restricted Stock Units (4) 8,444 Officers Various (4) $1,368 Fiscal 2020 -Various Restricted Stock Units (5) 1,763 Officers Various (5) $354 Fiscal 2021 -Various Restricted Stock Units 80,050 Key Employees Vests ratably on anniversary date over three-year period $13,417 Fiscal 2021 -Various Restricted Stock Units (6) 94,756 Officers Various (6) $17,856 September 2, 2020 Restricted Stock Units 5,240 Non-Employee Board Members 2021 Annual Shareholders' Meeting Date $951 Fiscal 2021 -Various Restricted Stock Units (7) 29,890 Key Employees and Officers Various (7) $5,153 (1) This grant of restricted stock units ("RSUs") includes time-based, performance-based and market-based awards. The performance-based awards represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three y $4.2 million for the 2018 grant and $6.9 million for the 2019 grant (compared to a grant date fair value of $2.8 million and $3.4 million, respectively), will be recognized on a straight-line basis over the vesting period, subject to acceleration for retirement provisions. The market-based awards incorporate market conditions in determining fair value as of the grant date, and will also range from 0% to 200% of "target". Total market-based expense of approximately $2.6 million for the 2018 grant and $3.1 million for the 2019 grant, will be recognized on a straight-line basis over the vesting period, subject to acceleration for retirement provisions. (2) This grant of RSUs includes time-based awards that vest ratably on each June 24, 2020 through 2022, along with a market-based award vesting June 24, 2022. The market-based award incorporates market conditions in determining fair value on the grant date and will range from 0% to 200% of target. Total market-based expense of approximately $1.8 million will be recognized on a straight-line basis over the vesting period. (3) This grant of RSUs includes performance-based awards which are calculated based upon targets achieved over a performance period of January 1, 2020 to December 31, 2020. If the performance targets are met, the units vest ratably on each January 15, 2021 through 2023. (4) These grants of RSUs were issued to various officers throughout the fiscal year. The grants were comprised of time-based awards and vest in accordance with the vesting schedules in the award agreements, ranging from January 2021 to January 2023. (5) These grants of RSUs were issued to various officers throughout the fiscal year. The grants include time-based, performance-based and market-based awards. The performance-based awards represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three (6) These grants of RSUs were issued to officers throughout the year. The grants include time-based awards and performance-based awards. The time-based awards vest ratably over a three-year period commencing on the first anniversary of the grant date. The performance-based awards represent a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three (7) These grants of RSUs were issued to officers and key employees throughout the year. The grants includes primarily time-based awards, as well as a performance-based award. The time-based awards vest in accordance with the vesting schedules in the award agreements, ranging from June 2021 to June 2023. The grant also includes one performance-based award that represents a “target” amount; the final amount earned is based on the satisfaction of certain performance measures over a three
Schedule of Stock Options Activity	Information concerning the issuance of stock options under the 2009 Plan is presented in the following table (no stock option awards have been granted under the 2018 Plan): Number Weighted Outstanding at April 30, 2018 181,673 $ 39.48 Exercised (71,546) 32.02 Forfeited (300) 25.26 Outstanding at April 30, 2019 109,827 $ 44.39 Exercised (66,638) 44.39 Outstanding at April 30, 2020 43,189 $ 44.39 Exercised (40,189) 44.39 Outstanding at April 30, 2021 3,000 $ 44.39
Schedule of Restricted Stock Units Award Activity	Information concerning the issuance of restricted stock units under the 2018 Plan and the 2009 Plan is presented in the following table: Unvested at April 30, 2018 338,981 Granted 172,232 Vested (104,166) Forfeited (10,530) Performance Award Adjustments (7,717) Unvested at April 30, 2019 388,800 Granted 189,035 Vested (108,484) Forfeited (25,146) Performance Award Adjustments 29,594 Unvested at April 30, 2020 473,799 Granted 209,936 Vested (154,842) Forfeited (12,275) Performance Award Adjustments 130,302 Unvested at April 30, 2021 646,920

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	12 Months Ended
Net Income Per Common Share (Tables)	Apr. 30, 2021
Earnings Per Share [Abstract]
Schedule of Basic and Diluted Earnings Per Share	Computations for basic and diluted earnings per common share are presented below: Years ended April 30, 2021 2020 2019 Basic Net income $ 312,900 $ 263,846 $ 203,886 Weighted average shares outstanding-basic 37,092,273 36,956,115 36,709,940 Basic earnings per common share $ 8.44 $ 7.14 $ 5.55 Diluted Net income $ 312,900 $ 263,846 $ 203,886 Weighted-average shares outstanding-basic 37,092,273 36,956,115 36,709,940 Plus effect of stock options and restricted stock units 263,865 229,713 265,447 Weighted-average shares outstanding-diluted 37,356,138 37,185,828 36,975,387 Diluted earnings per common share $ 8.38 $ 7.10 $ 5.51

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Income tax expense attributable to earnings consisted of the following components: Years ended April 30, 2021 2020 2019 Current tax expense: Federal $ 73,950 $ 22,182 10,326 State 16,397 6,210 3,853 90,347 28,392 14,179 Deferred tax expense 4,123 49,810 45,337 Total income tax expense $ 94,470 $ 78,202 59,516
Schedule of Deferred Tax Assets and Liabilities	The tax effects of temporary differences that gave rise to significant portions of the deferred tax assets and deferred tax liabilities were as follows: As of April 30, 2021 2020 Deferred tax assets: Accrued liabilities and reserves $ 29,583 $ 12,423 Workers compensation 9,000 8,303 Operating and finance lease obligations 9,186 10,006 Asset retirement obligations 6,294 5,881 Deferred compensation 4,221 3,781 Equity compensation 9,131 7,083 State net operating losses & tax credits 928 424 Other 3,068 1,745 Total gross deferred tax assets 71,411 49,646 Less valuation allowance — 47 Total net deferred tax assets 71,411 49,599 Deferred tax liabilities: Property and equipment depreciation (484,065) (460,805) Goodwill (27,047) (24,348) Other (20) (44) Total gross deferred tax liabilities (511,132) (485,197) Net deferred tax liability $ (439,721) (435,598)
Schedule of Effective Income Tax Rate Reconciliation	Years ended April 30, 2021 2020 2019 Income taxes at the statutory rates 21.0 % 21.0 % 21.0 % Impact of Tax Reform Act — % — % 0.4 % Federal tax credits (1.5) % (1.9) % (2.3) % State income taxes, net of federal tax benefit 3.5 % 4.0 % 4.3 % Impact of phased-in state law changes, net of federal benefit — % (0.2) % (1.8) % ASU 2016-09 benefit (stock-based compensation) (0.6) % (0.5) % (0.6) % Other 0.8 % 0.5 % 1.6 % 23.2 % 22.9 % 22.6 %
Schedule of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: 2021 2020 Beginning balance $ 8,907 $ 7,287 Additions based on tax positions related to current year 2,356 2,780 Reductions due to lapse of applicable statute of limitations (1,947) (1,160) Ending balance $ 9,316 $ 8,907

Leases - (Tables)

Leases - (Tables)	12 Months Ended
Leases - (Tables)	Apr. 30, 2021
Leases [Abstract]
Assets And Liabilities, Lessee	Lease right-of-use assets outstanding as of April 30, 2021 and 2020 consisted of the following: Classification April 30, 2021 April 30, 2020 Finance lease right-of-use assets Property and equipment $ 11,711 $ 14,583 Operating lease right-of-use assets Other assets $ 20,145 $ 21,143 Weighted average remaining lease terms, weighted average discount rates, and supplementary cash flow information for outstanding leases were as follows: April 30, 2021 April 30, 2020 Weighted-average remaining lease-term - finance lease 10.9 10.9 Weighted-average remaining lease-term - operating lease 20.4 20.4 Weighted-average discount rate - finance lease 5.38 % 5.34 % Weighted-average discount rate - operating lease 4.42 % 4.25 % Right-of-use assets obtained in exchange for new finance lease liabilities $ — $ 1,520 Right-of-use assets obtained in exchange for new operating lease liabilities $ 1,109 $ 2,840
Finance Lease, Liability, Maturity	Listed below are the aggregate maturities of long-term debt, including finance lease obligations, for the 5 years commencing May 1, 2021 and thereafter: Years ended April 30, Finance Leases Senior Notes Total 2022 $ 2,354 $ — $ 2,354 2023 2,484 20,000 22,484 2024 2,060 32,000 34,060 2025 734 32,000 32,734 2026 471 192,000 192,471 Thereafter 5,982 1,074,000 1,079,982 $ 14,085 $ 1,350,000 $ 1,364,085 Future minimum payments under the finance leases and operating leases with initial or remaining terms of one year or more consisted of the following at April 30, 2021: Years ended April 30, Finance leases Operating leases 2022 $ 3,110 $ 1,794 2023 3,116 1,693 2024 2,565 1,658 2025 1,167 1,663 2026 872 1,679 Thereafter 9,893 25,575 Total minimum lease payments 20,723 34,062 Less amount representing interest 6,638 12,997 Present value of net minimum lease payments $ 14,085 $ 21,065
Lessee, Operating Lease, Liability, Maturity	Future minimum payments under the finance leases and operating leases with initial or remaining terms of one year or more consisted of the following at April 30, 2021: Years ended April 30, Finance leases Operating leases 2022 $ 3,110 $ 1,794 2023 3,116 1,693 2024 2,565 1,658 2025 1,167 1,663 2026 872 1,679 Thereafter 9,893 25,575 Total minimum lease payments 20,723 34,062 Less amount representing interest 6,638 12,997 Present value of net minimum lease payments $ 14,085 $ 21,065

Significant Accounting Polici_4

Significant Accounting Policies (Details) $ in Thousands		12 Months Ended
Significant Accounting Policies (Details) $ in Thousands		Apr. 30, 2021USD ($)segmentstoremerchandise_categorystatepeople	Apr. 30, 2020USD ($)	Apr. 30, 2019USD ($)	Apr. 30, 2018USD ($)
Accounting Policies [Abstract]
Number of stores \| store		2,243
Number of states in which entity operates \| state		16
Population of communities (many less than) \| people		5,000
Concentration Risk
Shareholders' equity		$ 1,932,679	$ 1,643,205	$ 1,408,769	$ 1,271,141
Deferred income taxes		439,721	435,598
Excess of current cost over the stated LIFO Value		93,158	87,546
Goodwill		161,075	161,075
Asset impairment charges		3,846	1,177	1,167
Excise taxes collected	[1]	1,053,000	1,063,000	$ 988,000
Contract liability		30,719	11,180
Discounted liability of asset retirement obligation		24,411	22,658
Self insurance reserve		$ 50,526	44,959
Number of operating segments \| segment		1
Number of reportable segments \| segment		1
Number of merchandise categories \| merchandise_category		3
Fuel \| Retail Sales
Concentration Risk
Concentration risk percentage		55.00%
Grocery And Other Merchandise \| Retail Sales
Concentration Risk
Concentration risk percentage		31.00%
Prepared Food And Fountain \| Retail Sales
Concentration Risk
Concentration risk percentage		13.00%
Other \| Retail Sales
Concentration Risk
Concentration risk percentage		1.00%
Capitalized software costs
Concentration Risk
Finite-lived intangible assets		$ 42,881	$ 38,593
Capitalized software costs \| Minimum
Concentration Risk
Intangible asset useful life		2 years
Capitalized software costs \| Maximum
Concentration Risk
Intangible asset useful life		13 years

[1]	Includes excise taxes of approximately $1,053,000, $1,063,000 and $988,000

Significant Accounting Polici_5

Significant Accounting Policies - Summary of the Inventory Values (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Inventory
Inventory	$ 286,598	$ 236,007
Fuel
Inventory
Inventory	63,018	33,695
Merchandise
Inventory
Inventory	$ 223,580	$ 202,312

Significant Accounting Polici_6

Significant Accounting Policies - Depreciation of Property and Equipment and Amortization of Capital Lease Assets (Details)	12 Months Ended
	Apr. 30, 2021
Buildings \| Minimum
Property, Plant and Equipment
Property, plant and equipment useful life	25 years
Buildings \| Maximum
Property, Plant and Equipment
Property, plant and equipment useful life	40 years
Machinery and Equipment \| Minimum
Property, Plant and Equipment
Property, plant and equipment useful life	5 years
Machinery and Equipment \| Maximum
Property, Plant and Equipment
Property, plant and equipment useful life	30 years

Acquisitions (Details)

Acquisitions (Details)	12 Months Ended
Acquisitions (Details)	Apr. 30, 2021store
Business Combinations [Abstract]
Number of stores acquired	5
Number of stores opened	2
Number of stores expected to open in next fiscal year	3

Acquisitions - Allocation of Pu

Acquisitions - Allocation of Purchase Price (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Liabilities assumed:
Goodwill	$ 161,075	$ 161,075
Series of Individually Immaterial Business Acquisitions
Assets acquired:
Inventories	249
Property and equipment	9,117
Total assets	9,366
Liabilities assumed:
Accrued expenses	10
Total liabilities	10
Net tangible assets acquired	9,356
Goodwill	0
Total consideration paid	$ 9,356

Fair Value of Financial Instr_3

Fair Value of Financial Instruments and Long Term Debt (Details) - USD ($)	Dec. 23, 2020	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019	Dec. 22, 2020	Nov. 08, 2020	Aug. 07, 2020	Jan. 31, 2020
Debt Instrument
Long-term debt and capital lease obligations		$ 1,408,000,000	$ 1,341,000,000
Interest income		168,000	860,000	$ 595,000
Capitalized interest		4,537,000	5,258,000	$ 3,057,000
Current maturities of long-term debt and finance lease obligations		$ 2,354,000	570,280,000
Bank Line
Debt Instrument
Interest over variable index		1.00%
Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility
Debt Instrument
Maximum borrowing capacity	$ 450,000,000				$ 300,000,000
Line of credit facility, increase	$ 150,000,000
Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility \| Alternate Base Rate
Debt Instrument
Effective percentage	1.00%
Unsecured Revolving Credit Facility Due January 2024 \| Line of Credit
Debt Instrument
Maximum borrowing capacity	$ 300,000,000
Facility fee percentage repaid quarterly		1.25%
Line of Credit \| Revolving Credit Facility
Debt Instrument
Fair value of amount outstanding		$ 0	$ 120,000,000
Line of Credit \| Bank Line
Debt Instrument
Maximum borrowing capacity								$ 25,000
Fair value of amount outstanding		$ 0
Bridge Loan \| Unsecured Revolving Line of Credit
Debt Instrument
Maximum borrowing capacity						$ 100,000,000
Senior Notes
Debt Instrument
Debt instrument, face amount							$ 650,000
Senior Notes \| Series G Notes
Debt Instrument
Debt instrument, face amount							$ 325,000
Interest rate							2.85%
Senior Notes \| Series H Notes
Debt Instrument
Debt instrument, face amount							$ 325,000
Interest rate							2.96%
Senior Notes \| Five Point Two Two Senior Notes Due August 2020
Debt Instrument
Interest rate		5.22%
Current maturities of long-term debt and finance lease obligations		$ 569,000
Minimum \| Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility
Debt Instrument
Facility fee percentage		0.20%
Minimum \| Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable rate	1.05%
Effective percentage	0.75%
Minimum \| Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility \| Alternate Base Rate
Debt Instrument
Basis spread on variable rate	0.05%
Minimum \| Unsecured Revolving Credit Facility Due January 2024 \| Line of Credit
Debt Instrument
Facility fee percentage	0.20%
Minimum \| Unsecured Revolving Credit Facility Due January 2024 \| Line of Credit \| London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable rate	1.55%
Minimum \| Unsecured Revolving Credit Facility Due January 2024 \| Line of Credit \| Alternate Base Rate
Debt Instrument
Basis spread on variable rate	0.20%
Maximum \| Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility
Debt Instrument
Facility fee percentage		0.40%
Maximum \| Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable rate	1.85%
Maximum \| Unsecured Revolving Credit Facility Due January 2024 \| Revolving Credit Facility \| Alternate Base Rate
Debt Instrument
Basis spread on variable rate	0.85%
Maximum \| Unsecured Revolving Credit Facility Due January 2024 \| Line of Credit
Debt Instrument
Facility fee percentage	0.40%
Maximum \| Unsecured Revolving Credit Facility Due January 2024 \| Line of Credit \| London Interbank Offered Rate (LIBOR)
Debt Instrument
Basis spread on variable rate	2.60%
Maximum \| Unsecured Revolving Credit Facility Due January 2024 \| Line of Credit \| Alternate Base Rate
Debt Instrument
Basis spread on variable rate	1.60%

Fair Value of Financial Instr_4

Fair Value of Financial Instruments and Long Term Debt - Carrying Value of Long-term Debt (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2021USD ($)installment_payment	Apr. 30, 2020USD ($)installment_payment
Debt Instrument
Finance lease liabilities (Note 7)	$ 14,085	$ 16,746
Long-term debt	1,350,000
Debt issuance costs	(336)	0
Total	1,363,749	1,285,746
Less current maturities (1)	2,354	571,244
Long-term debt and finance lease obligations, net of current maturities	1,361,395	$ 714,502
Debt issuance costs	$ 964
Senior Notes \| 5.22% Senior notes due August 9, 2020
Debt Instrument
Interest rate	5.22%	5.22%
Long-term debt	$ 0	$ 569,000
Senior Notes \| 3.67% Senior notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028
Debt Instrument
Interest rate	3.67%	3.67%
Number of payments \| installment_payment	7	7
Long-term debt	$ 150,000	$ 150,000
Senior Notes \| 3.75% Senior notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028
Debt Instrument
Interest rate	3.75%	3.75%
Number of payments \| installment_payment	7	7
Long-term debt	$ 50,000	$ 50,000
Senior Notes \| 3.65% Senior notes (Series C) due in 7 installments beginning May 2, 2025 and ending May 2, 2031
Debt Instrument
Interest rate	3.65%	3.65%
Number of payments \| installment_payment	7	7
Long-term debt	$ 50,000	$ 50,000
Senior Notes \| 3.72% Senior notes (Series D) due in 7 installments beginning October 28, 2025 and ending October 28, 2031
Debt Instrument
Interest rate	3.72%	3.72%
Number of payments \| installment_payment	7	7
Long-term debt	$ 50,000	$ 50,000
Senior Notes \| 3.51% Senior notes (Series E) due June 13, 2025
Debt Instrument
Interest rate	3.51%
Long-term debt	$ 150,000	150,000
Senior Notes \| 3.77% Senior notes (Series F) due August 22, 2028
Debt Instrument
Interest rate	3.77%
Long-term debt	$ 250,000	250,000
Senior Notes \| 2.85% Senior notes (Series G) due August 7, 2030
Debt Instrument
Interest rate	2.85%
Long-term debt	$ 325,000	0
Senior Notes \| 2.96% Senior notes (Series H) due August 6, 2032
Debt Instrument
Interest rate	2.96%
Long-term debt	$ 325,000	$ 0

Fair Value of Financial Instr_5

Fair Value of Financial Instruments and Long Term Debt - Schedule of Maturities of Long-Term Debt Including Capitalizied Leases (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Finance Leases
2022	$ 2,354
2023	2,484
2024	2,060
2025	734
2026	471
Thereafter	5,982
Finance Leases	14,085	$ 16,746
Senior Notes
2022	0
2023	20,000
2024	32,000
2025	32,000
2026	192,000
Thereafter	1,074,000
Senior Notes	1,350,000
Total
2022	2,354
2023	22,484
2024	34,060
2025	32,734
2026	192,471
Thereafter	1,079,982
Total	$ 1,364,085

Preferred and Common Stock (Det

Preferred and Common Stock (Details) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended				15 Months Ended
Preferred and Common Stock (Details) - USD ($)	Mar. 31, 2018	Apr. 30, 2021	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2017	May 31, 2018	Apr. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award
Shares issued of preferred stock (shares)		0	0	0
Options outstanding (shares)		3,000	3,000
Aggregate intrinsic value of outstanding options		$ 533,000	$ 533,000
Aggregate intrinsic value of exercised options			$ 5,297,000
Repurchase of common stock					$ 35,247,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Reduction in available shares per stock option issued (shares)		1	1
Options outstanding (shares)		3,000	3,000	43,189	109,827			181,673
Weighted average remaining contractual life (years)			2 months 1 day
Weighted average exercise price (in Dollars per share)		$ 44.39	$ 44.39	$ 44.39	$ 44.39			$ 39.48
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award
Reduction in available shares per restricted stock or restricted stock unit issued (shares)		2	2
Stock Options, Restricted Stock and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation expense			$ 31,986,000	$ 18,129,000	$ 16,410,000
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award
Shares available for grant under the Plan (shares)		2,211,232	2,211,232
Unrecognized compensation costs		$ 36,717,000	$ 36,717,000
2017 Stock Repurchase Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share repurchase program authorized amount						$ 300,000,000	$ 300,000,000
Share repurchase program period in force						2 years
Common stock shares repurchased (shares)							2,794,192
2018 Stock Repurchase Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share repurchase program authorized amount	$ 300,000,000
Share repurchase program period in force	2 years
Repurchase of common stock		$ 0
Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award
Authorized shares of preferred stock (shares)		1,000,000	1,000,000
Shares issued of preferred stock (shares)		0	0
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award
Authorized shares of preferred stock (shares)		250,000	250,000
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Authorized shares of common stock (shares)		120,000,000	120,000,000

Preferred and Common Stock- Sch

Preferred and Common Stock- Schedule of Restricted Stock and Restricted Stock Units Granted (Details) - USD ($) $ in Thousands	Sep. 02, 2020	Dec. 23, 2019	Sep. 04, 2019	Jun. 24, 2019	Jun. 04, 2019	Sep. 05, 2018	Jun. 08, 2018	May 24, 2018	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted									209,936	189,035	172,232
Key Employees \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted					75,959,000			88,846,000
Fair Value at Grant Date					$ 9,886			$ 8,593
Officers \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted					59,579,000		75,402,000
Fair Value at Grant Date					$ 9,097		$ 7,571
Officers \| Stock Incentive Plan \| Restricted Stock Units, Performance-Based
Share-based Compensation Arrangement by Share-based Payment Award
Award vesting period									3 years
Compensation not yet recognized					6,900		4,200		$ 24,100	$ 310
Compensation not yet recognized, fair value					3,400		2,800		$ 13,900	$ 177
Officers \| Stock Incentive Plan \| Restricted Stock Units, Market-Based
Share-based Compensation Arrangement by Share-based Payment Award
Compensation not yet recognized					$ 3,100		$ 2,600
Non-Employee Board Members \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted	5,240,000		5,504,000			7,984,000
Fair Value at Grant Date	$ 951		$ 919			$ 920
CEO \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted		5,000,000		32,786,000
Fair Value at Grant Date		$ 788		$ 5,700
CEO \| Stock Incentive Plan \| Restricted Stock Units, Time-Based
Share-based Compensation Arrangement by Share-based Payment Award
Compensation not yet recognized				$ 1,800
Key Employees and Officers \| Stock Incentive Plan \| Restricted Stock Units, Performance-Based
Share-based Compensation Arrangement by Share-based Payment Award
Award vesting period									3 years
Compensation not yet recognized									$ 2,200
Compensation not yet recognized, fair value									$ 1,300
Minimum \| Officers \| Stock Incentive Plan \| Restricted Stock Units, Performance-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									0.00%
Minimum \| Officers \| Stock Incentive Plan \| Restricted Stock Units, Market-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									0.00%
Minimum \| CEO \| Stock Incentive Plan \| Restricted Stock Units, Time-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									0.00%
Minimum \| Key Employees and Officers \| Stock Incentive Plan \| Restricted Stock Units, Performance-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									0.00%
Maximum \| Officers \| Stock Incentive Plan \| Restricted Stock Units, Performance-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									200.00%
Maximum \| Officers \| Stock Incentive Plan \| Restricted Stock Units, Market-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									200.00%
Maximum \| CEO \| Stock Incentive Plan \| Restricted Stock Units, Time-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									200.00%
Maximum \| Key Employees and Officers \| Stock Incentive Plan \| Restricted Stock Units, Performance-Based
Share-based Compensation Arrangement by Share-based Payment Award
Target allocation percentage									200.00%
Tranche One \| Key Employees \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted									80,050,000
Fair Value at Grant Date									$ 13,417
Tranche One \| Officers \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted										8,444,000
Fair Value at Grant Date										$ 1,368
Tranche Two \| Officers \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted									94,756,000	1,763,000
Fair Value at Grant Date									$ 17,856	$ 354
Tranche Two \| Officers \| Stock Incentive Plan \| Restricted Stock Units, Market-Based
Share-based Compensation Arrangement by Share-based Payment Award
Compensation not yet recognized										$ 177
Tranche Three \| Key Employees and Officers \| Stock Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Shares Granted									29,890,000
Fair Value at Grant Date									$ 5,153

Preferred and Common Stock - Sc

Preferred and Common Stock - Schedule of Stock Options Activity (Details) - $ / shares	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Number of option shares
Ending balance (in shares)	3,000
Stock Options
Number of option shares
Beginning balance (in shares)	43,189	109,827	181,673
Exercised (in shares)	(40,189)	(66,638)	(71,546)
Forfeited (in shares)			(300)
Ending balance (in shares)	3,000	43,189	109,827
Weighted average option exercise price
Beginning balance (in Dollars per share)	$ 44.39	$ 44.39	$ 39.48
Exercised (in Dollars per share)	44.39	44.39	32.02
Forfeited (in Dollars per share)			25.26
Ending balance (in Dollars per share)	$ 44.39	$ 44.39	$ 44.39

Preferred and Common Stock - _2

Preferred and Common Stock - Schedule of Restricted Stock Units Award Activity (Details) - Restricted Stock Units - shares	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Number of restricted stock units
Beginning balance (in shares)	473,799	388,800	338,981
Granted (in shares)	209,936	189,035	172,232
Vested (in shares)	(154,842)	(108,484)	(104,166)
Forfeited (in shares)	(12,275)	(25,146)	(10,530)
Performance Award Adjustments (in shares)	130,302	29,594	(7,717)
Ending balance (in shares)	646,920	473,799	388,800

Net Income Per Common Share - S

Net Income Per Common Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Basic
Net income	$ 312,900	$ 263,846	$ 203,886
Weighted average shares outstanding-basic (shares)	37,092,273	36,956,115	36,709,940
Basic earnings per common share (in Dollars per share)	$ 8.44	$ 7.14	$ 5.55
Diluted
Net income	$ 312,900	$ 263,846	$ 203,886
Weighted average shares outstanding-basic (shares)	37,092,273	36,956,115	36,709,940
Plus effect of stock options and restricted stock units (shares)	263,865	229,713	265,447
Weighted-average shares outstanding-diluted (shares)	37,356,138	37,185,828	36,975,387
Diluted earnings per common share (in Dollars per share)	$ 8.38	$ 7.10	$ 5.51

Income Taxes - Schedule of Comp

Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Current tax expense:
Federal	$ 73,950	$ 22,182	$ 10,326
State	16,397	6,210	3,853
Current income tax expense (benefit)	90,347	28,392	14,179
Deferred tax expense	4,123	49,810	45,337
Total income tax expense	$ 94,470	$ 78,202	$ 59,516

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Deferred tax assets:
Accrued liabilities and reserves	$ 29,583	$ 12,423
Workers compensation	9,000	8,303
Operating and finance lease obligations	9,186	10,006
Asset retirement obligations	6,294	5,881
Deferred compensation	4,221	3,781
Equity compensation	9,131	7,083
State net operating losses & tax credits	928	424
Other	3,068	1,745
Total gross deferred tax assets	71,411	49,646
Less valuation allowance	0	47
Total net deferred tax assets	71,411	49,599
Deferred tax liabilities:
Property and equipment depreciation	(484,065)	(460,805)
Goodwill	(27,047)	(24,348)
Other	(20)	(44)
Total gross deferred tax liabilities	(511,132)	(485,197)
Net deferred tax liability	$ (439,721)	$ (435,598)

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Operating Loss Carryforwards [Line Items]
Less valuation allowance	$ 0	$ 47
Unrecognized tax benefits	9,316	8,907	$ 7,287
Unrecognized tax benefits that would impact effective tax rate	7,360
Increase (decrease) in unrecognized tax benefits	409
Accrued interest and penalties	370	354
Increase in tax expense	16	$ 112
Decrease in unrecognized tax benefits is reasonable possible	2,000
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	67,399
Tax Credit Carryforward, Amount	$ 984

Income Taxes - Schedule of Effe

Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
Income Tax Disclosure [Abstract]
Income taxes at the statutory rates	21.00%	21.00%	21.00%
Impact of Tax Reform Act	0.00%	0.00%	0.40%
Federal tax credits	(1.50%)	(1.90%)	(2.30%)
State income taxes, net of federal tax benefit	3.50%	4.00%	4.30%
Impact of phased-in state law changes, net of federal benefit	0.00%	(0.20%)	(1.80%)
ASU 2016-09 benefit (stock-based compensation)	(0.60%)	(0.50%)	(0.60%)
Other	0.80%	0.50%	1.60%
Effective income tax rate	23.20%	22.90%	22.60%

Income Taxes - Schedule of Unre

Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 8,907	$ 7,287
Additions based on tax positions related to current year	2,356	2,780
Reductions due to lapse of applicable statute of limitations	(1,947)	(1,160)
Ending balance	$ 9,316	$ 8,907

Leases - Assets and Liabilities

Leases - Assets and Liabilities of Lessee (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Leases [Abstract]
Finance lease right-of-use assets	$ 11,711	$ 14,583
Operating lease right-of-use assets	$ 20,145	$ 21,143
Weighted-average remaining lease-term - finance lease	10 years 10 months 24 days	10 years 10 months 24 days
Weighted-average remaining lease-term - operating lease	20 years 4 months 24 days	20 years 4 months 24 days
Weighted-average discount rate - finance lease	5.38%	5.34%
Weighted-average discount rate - operating lease	4.42%	4.25%
Right-of-use assets obtained in exchange for new finance lease liabilities (in thousands)	$ 0	$ 1,520
Right-of-use assets obtained in exchange for new operating lease liabilities (in thousands)	$ 1,109	$ 2,840

Leases - Lease Maturity Schedul

Leases - Lease Maturity Schedule (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Finance Leases
2022	$ 3,110
2023	3,116
2024	2,565
2025	1,167
2026	872
Thereafter	9,893
Total minimum lease payments	20,723
Less amount representing interest	6,638
Present value of net minimum lease payments	14,085	$ 16,746
Operating leases
2022	1,794
2023	1,693
2024	1,658
2025	1,663
2026	1,679
Thereafter	25,575
Total minimum lease payments	34,062
Less amount representing interest	12,997
Present value of net minimum lease payments	$ 21,065

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	Jan. 31, 2021USD ($)
City of Joplin Missouri
Other Commitments
Bonds issued	$ 51.4

Benefit Plans (Details)

Benefit Plans (Details) $ in Thousands	12 Months Ended
Benefit Plans (Details) $ in Thousands	Apr. 30, 2021USD ($)executiveshares	Apr. 30, 2020USD ($)shares	Apr. 30, 2019USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Expected future payments, 2022	$ 401
Accrued deferred compensation liability	2,326	$ 3,793
Deferred compensation expense incurred	44	2,727	$ (97)
Other Postretirement Benefits Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Employer discretionary contribution	$ 10,382	$ 10,571	9,918
Common stock held by trustee of the 401K plan (shares) \| shares	909,161	1,113,882
Supplemental Employee Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Number of executives covered under SERP \| executive	2
Number of executives covered under SERP, retired \| executive	1
Annual benefit amount (percent of base compensation)	50.00%
Duration of benefits	20 years
Accrued deferred compensation liability	$ 2,866	$ 3,434
Expected future payments, 2022	637
Expected future payments, 2023	637
Expected future payments, 2024	354
Expected future payments, 2025	354
Expected future payments, 2026	354
Pension and post-retirement expense incurred	$ 67	$ 269	$ 221
Minimum \| Supplemental Employee Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Discount rate	1.36%	2.04%
Maximum \| Supplemental Employee Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block
Discount rate	2.52%	2.44%

Commitments (Details)

Commitments (Details)	12 Months Ended
Commitments (Details)	Apr. 30, 2021USD ($)employee
Other Commitments
Number of other key employees covered by employment agreements \| employee	25
Inventories
Other Commitments
Monthly commitment \| $	$ 3,900

Contingencies (Details)

Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
Contingencies (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Apr. 30, 2020
Loss Contingency [Abstract]
Accrued environmental liability	$ 368	$ 328
Loss Contingencies [Line Items]
Letters of credit outstanding	24,000	21,526
Self insurance reserve	50,526	$ 44,959
General Liability and Auto Liability Insurance
Loss Contingencies [Line Items]
Annual stop loss limit	1,000
Workers' Compensation Insurance
Loss Contingencies [Line Items]
Annual stop loss limit	$ 500

Subsequent Events (Details)

Subsequent Events (Details)	May 13, 2021USD ($)store	Jun. 25, 2021USD ($)store	Apr. 30, 2021store
Subsequent Event [Line Items]
Number of stores acquired			5
Number of stores			2,243
Subsequent Event
Subsequent Event [Line Items]
Purchase price \| $	$ 580,000,000	$ 36,100,000
Number of stores acquired	92	48
Number of stores	2,300
Subsequent Event \| Nebraska
Subsequent Event [Line Items]
Number of stores acquired	24
Subsequent Event \| Illinois
Subsequent Event [Line Items]
Number of stores acquired	56
Subsequent Event \| Iowa
Subsequent Event [Line Items]
Number of stores acquired	5
Subsequent Event \| Missouri
Subsequent Event [Line Items]
Number of stores acquired	3
Subsequent Event \| Texas
Subsequent Event [Line Items]
Number of stores acquired	4
Subsequent Event \| Fuel Supply Agreements
Subsequent Event [Line Items]
Number of stores acquired	81
Subsequent Event \| Line of Credit \| Unsecured Revolving Credit Facility Due January 2026
Subsequent Event [Line Items]
Maximum borrowing capacity \| $	$ 300,000,000
Facility fee percentage repaid quarterly	1.25%

Uncategorized Items - casy-2021

Label	Element	Value
Accounting Standards Update [Extensible List]	us-gaap_AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201409Member