Casey's General Stores (CASY) 10-K/A 10 Dec 14 2014 FY Annual report (amended) Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Apr. 30, 2014	Jun. 23, 2014	Oct. 31, 2013
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'Caseys General Stores Inc,	'	'
Document Type	'10-K	'	'
Current Fiscal Year End Date	'--04-30	'	'
Entity Common Stock, Shares Outstanding	'	37,882,157	'
Entity Public Float	'	'	$2,600,000,000
Amendment Flag	'true	'	'
Amendment Description	'EXPLANATORY NOTECasey's General Stores, Inc. (the "Company") is filing this Amendment No. 1 on Form 10-K/A to its Annual Report on Form 10-K for the fiscal year ended April 30, 2014, originally filed with the Securities and Exchange Commission (SEC) on June 27, 2014 (the "Original Filing"), to make the following changes: 1.To amend Item 1A. Risk Factors to add an additional risk factor regarding the potential adverse impact the material weakness could have on our timely reporting of financial results, investor confidence, and stock price.2.To amend Item 8. Financial Statements, Report of Independent Registered Public Accounting Firm, in relation to the independent registered public accounting firm's report on our internal control over financial reporting; and3.To make revisions for immaterial errors in the consolidated financial statements for the three-year period ended April 30, 2014 previously issued in the Original Filing in Item 1. Business, Item 6. Selected Financial Data, and Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.4.To amend Item 9A. Controls and Procedures related to the effectiveness of our disclosure controls and procedures and internal control over financial reporting;In the second quarter of fiscal year 2015, through a routine Internal Revenue Service (IRS) examination, management became aware that an inadvertent accounting and reporting error occurred during the fiscal years 2012, 2013, and 2014 and the first quarter of fiscal year 2015. A control deficiency was identified with regards to the review and approval of quarterly federal excise tax returns by management with the requisite skill and knowledge, and recognition of the corresponding liability and expense. The internal controls in place during this time were not responsive to changes in circumstances. While the control deficiency did not result in a material misstatement to the Company's consolidated financial statements for any periods through and including the fiscal year ended April 30, 2014, or unaudited condensed consolidated financial statements for the first fiscal quarter of fiscal year 2015, it did represent a material weakness as of April 30, 2014, since there existed a reasonable possibility that a material misstatement of the Company's annual or interim financial statements would not be prevented or detected on a timely basis. The correction of these immaterial errors is being recognized in revisions to our consolidated financial statements for the fiscal year ended April 30, 2014 in this Amendment No. 1 and in revisions to the unaudited condensed consolidated financial statements for the fiscal quarter ended July 31, 2014, included on Form 10-Q/A dated December 9, 2014 to be filed concurrently with this Form 10K/A.Pursuant to Rule 12b-15 under the Securities Exchange act of 1934, as a result of this Amendment No. 1, the certifications pursuant to Rules 13a-14(a)/15(d)-14(a) under the Securities Exchange Act of 1934, as amended and Section 906 of the Sarbanes-Oxley Act of 2002 have been re-executed and refiled as of the date of this Amendment No. 1. As a result, the Exhibit Index in Part IV; Item 15 of the Annual Report is also being amended to reflect the inclusion of the aforementioned updates. Accordingly, we hereby amend Items 1, 1A, 6, 7, 8, 9A, and 15 in the Original Filing. Except as described in this Explanatory Note, the Original Filing is unchanged. In particular, except for the events described above, this Amendment No. 1 speaks only as of the date the Original Filing was filed, and has not been updated, amended, or supplemented to give effect to any subsequent events. Accordingly, forward-looking statements included in this Amendment No. 1 represent management's views as of the date the Original Filing was filed and should not be assumed to be accurate as of any date thereafter. This Amendment No. 1 should be read in conjunction with the Original Filing, and any of Company's other filings with the SEC subsequent to the Original Filing, together with any amendments to those filings.	'	'
Entity Central Index Key	'0000726958	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Document Period End Date	30-Apr-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Apr. 30, 2014	Apr. 30, 2013
In Thousands, unless otherwise specified
Cash and cash equivalents	$121,641	$41,271
Receivables	25,841	20,900
Inventories	204,833	189,514
Prepaid expenses	1,478	1,396
Deferred income taxes	23,292	16,066
Income taxes receivable	12,473	9,820
Total current assets	389,558	278,967
Land	490,005	431,523
Buildings and leasehold improvements	1,004,263	904,732
Machinery and equipment	1,330,697	1,182,470
Leasehold interest in property and equipment	16,278	15,486
	2,841,243	2,534,211
Less accumulated depreciation and amortization	1,062,278	952,286
Net property and equipment	1,778,965	1,581,925
Other assets, net of amortization	15,947	14,485
Goodwill	120,406	114,791
Total assets	2,304,876	1,990,168
Notes payable to bank	'	59,100
Current maturities of long-term debt	553	15,810
Accounts payable	250,807	232,913
Wages and related taxes	27,411	16,221
Insurance	28,429	24,039
Other	61,117	44,494
Total current liabilities	390,889	412,806
Long-term debt, net of current maturities	853,642	653,081
Deferred income taxes	318,023	293,708
Deferred compensation	16,558	15,787
Other long-term liabilities	22,500	21,399
Total liabilities	1,601,612	1,396,781
Preferred stock, no par value, none issued	0	0
Common stock, no par value, 38,507,387 and 38,352,509 shares issued and outstanding at April 30, 2014 and 2013, respectively	33,878	23,119
Retained earnings	669,386	570,268
Total shareholders' equity	703,264	593,387
Total liabilities and shareholders' equity	2,304,876	1,990,168
Property Taxes [Member]	'	'
Property taxes	$22,572	$20,229

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Apr. 30, 2014	Apr. 30, 2013
Preferred stock, shares issued	0	0
Preferred stock,par value (in Dollars per share)	$0	$0
Common stock, par value (in Dollars per share)	$0	$0
Common stock,shares issued	38,507,387	38,352,509
Common stock,shares outstanding	38,507,387	38,352,509

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014		Apr. 30, 2013		Apr. 30, 2012
Total revenue	$7,840,255		$7,250,840		$6,987,804
Cost of goods sold (exclusive of depreciation and amortization, shown separately below)	6,618,239		6,179,771		5,987,659
Gross profit	1,222,016	[1]	1,071,069	[1]	1,000,145	[1]
Operating expenses	857,297		760,365		688,431
Depreciation and amortization	131,160		111,823		96,552
Interest, net	39,915		35,265		35,192
Income before income taxes	193,644		163,616		179,970
Federal and state income taxes	66,824		59,802		65,276
Net income	$126,820		$103,814		$114,694
Net income per common share	'		'		'
Basic (in Dollars per share)	$3.30		$2.71		$3.01
Diluted (in Dollars per share)	$3.26		$2.69		$2.99
[1]	Gross profit is given before charge for depreciation and amortization and credit card fees. Fiscal 2012 quarterly data was included for comparative purposes and to describe the impact of the immaterial error on Q3 and Q4 of 2012 as discussed in footnote 2, Correction of Immaterial Errors.

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (USD $)	Common Stock [Member]	Retained Earnings [Member]	Total
In Thousands
Balance at April 30 at Apr. 30, 2011	$3,996	$399,900	$403,896
Net income	'	114,694	114,694
Dividends declared	'	-22,849	-22,849
Proceeds from exercise of stock options	3,249	'	3,249
Tax benefits related to nonqualified stock options	1,162	'	1,162
Stock based compensation	3,792	'	3,792
Balance at April 30 at Apr. 30, 2012	12,199	491,745	503,944
Net income	'	103,814	103,814
Dividends declared	'	-25,291	-25,291
Proceeds from exercise of stock options	4,721	'	4,721
Tax benefits related to nonqualified stock options	1,929	'	1,929
Stock based compensation	4,270	'	4,270
Balance at April 30 at Apr. 30, 2013	23,119	570,268	593,387
Net income	'	126,820	126,820
Dividends declared	'	-27,702	-27,702
Proceeds from exercise of stock options	3,368	'	3,368
Tax benefits related to nonqualified stock options	1,791	'	1,791
Stock based compensation	5,600	'	5,600
Balance at April 30 at Apr. 30, 2014	$33,878	$669,386	$703,264

Consolidated_Statements_of_Sha1

Consolidated Statements of Shareholders' Equity (Parentheticals) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Payment of dividends per share	$0.72	$0.66	$0.60
Exercise of stock options,shares	140,785	198,200	159,600

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Cash flows from operating activities	'	'	'
Net income	$126,820	$103,814	$114,694
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	131,160	111,823	96,552
Other amortization	297	195	347
Stock-based compensation	5,600	4,270	3,792
Loss on disposal of assets and impairment charges	2,846	4,788	1,428
Deferred income taxes	17,089	31,828	53,141
Excess tax benefits related to stock option exercises	-1,791	-1,929	-1,162
Changes in assets and liabilities:	'	'	'
Receivables	-4,941	800	-1,546
Inventories	-13,696	-16,222	-8,647
Prepaid expenses	-82	-98	-118
Accounts payable	17,894	21,748	-4,510
Accrued expenses	33,818	15,783	10,944
Income taxes receivable	-441	9,969	29,508
Other, net	-413	-441	456
Net cash provided by operating activities	314,160	286,328	294,879
Cash flows from investing activities	'	'	'
Purchase of property and equipment	-308,633	-305,301	-240,874
Payments for acquisitions of businesses, net of cash acquired	-31,584	-29,527	-39,444
Proceeds from sales of property and equipment	3,328	3,544	2,196
Net cash used in investing activities	-336,889	-331,284	-278,122
Cash flows from financing activities	'	'	'
Proceeds from long-term debt	200,000	0	0
Repayments of long-term debt	-15,865	-10,757	-1,372
Net (repayments) borrowings of short-term debt	-59,100	59,100	-600
Proceeds from exercise of stock options	3,368	4,721	3,249
Payments of cash dividends	-27,095	-24,685	-22,849
Excess tax benefits related to stock option exercises	1,791	1,929	1,162
Net cash provided by (used in) financing activities	103,099	30,308	-20,410
Net increase (decrease) in cash and cash equivalents	80,370	-14,648	-3,653
Cash and cash equivalents at beginning of year	41,271	55,919	59,572
Cash and cash equivalents at end of year	121,641	41,271	55,919
Cash paid (received) during the year for	'	'	'
Interest, net of amount capitalized	36,923	35,226	35,403
Income taxes	50,031	17,973	-17,973
Noncash investing and financing activities	'	'	'
Property and equipment acquired through notes payable and capitalized lease obligations	$1,169	$981	$191

Note_1_Significant_Accounting_

Note 1 - Significant Accounting Policies	12 Months Ended
	Apr. 30, 2014
Accounting Policies [Abstract]	'
Significant Accounting Policies [Text Block]	'
	1.     SIGNIFICANT ACCOUNTING POLICIES
	Operations      Casey’s General Stores, Inc. and its subsidiaries (the Company/Casey’s) operate 1,808 convenience stores in 14 Midwest states. The stores are located primarily in smaller communities, many with populations of less than 5,000. Retail sales in 2014 were distributed as follows: 71% fuel, 20% grocery & other merchandise, and 9% prepared food & fountain. The Company’s products are readily available, and the Company is not dependent on a single supplier or only a few suppliers.
	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 requires management to make estimates and assumptions that affect 1) the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and 2) 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.
	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 for financial and income tax reporting applied to inventory values determined primarily by our FIFO accounting system for warehouse inventories.
	The excess of current cost over the stated LIFO value was $48,777 and $44,792 at April 30, 2014 and 2013, respectively. There were no material LIFO liquidations during the periods presented.      Below is a summary of the inventory values at April 30, 2014 and 2013:
		Fiscal 2014		Fiscal 2013
	Fuel	$	95,004	$	87,262
	Merchandise		109,829		102,252
	Total inventory	$	204,833	$	189,514
	Vendor allowances include rebates and other funds received from vendors to promote their products. The Company often receives such allowances on the basis of quantitative contract terms that vary by product and vendor or directly on the basis of purchases made. Vendor rebates in the form of rack display allowances (RDAs) are funds that we receive from various vendors for allocating certain shelf space to carry their specific products or to introduce new products in our stores for a particular period of time. The RDAs are treated as a reduction in cost of goods sold and are recognized ratably over the period covered by the applicable rebate agreement. These funds do not represent reimbursements of specific, incremental, identifiable costs incurred by us in selling the vendor’s products. Vendor rebates in the form of billbacks are treated as a reduction in cost of goods sold and are recognized at the time the product is sold. Reimbursements of an operating expense (e.g., advertising) are recorded as reductions of the related expense.
	Renewable Identification Numbers (RINs) are recorded as a reduction in cost of goods sold in the period when the Company commits to a price and agrees to sell all of the RINs earned during a specified period. The Company includes in cost of goods sold the costs we incur to acquire fuel and merchandise, including excise taxes, less vendor allowances and rebates and RINs.
	Goodwill Goodwill and intangible assets with indefinite lives are tested for impairment at least annually. The Company assesses impairment annually at year-end using a market based approach to establish fair value. All of the goodwill assigned to the individual stores is aggregated into a single reporting unit due to the similar economic characteristics of the stores. As of April 30, 2014, there was $120,406 of goodwill and management’s analysis of recoverability completed as of the fiscal year-end yielded no evidence of impairment.
	Store closings and asset impairment The Company writes down property and equipment of stores it is closing to estimated net realizable value at the time management commits to a plan to close such stores and begins active marketing of the stores. The Company bases the estimated net realizable value of property and equipment on its experience in utilizing and/or disposing of similar assets and on estimates provided by its own and/or third-party real estate experts.
	The Company monitors closed and underperforming stores for an indication that the carrying amount of assets may not be recoverable. If the sum of the expected future undiscounted cash flows is less than the carrying amount of the assets, an impairment loss is recognized to the extent carrying value of the assets exceeds their estimated fair value. Fair value is based on management’s estimate of the price that would be received to sell an asset in an orderly transaction between market participants. The estimate is derived from offers, actual sale or disposition of assets subsequent to year-end, and other indications of fair value, which are considered Level 3 inputs. 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 $2,542 in fiscal 2014, $3,680 in fiscal 2013, and $226 in fiscal 2012. Impairment charges are a component of operating expenses.
	Depreciation and amortization Depreciation of property and equipment and amortization of capital lease assets are computed principally by the straight-line method over the following estimated useful lives:
	Buildings	25-40 years
	Machinery and equipment	5-30 years
	Leasehold interest in property and equipment	Lesser of term of lease or life of asset
	Leasehold improvements	Lesser of term of lease or life of asset
	The Company monitors stores and will accelerate depreciation if the expected life of the asset is reduced due to the operation of the store or the Company’s plans.
	Excise taxes Excise taxes approximating $646,000, $596,000, and $527,000 on retail fuel sales are included in total revenue and cost of goods sold for fiscal 2014, 2013, and 2012, 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 & other merchandise, prepared food & fountain, and commissions on lottery, prepaid phone cards, and video rentals at the time of the sale to the customer. Sales taxes collected from customers and remitted to the government are recorded on a net basis in the consolidated financial statements.
	Net income per common share      Basic earnings per share have been computed by dividing net income by the weighted average shares outstanding during each of the years. The calculation of diluted earnings per share treats stock options and restricted stock units outstanding as potential common shares to the extent they are dilutive.
	Asset retirement obligations The Company recognizes the estimated future cost to remove underground storage tanks over the estimated useful life of the storage tank. The Company records a discounted liability for the fair value of an asset retirement obligation with a corresponding increase to the carrying value of the related long-lived asset at the time an underground storage tank is installed. The Company amortizes the amount added to other assets and recognizes accretion expense in connection with the discounted liability over the remaining life of the tank. The estimates of the anticipated future costs for removal of an underground storage tank are based on our prior experience with removal. Because these estimates are subjective and are currently based on historical costs with adjustments for estimated future changes in the associated costs, we expect the dollar amount of these obligations to change as more information is obtained.
	There were no material changes in our asset retirement obligation estimates during fiscal 2014. The recorded asset for asset retirement obligations was $8,391 and $8,011 at April 30, 2014 and 2013, respectively, and is recorded in other assets, net of amortization. The discounted liability was $12,854 and $12,176 at April 30, 2014 and 2013, respectively, and is recorded in other long-term liabilities.
	Self-insurance      The Company is primarily self-insured for workers' compensation, general liability, and automobile claims. The self-insurance claim liability 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 high degree of variability in the liability estimates. Some factors affecting the uncertainty of claims include the development time frame, settlement patterns, litigation and adjudication direction, and medical treatment and cost trends. The liability is not discounted. The balance of our self-insurance reserves were $28,429 and $24,039 for the years ended April 30, 2014 and 2013, respectively.
	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, 2014, 2013, or 2012. However, we do from time to time, participate in a forward buy of certain commodities, primarily cheese and coffee. These are not accounted for as derivatives under the normal purchase and normal sale exclusions under the applicable guidance.
	Stock-based compensation Stock-based compensation is recorded based upon the fair value of the award on the grant date. The cost of the award is recognized ratably in the statement of income over the vesting period of the award.
	Segment reporting As of April 30, 2014, we operated 1,808 stores in 14 states. Our stores offer a broad selection of merchandise, fuel and other products and services designed to appeal to the convenience needs of our customers. We manage the business on the basis of one operating segment and therefore, have only one reportable segment. Our stores sell similar products and services, use similar processes to sell those products and services, and sell their products and services to similar classes of customers. We make specific disclosures concerning the three broad merchandise categories of fuel, grocery & other merchandise, and prepared food and fountain because it makes it easier for us to discuss trends and operational initiatives within our business and industry. Although we can separate gross margins 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 April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity”, to clarify the definition of discontinued operations, limiting it to disposals of components that represent a strategic shift that has or will have a major effect on operations and financial results. Examples of a strategic shift include disposals of a major geographic area, a major line of business, or a major equity method investment. The standard is effective prospectively for disposals that occur within annual periods beginning on or after December 15, 2014, and interim periods within those annual periods. It will be adopted by the Company May 1, 2015. Early application is permitted in specific instances. We are currently evaluating the impact of adoption on our financial statements, however, we do not expect it to have a material impact on our consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard is effective for the Company on May 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

Note_2_Correction_of_Immateria

Note 2 - Correction of Immaterial Errors	12 Months Ended
	Apr. 30, 2014
Accounting Changes and Error Corrections [Abstract]	'
Accounting Changes and Error Corrections [Text Block]	'
	2. CORRECTION OF IMMATERIAL ERRORS
	Subsequent to the year ended April 30, 2014, through a routine IRS examination, the Company identified errors in excise taxes owed on ethanol gallon purchases, that resulted in an understatement of accrued expenses at April 30, 2014 and 2013 and cost of goods sold for the fiscal years ended 2014, 2013 and 2012. The excise tax liability is subject to interest charges and is deductible for income tax purposes. In accordance with the SEC’s Staff Accounting Bulletin (SAB) No. 99, Materiality, and SAB No. 108, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Consolidated Statements of Income, Balance Sheets, Shareholders Equity and Cash Flows, management evaluated the materiality of the errors from qualitative and quantitative perspectives and concluded that the errors were immaterial to the Company’s historical financial statements. Consequently, the Company has revised its historical financial statements for the fiscal year ended April 30, 2014 as noted in the tables below.
	Statement of Income Data
		Year ended April 30,
		2014				2013				2012
		As		As		As		As		As		As
		Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
		Reported				Reported				Reported
	Cost of goods sold	$	6,605,996	$	6,618,239	$	6,168,475	$	6,179,771	$	5,984,114	$	5,987,659
	Interest, net		39,270		39,915		35,048		35,265		35,192		35,192
	Federal and state income taxes		72,018		66,824		64,504		59,802		66,724		65,276
	Net income		134,514		126,820		110,625		103,814		116,791		114,694
	Net income per common share
	Basic	$	3.5	$	3.3	$	2.89	$	2.71	$	3.07	$	3.01
	Diluted	$	3.46	$	3.26	$	2.86	$	2.69	$	3.04	$	2.99
	Balance Sheet Data
		As of April 30,
		2014				2013
		As		As		As		As
		Previously		Adjusted		Previously		Adjusted
		Reported				Reported
	Deferred income taxes (asset)	$	11,878	$	23,292	$	9,916	$	16,066
	Accrued expenses other		33,171		61,117		29,436		44,494
	Deferred income taxes (liability)		317,953		318,023		293,708		293,708
	Retained earnings		685,988		669,386		579,176		570,268
	Total shareholders’ equity		719,866		703,264		602,295		593,387
	Statement of Cash Flow Data
		Years ended April 30,
		2014				2013				2012
		As		As		As		As		As		As
		Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
		Reported				Reported				Reported
	Net income	$	134,514	$	126,820	$	110,625	$	103,814	$	116,791	$	114,694
	Deferred income taxes		22,283		17,089		36,530		31,828		54,589		53,141
	Accrued expenses		20,930		33,818		4,270		15,783		7,399		10,944
	In addition, the quarterly condensed consolidated financial statements have been revised as set forth below:
	Statement of Income Data (unaudited)
		Three months				Three months				Six months
		ended 7/31/13				ended 10/31/13				ended 10/31/13
		As		As		As		As		As		As
		Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
		reported				reported				reported
	Cost of goods sold	$	1,769,239		1,772,328	$	1,693,584		1,696,600	$	3,462,823		3,468,928
	Interest, net		9,456		9,576		9,748		9,896		19,204		19,472
	Federal and state income taxes		33,869		32,575		22,289		21,014		56,158		53,589
	Net income		55,710		53,795		41,319		39,430		97,029		93,225
	Net income per
	Basic	$	1.45		1.4	$	1.07		1.03	$	2.53		2.43
	Diluted	$	1.43		1.39	$	1.06		1.01	$	2.5		2.4
	Statement of Income Data(unaudited)cont.
		Three months				Nine months
		ended 1/31/14				ended 1/31/14
		As		As		As		As
		Previously		Adjusted		Previously		Adjusted
		reported				reported
	Cost of goods sold	$	1,510,182		1,513,365	$	4,973,005		4,982,293
	Interest, net		9,947		10,123		29,151		29,595
	Federal and state income taxes		7,899		6,556		64,057		60,145
	Net income		14,669		12,653		111,698		105,878
	Net income per
	Basic	$	0.38		0.33	$	2.91		2.76
	Diluted	$	0.38		0.33	$	2.87		2.73
	Statement of Cash Flow Data (unaudited)
	Three months				Six months				Nine months
	ended 7/31/13				ended 10/31/13				ended 1/31/14
	As		As		As		As		As		As
	Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
	reported				reported				reported
Net income	$	55,710		53,795	$	97,029		93,225	$	111,698		105,878
Deferred income taxes		3,122		1,828		11,202		8,633		14,030		10,118
Accrued expenses		20,005		23,214		12,904		19,277		18,933		28,665
In addition, the following notes to the condensed consolidated financial statements have been affected by the revisions for the correction of these immaterial errors: Footnotes 3, 6, 7 and 13.

Note_3_Acquisitions

Note 3 - Acquisitions	12 Months Ended
	Apr. 30, 2014
Business Combinations [Abstract]	'
Business Combination Disclosure [Text Block]	'
	3.     ACQUISITIONS
	Due to the immaterial error discussed in this Amendment No. 1, amounts in this footnote have been revised. For further discussion of the revision, see footnote 2, Correction of Immaterial Errors.
	During the year ended April 30, 2014, the Company acquired 28 stores through a variety of single store and multi-store transactions with several unrelated third parties. Of the 28 stores acquired, 25 were opened during the 2014 fiscal year, one was closed permanently and two will be opened during the 2015 fiscal year. The acquisitions meet the criteria to be considered business combinations. 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. 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. All of the goodwill associated with these transactions will be deductible for income tax purposes over 15 years.
	Allocation of the purchase price for the transactions in aggregate is as follows (in thousands):
	Assets acquired:
	Inventories	$	1,622
	Property and equipment		24,469
	Total assets		26,091
	Liabilities assumed:
	Accrued expenses		122
	Total liabilities		122
	Net tangible assets acquired		25,969
	Goodwill		5,615
	Total consideration paid	$	31,584
	The allocation of the purchase price to assets acquired and liabilities assumed for any acquisition is preliminary pending finalization of management’s analysis.
	The following unaudited pro forma information presents a summary of our consolidated results of operations as if the transactions referenced above occurred at the beginning of the first fiscal year of the periods presented (amounts in thousands, except per share data):
		Years Ended April 30,
		2014		2013
	Total revenue	$	7,885,634	$	7,362,816
	Net income	$	127,615	$	105,699
	Net income per common share
	Basic	$	3.32	$	2.76
	Diluted	$	3.28	$	2.73

Note_4_Fair_Value_of_Financial

Note 4 - Fair Value of Financial Instruments and Long Term Debt	12 Months Ended
	Apr. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures [Text Block]	'
	4.     FAIR VALUE OF FINANCIAL INSTRUMENTS AND LONG-TERM DEBT
	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 The fair value of the Company’s long-term debt and capital lease obligations 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 $841,000 and $721,000, respectively, at April 30, 2014 and 2013.
	The Company’s long-term debt at carrying amount by issuance is as follows:
		As of April 30,
		2014		2013
	Capitalized lease obligations discounted at 5.22% to 7.09% due in various monthly installments through 2048 (Note 8)	$	10,195		9,891
	5.72% Senior notes due in 14 installments beginning September 30, 2012 and ending March 30, 2020		75,000		90,000
	5.22% Senior notes due August 9, 2020		569,000		569,000
	3.67% Senior notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028		150,000		—
	3.75% Senior notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028		50,000		—
			854,195		668,891
	Less current maturities		553		15,810
		$	853,642		653,081
	At April 30, 2014, the Company had a bank line of credit arrangement consisting of two Promissory Notes, in the principal amount of $50,000 each (together, the “Notes”). The Notes evidenced a revolving line of credit in the aggregate principal amount of $100,000 and bear interest at variable rates subject to change from time to time based on changes in an independent index referred to in the Notes as the Federal Funds Offered Rate (the “Index”). On December 17, 2013 the Company cancelled a $25,000 Promissory Note that was part of its line of credit. The interest rate to be applied to the unpaid principal balance of the first Note was at a rate of 0.750% over the Index. The interest rate applicable to the second note is 1.000% over the Index. There was a $0 balance at April 30, 2014 and a $59,100 balance owed at April 30, 2013
	Interest expense is net of interest income of $214, $211, and $208 for the years ended April 30, 2014, 2013, and 2012, respectively. Interest expense is also net of interest capitalized of $1,177, $894, and $674 during the years ended April 30, 2014, 2013, and 2012, respectively.
	The agreements relating to the above long-term debt contain certain operating and financial covenants. At April 30, 2014, the Company was in compliance with all such covenants. Listed below are the aggregate maturities of long-term debt, including capitalized lease obligations, for the 5 years commencing May 1, 2014 and thereafter:
	Years ended April 30,	Capital Leases		Senior Notes		Total
	2015	$	553		—		553
	2016		398		15,000		15,398
	2017		375		15,000		15,375
	2018		396		15,000		15,396
	2019		417		15,000		15,417
	Thereafter		8,056		784,000		792,056
		$	10,195		844,000	$	854,195

Note_5_Preferred_and_Common_St

Note 5 - Preferred and Common Stock	12 Months Ended
	Apr. 30, 2014
Preferred And Common Stock [Abstract]	'
Preferred And Common Stock [Text Block]	'
	5	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 option plans The 2009 Stock Incentive Plan (the “Plan”), was approved by the Board of Directors in June 2009 and approved by the shareholders in September 2009. The Plan replaced the 2000 Option Plan and the Non-employee Director Stock Plan (together, the “Prior Plans”). There are 4,153,608 shares available for grant at April 30, 2014 under the Plan. Awards made under the Plan may take the form of stock options, restricted stock or restricted stock units. Each share issued pursuant to a stock option will reduce the shares available for grant by one, and each share issued pursuant to an award of restricted stock or restricted stock units will reduce the shares available for grant by two. We account for stock-based compensation by estimating the fair value of stock options granted under the Plan using market price of a share of our common stock on the date of grant. We recognize this fair value as an operating expense in our consolidated statements of income over the requisite service period using the straight-line method. Additional information regarding the Plan is provided in the Company’s 2009 Proxy Statement. At April 30, 2014, options for 712,024 shares (which expire between 2015 and 2021) were outstanding. All stock option shares issued are previously unissued authorized shares.
	On June 10, 2011, restricted stock units with respect to a total of 9,198 shares were granted to certain employees under the annual incentive compensation program. The fair value of the Company’s shares on the date of grant was $40.49. These awards vested on May 1, 2014 and compensation expense was recognized ratably over the vesting period. This award was granted at no cost to the employee.
	On June 23, 2011, stock options totaling 441,000 shares were granted to certain officers and key employees. These awards vested on June 23, 2014, and compensation expense was recognized ratably over the vesting period. This award was granted at no cost to the employee.
	On June 23, 2011, restricted stock units totaling 15,000 shares were granted to the CEO. The fair value of the Company’s shares on the date of grant was $44.39. This award was granted at no cost to the employee. This award vested on June 23, 2014 and compensation expense was recognized ratably over the vesting period.
	On September 16, 2011, restricted stock units with respect to a total of 14,000 shares were granted to the non-employee members of the Board. The fair value of the Company’s shares on the date of grant was $47.59. This award was also granted at no cost to the non-employee members of the Board. This award vested on May 1, 2012 and compensation expense was recognized ratably over the vesting period.
	On June 8, 2012, restricted stock units with respect to a total of 32,998 shares were granted to certain employees under the annual incentive compensation program. The fair value of the Company’s shares on the date of grant was $59.48. These awards will vest on June 8, 2015 and compensation expense is being recognized ratably over the vesting period. This award was granted at no cost to the grantee.
	On September 14, 2012, restricted stock units with respect to a total of 14,000 shares were granted to the non-employee members of the Board. The fair value of the Company’s shares on the date of grant was $58.93. This award was granted at no cost to the non-employee members of the Board. This award vested on May 1, 2013 and compensation expense was recognized ratably over the vesting period.
	On June 7, 2013 and June 19, 2013 restricted stock units with respect to a total of 77,650 shares were granted to certain officers and key employees. The fair value of the Company’s shares was $62.26 on June 7, 2013 (76,150 shares) and $60.47 on June 19, 2013 (1,500 shares). These awards were granted at no cost to the grantee. These awards will vest on June 7, 2016 and compensation expense is currently being recognized ratably over the vesting period.
	On September 13, 2013, restricted stock units totaling 14,000 shares were granted to the non-employee members of the Board. The fair value of the Company’s shares on the date of grant was $71.02. This award was granted at no cost to the non-employee members of the Board. This award vested on May 1, 2014 and compensation expense was recognized ratably over the vesting period.
	The 2000 Stock Option Plan allowed the grant of options with an exercise price equal to the fair value of the Company’s stock on the date of grant that expired ten years after the date of grant. Vesting was generally over a three to five-year service period. The Non-employee Directors’ Stock Option Plan allowed the grant of options with an exercise price equal to the average of the last reported sale prices of shares of common stock on the last trading day of each of the twelve months preceding the award of the option. The term of such options was ten years from the date of grant, and each option is exercisable immediately upon grant. The aggregate number of shares of Common Stock that could have been granted pursuant to the Director Stock Plan was 200,000 shares, subject to adjustment to reflect any future stock dividends, stock splits, or other relevant capitalization changes. Shares issued as restricted stock units become unrestricted shares of common stock at the end of the vesting period.
	Information concerning the issuance of stock options under the Plan and Prior Plans is presented in the following table:
			Number of				Weighted
			option shares				average option
							exercise price
	Outstanding at April 30, 2011			775,109			$	23.38
	Granted			441,000				44.39
	Exercised			(159,600	)			20.36
	Forfeited			(3,000	)			36.19
	Outstanding at April 30, 2012			1,053,509			$	32.59
	Granted			-				-
	Exercised			(198,200	)			23.82
	Forfeited			(500	)			14.08
	Outstanding at April 30, 2013			854,809			$	34.64
	Granted			-				-
	Exercised			(140,785	)			23.93
	Forfeited			(2,000	)			44.39
	Outstanding at April 30, 2014			712,024			$	36.73
	Information concerning the issuance of restricted stock units under the Plan is presented in the following table:
	Unvested at April 30, 2011			14,000
	Granted			38,198
	Vested			(14,000	)
	Forfeited			-
	Unvested at April 30, 2012			38,198
	Granted			46,998
	Vested			(14,000	)
	Forfeited			-
	Unvested at April 30, 2013			71,196
	Granted			91,650
	Vested			(14,150	)
	Forfeited			(150	)
	Unvested at April 30, 2014			148,546
	At April 30, 2014, all outstanding options had an aggregate intrinsic value of $22,737 and a weighted average remaining contractual life of 6 years. The vested options totaled 284,024 shares with a weighted average exercise price of $25.18 per share and a weighted average remaining contractual life of 4.4 years. The aggregate intrinsic value for the vested options as of April 30, 2014 was $12,349. The aggregate intrinsic value for the total of all options exercised during the year ended April 30, 2014 was $2,952, and there were no shares that vested during the year ended April 30, 2014.
	The grant date fair value for the June 23, 2011 options were $14.65, which was estimated utilizing the Black Scholes valuation model. The significant assumptions included:
	Risk-free interest rate			2.14%
	Expected option life (years)			6.11
	Expected volatility			37%
	Expected dividend yield			1.58%
	Total compensation costs recorded for the years ended April 30, 2014, 2013 and 2012 were $5,600, $4,270, and $3,792, respectively, for the stock option and restricted stock unit awards. As of April 30, 2014, there was $325 of total unrecognized compensation costs related to the Plan and Prior Plans for stock options that are expected to be recognized ratably through 2015, and $4,036 of unrecognized compensation costs related to restricted stock units which are expected to be recognized ratably through fiscal 2017.
	At April 30, 2014, the range of exercise prices for outstanding options was $17.64 – $44.39 and the weighted average remaining contractual life of outstanding options was 6 years. The number of shares and weighted average remaining contractual life of the options by range of applicable exercise prices at April 30, 2014 were as follows:
		Range of				Number			Weighted average		Weighted average remaining
		exercise prices				of shares			exercise price		contractual life (years)
		$	17.64				6,000			17.64		1
			20.68 – 26.92				278,024			25.34		4.4
			44.39				428,000			44.39		7.2
							712,024

Note_6_Net_Income_Per_Common_S

Note 6 - Net Income Per Common Share	12 Months Ended
	Apr. 30, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	6.     NET INCOME PER COMMON SHARE
	Due to the immaterial error discussed in this Amendment No. 1, amounts in this footnote have been revised. For further discussion of the revision, see footnote 2, Correction of Immaterial Errors.
	Computations for basic and diluted earnings per common share are presented below:
		Years ended April 30,
		2014		2013		2012
	Basic
	Net income	$	126,820	$	103,814	$	114,694
	Weighted average shares outstanding-basic		38,457,680		38,297,083		38,068,001
	Basic earnings per common share	$	3.3	$	2.71	$	3.01
	Diluted
	Net income	$	126,820	$	103,814	$	114,694
	Weighted-average shares outstanding-basic		38,457,680		38,297,083		38,068,001
	Plus effect of stock options and restricted stock units		410,726		322,993		323,703
	Weighted-average shares outstanding-diluted		38,868,406		38,620,076		38,391,704
	Diluted earnings per common share	$	3.26	$	2.69	$	2.99
	Options to purchase shares of common stock that were not included in the computation of diluted earnings per share, because their inclusion would have been antidilutive, were 439,000 for fiscal 2012. All options were included for fiscal 2014 and fiscal 2013.

Note_7_Income_Taxes

Note 7 - Income Taxes	12 Months Ended
	Apr. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	7.     INCOME TAXES
	Due to the immaterial error discussed in this Amendment No. 1, amounts in this footnote have been revised. For further discussion of the revision, see footnote 2, Correction of Immaterial Errors.
	Income tax expense attributable to earnings consisted of the following components:
		Years ended April 30,
		2014			2013			2012
	Current tax expense
	Federal	$	44,078		$	23,519		$	9,937
	State		5,657			4,455			2,345
			49,735			27,974			12,282
	Deferred tax expense		17,089			31,828			52,994
	Total income tax provision	$	66,824		$	59,802		$	65,276
	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,
		2014			2013
	Deferred tax assets
	Accrued liabilities	$	23,292		$	16,066
	Deferred compensation		6,272			6,050
	Equity compensation		3,598			916
	Unrecognized tax benefits		3,113			3,128
	State net operating losses and tax credits		2,757			3,902
	Other		98			100
	Total gross deferred tax assets		39,130			30,162
	Less valuation allowance		—			—
	Total net deferred tax assets		39,130			30,162
	Deferred tax liabilities
	Property and equipment depreciation		(318,565	)		(295,951	)
	Goodwill		(14,989	)		(11,919	)
	Other		(307	)		66
	Total gross deferred tax liabilities		(333,861	)		(307,804	)
	Net deferred tax liability	$	(294,731	)	$	(277,642	)
	At April 30, 2014, the Company had net operating loss carryforwards for state income tax purposes of approximately $71,471, which are available to offset future state taxable income. These net operating loss carryforwards expire during the years 2017 through 2033. In addition, the Company had state alternative minimum tax credit carryforwards of approximately $129, which are available to reduce future state regular income taxes over an indefinite period.
	There was no valuation allowance recorded for deferred tax assets as of April 30, 2014 and 2013. 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. Out of period adjustments of $2,760 were recorded in fiscal 2014.
		Years ended April 30,
		2014			2013			2012
	Income taxes at the statutory rates		35.00%			35.00%			35.00%
	Federal tax credits		-2.1			-1.8			-2.2
	State income taxes, net of federal tax benefit		3.2			2.4			2.8
	Out of period adjustments		-1.4			—			—
	Other		-0.2			1			0.7
			34.50%			36.60%			36.30%
	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 $9,244 and $8,938 in gross unrecognized tax benefits at April 30, 2014 and 2013, respectively which is recorded in other long-term liabilities in the consolidated balance sheet. Of this amount, $6,131 represents the amount of unrecognized tax benefits that, if recognized, would impact our effective tax rate. Unrecognized tax benefits increased $306 during the twelve months ended April 30, 2014, due primarily to the expiration of certain statute of limitations offset by a greater increase associated with income tax filing positions for the current year.
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		2014			2013
	Beginning balance	$	8,938		$	7,538
	Additions based on tax positions related to current year		1,229			2,807
	Additions for tax positions of prior years		415			—
	Reductions for tax positions of prior years		—			(37	)
	Reductions due to lapse of applicable statute of limitations		(1,338	)		(1,370	)
	Settlements		—			—
	Ending balance	$	9,244		$	8,938
	The total net amount of accrued interest and penalties for such unrecognized tax benefits was $402 and $286 at April 30, 2014 and 2013, respectively, and is included in other long-term liabilities. Net interest and penalties included in income tax expense for the twelve month period ended April 30, 2014 was an increase in tax expense of $116 and an increase of $37 for the year ended April 30, 2013.
	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 currently has no ongoing federal or state income tax examinations. The Company does not have any outstanding litigation related to tax matters.
	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 $2,661 during the next twelve months mainly due to the expiration of certain statute of limitations. The federal statute of limitations remains open for the years 2010 and forward. Tax years 2009 and forward are subject to audit by state tax authorities depending on open statute of limitations waivers and the tax code of each state.
	In July 2013, the Financial Accounting Standards Board issued Accounting Standards Update No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists, to provide guidance on the presentation of unrecognized tax benefits. The pronouncement requires unrecognized tax benefits to be offset on the balance sheet by any same-jurisdiction net operating loss or tax credit carryforward that would be used to settle the position with a tax authority. The pronouncement is effective for fiscal years beginning after December 15, 2013 and will be adopted by the Company May 1, 2014. We do not expect it to have a material impact on our consolidated financial statements.

Note_8_Leases

Note 8 - Leases	12 Months Ended
	Apr. 30, 2014
Leases [Abstract]	'
Leases of Lessee Disclosure [Text Block]	'
	8.     LEASES
	The Company leases certain property and equipment used in its operations. Generally, the leases are for primary terms of from five to twenty years with options either to renew for additional periods or to purchase the premises and call for payment of property taxes, insurance, and maintenance by the lessee.
	The following is an analysis of the leased property under capital leases by major classes:
		Asset balances at April 30,
		2014		2013
	Real estate	$	13,668	$	12,874
	Equipment		2,610		2,612
			16,278		15,486
	Less accumulated amortization		5,202		4,900
		$	11,076	$	10,586
	Future minimum payments under the capital leases and noncancelable operating leases with initial or remaining terms of one year or more consisted of the following at April 30, 2014:
	Years ended April 30,	Capital		Operating
		leases		leases
	2015	$	1,078	$	872
	2016		904		630
	2017		868		547
	2018		870		539
	2019		876		378
	Thereafter		12,875		261
	Total minimum lease payments		17,471	$	3,227
	Less amount representing interest		7,276
	Present value of net minimum lease payments	$	10,195
	The total rent expense under operating leases was $1,424 in 2014, $1,773 in 2013, and $1,269 in 2012.

Note_9_Benefit_Plans

Note 9 - Benefit Plans	12 Months Ended
	Apr. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Compensation and Employee Benefit Plans [Text Block]	'
	9.     Benefit plans
	401(k) plan The Company provides employees with a defined contribution 401(k) plan. The 401(k) plan covers all employees who meet minimum age and service requirements. The Company contributions consist of matching amounts and are allocated based on employee contributions. Contributions to the 401(k) plan were $5,348, $4,949, and $3,681 for the years ended April 30, 2014, 2013, and 2012, respectively.
	On April 30, 2014 and 2013, 1,488,510 and 1,496,465 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 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, depending on retirement dates, 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 has accrued the deferred compensation over the term of employment. The amounts accrued at April 30, 2014 and 2013, respectively, were $5,925 and $6,457. The discount rates used were 4.4% and 4.0%, respectively, at April 30, 2014 and 2013. The amount expensed in fiscal 2014 was $93 and the Company expects to pay $625 per year for each of the next five years. Expense incurred in fiscal 2013 and fiscal 2012 was $471 and $662, respectively.
	Other postemployment benefits The Company also has deferred compensation agreements with three other individuals, one current and two former employees. The amounts accrued at April 30, 2014 and 2013 were $3,950 and $4,016, respectively. The Company expects to pay $167, $497, $497, $497 and $441 the next five years under the agreements. The expense incurred in fiscal 2014, 2013 and 2012 was $156, $438, and $563 respectively.

Note_10_Commitments

Note 10 - Commitments	12 Months Ended
	Apr. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
Commitments Disclosure [Text Block]	'
	10.     commitments
	The Company has entered into an employment agreement with its chief executive officer. The agreement provides that the officer will receive aggregate base compensation of not less than $660 per year exclusive of bonuses. The agreement also provides for certain payments in the case of death or disability of the officer. The Company also has entered into employment agreements with thirteen other key employees, providing for certain payments in the event of termination following a change of control of the Company.

Note_11_Contingencies

Note 11 - Contingencies	12 Months Ended
	Apr. 30, 2014
Loss Contingency [Abstract]	'
Contingencies Disclosure [Text Block]	'
	11.     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, 2014 and 2013 of approximately $300 and $418, 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 As previously reported, the Company was named as a defendant in four lawsuits (“hot fuel” cases) brought in the federal courts in Kansas and Missouri against a variety of fuel retailers, which were consolidated in the U.S. District Court for the District of Kansas in Kansas City, Kansas as part of the multidistrict “Motor Fuel Temperature Sales Practices Litigation”. On November 20, 2012, the Court preliminarily approved the previously-reported settlement involving the Company, which when approved in final form by the Court following notice to the Class would result in the settlement and dismissal of all claims against Casey’s in the multidistrict litigation. The preliminarily approved settlement includes, but is not limited to, a commitment on the part of the Company to “sticker” certain information on its fuel pumps and make a monetary payment (which is not considered to be material in amount) to the plaintiff class.
	From time to time we may be involved in other legal and administrative proceedings or investigations arising from the conduct of our business operations, including contractual disputes; employment or personnel 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 compensatory or exemplary 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 adverse effect on our consolidated financial position and results of operation.
	Other At April 30, 2014, the Company was partially self-insured for workers’ compensation claims in all fourteen states of its marketing territory and 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 approximately $1,000. To facilitate this agreement, letters of credit approximating $15,000 and $15,500, respectively, were issued and outstanding at April 30, 2014 and 2013, on the insurance company’s behalf. The Company also has investments of approximately $223 in escrow as required by one state for partial self-insurance of workers’ compensation claims. Additionally, the Company is self-insured for its portion of employee medical expenses. At April 30, 2014 and 2013, the Company had $28,429 and $24,039, respectively, in accrued expenses for estimated claims relating to self-insurance, the majority of which has been actuarially determined.

Note_12_Subsequent_Events

Note 12 - Subsequent Events	12 Months Ended
	Apr. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events [Text Block]	'
	12.     SUBSEQUENT EVENTS
	Events that have occurred subsequent to April 30, 2014 have been evaluated for disclosure through the filing date of this Annual Report on Form 10-K/A (Amendment No. 1) with the Securities and Exchange Commission.

Note_13_Quaterly_Financial_Dat

Note 13 - Quaterly Financial Data	12 Months Ended
	Apr. 30, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Financial Information [Text Block]	'
	13.     Quarterly Financial Data (Dollars in thousands, except per share amounts) (Unaudited)
	Due to the immaterial error discussed in this Amendment No. 1, amounts in this footnote have been revised. For further discussion of the revision, see footnote 2, Correction of Immaterial Errors.
		Year ended April 30, 2014
		Q1		Q2		Q3		Q4		Year Total
	Total revenue
	Fuel	$	1,514,874		1,416,980		1,255,774		1,366,952		5,554,580
	Grocery & other merchandise		423,585		416,552		364,846		378,251		1,583,234
	Prepared food & fountain		166,248		171,751		158,200		162,977		659,176
	Other		10,042		10,602		11,235		11,386		43,265
		$	2,114,749		2,015,885		1,790,055		1,919,566		7,840,255
	Gross profit*
	Fuel	$	91,227		67,816		55,892		52,937		267,872
	Grocery & other merchandise		138,412		134,708		113,429		121,387		507,936
	Prepared food & fountain		102,754		106,171		96,147		97,924		402,996
	Other		10,028		10,590		11,222		11,372		43,212
		$	342,421		319,285		276,690		283,620		1,222,016
	Net income	$	53,795		39,430		12,663		20,932		126,820
	Income per common share
	Basic	$	1.4		1.03		0.33		0.54		3.3
	Diluted	$	1.39		1.01		0.33		0.54		3.26
		Year ended April 30, 2013
		Q1		Q2		Q3		Q4		Year Total
	Total revenue
	Fuel	$	1,330,670		1,393,476		1,185,640		1,319,371		5,229,157
	Grocery & other merchandise		386,129		362,662		329,657		340,263		1,418,711
	Prepared food & fountain		142,709		146,540		137,033		138,642		564,924
	Other		8,794		8,966		10,035		10,253		38,048
		$	1,868,302		1,911,644		1,662,365		1,808,529		7,250,840
	Gross profit*
	Fuel	$	55,896		54,779		49,186		61,561		221,422
	Grocery & other merchandise		128,834		121,206		104,660		107,963		462,663
	Prepared food & fountain		90,565		91,515		83,011		83,902		348,993
	Other		8,780		8,958		10,013		10,240		37,991
		$	284,075		276,458		246,870		263,666		1,071,069
	Net income	$	37,307		31,146		13,757		21,604		103,814
	Income per common share
	Basic	$	0.98		0.81		0.36		0.56		2.71
	Diluted	$	0.97		0.81		0.36		0.56		2.69
		Year ended April 30, 2012
		Q1		Q2		Q3		Q4		Year Total
	Total revenue
	Fuel	$	1,377,914		1,288,498		1,141,230		1,284,669		5,092,311
	Grocery & other merchandise		365,171		357,816		311,199		330,809		1,364,995
	Prepared food & fountain		123,483		128,838		118,750		128,281		499,712
	Other		6,904		7,366		7,771		8,745		30,786
		$	1,873,832		1,782,518		1,578,950		1,752,504		6,987,804
	Gross profit*
	Fuel	$	65,320		62,688		48,270		46,736		223,014
	Grocery & other merchandise		118,729		116,221		99,099		109,196		443,245
	Prepared food & fountain		75,843		76,658		72,714		77,944		303,159
	Other		6,890		7,351		7,757		8,729		30,727
		$	266,782		262,918		227,840		242,605		1,000,145
	Net income	$	39,391		37,632		16,162		21,509		114,694
	Income per common share
	Basic	$	1.04		0.99		0.42		0.56		3.01
	Diluted	$	1.03		0.98		0.42		0.56		2.99
	*Gross profit is given before charge for depreciation and amortization and credit card fees. Fiscal 2012 quarterly data was included for comparative purposes and to describe the impact of the immaterial error on Q3 and Q4 of 2012 as discussed in footnote 2, Correction of Immaterial Errors.

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	12 Months Ended
	Apr. 30, 2014
Accounting Policies [Abstract]	'
Consolidation, Policy [Policy Text Block]	'
	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, Policy [Policy Text Block]	'
	Use of estimates The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect 1) the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and 2) the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Cash and Cash Equivalents, Policy [Policy Text Block]	'
	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.
Inventory, Policy [Policy Text Block]	'
	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 for financial and income tax reporting applied to inventory values determined primarily by our FIFO accounting system for warehouse inventories.
	The excess of current cost over the stated LIFO value was $48,777 and $44,792 at April 30, 2014 and 2013, respectively. There were no material LIFO liquidations during the periods presented.      Below is a summary of the inventory values at April 30, 2014 and 2013:
		Fiscal 2014		Fiscal 2013
	Fuel	$	95,004	$	87,262
	Merchandise		109,829		102,252
	Total inventory	$	204,833	$	189,514
	Vendor allowances include rebates and other funds received from vendors to promote their products. The Company often receives such allowances on the basis of quantitative contract terms that vary by product and vendor or directly on the basis of purchases made. Vendor rebates in the form of rack display allowances (RDAs) are funds that we receive from various vendors for allocating certain shelf space to carry their specific products or to introduce new products in our stores for a particular period of time. The RDAs are treated as a reduction in cost of goods sold and are recognized ratably over the period covered by the applicable rebate agreement. These funds do not represent reimbursements of specific, incremental, identifiable costs incurred by us in selling the vendor’s products. Vendor rebates in the form of billbacks are treated as a reduction in cost of goods sold and are recognized at the time the product is sold. Reimbursements of an operating expense (e.g., advertising) are recorded as reductions of the related expense.
	Renewable Identification Numbers (RINs) are recorded as a reduction in cost of goods sold in the period when the Company commits to a price and agrees to sell all of the RINs earned during a specified period. The Company includes in cost of goods sold the costs we incur to acquire fuel and merchandise, including excise taxes, less vendor allowances and rebates and RINs.
Goodwill and Intangible Assets, Policy [Policy Text Block]	'
	Goodwill Goodwill and intangible assets with indefinite lives are tested for impairment at least annually. The Company assesses impairment annually at year-end using a market based approach to establish fair value. All of the goodwill assigned to the individual stores is aggregated into a single reporting unit due to the similar economic characteristics of the stores. As of April 30, 2014, there was $120,406 of goodwill and management’s analysis of recoverability completed as of the fiscal year-end yielded no evidence of impairment.
Property, Plant and Equipment, Impairment [Policy Text Block]	'
	Store closings and asset impairment The Company writes down property and equipment of stores it is closing to estimated net realizable value at the time management commits to a plan to close such stores and begins active marketing of the stores. The Company bases the estimated net realizable value of property and equipment on its experience in utilizing and/or disposing of similar assets and on estimates provided by its own and/or third-party real estate experts.
	The Company monitors closed and underperforming stores for an indication that the carrying amount of assets may not be recoverable. If the sum of the expected future undiscounted cash flows is less than the carrying amount of the assets, an impairment loss is recognized to the extent carrying value of the assets exceeds their estimated fair value. Fair value is based on management’s estimate of the price that would be received to sell an asset in an orderly transaction between market participants. The estimate is derived from offers, actual sale or disposition of assets subsequent to year-end, and other indications of fair value, which are considered Level 3 inputs. 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 $2,542 in fiscal 2014, $3,680 in fiscal 2013, and $226 in fiscal 2012. Impairment charges are a component of operating expenses.
Depreciation, Depletion, and Amortization [Policy Text Block]	'
	Depreciation and amortization Depreciation of property and equipment and amortization of capital lease assets are computed principally by the straight-line method over the following estimated useful lives:
	Buildings	25-40 years
	Machinery and equipment	5-30 years
	Leasehold interest in property and equipment	Lesser of term of lease or life of asset
	Leasehold improvements	Lesser of term of lease or life of asset
	The Company monitors stores and will accelerate depreciation if the expected life of the asset is reduced due to the operation of the store or the Company’s plans.
Excise Taxes [Policy Text Block]	'
	Excise taxes Excise taxes approximating $646,000, $596,000, and $527,000 on retail fuel sales are included in total revenue and cost of goods sold for fiscal 2014, 2013, and 2012, respectively.
Income Tax, Policy [Policy Text Block]	'
	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, Policy [Policy Text Block]	'
	Revenue recognition The Company recognizes retail sales of fuel, grocery & other merchandise, prepared food & fountain, and commissions on lottery, prepaid phone cards, and video rentals at the time of the sale to the customer. Sales taxes collected from customers and remitted to the government are recorded on a net basis in the consolidated financial statements.
Earnings Per Share, Policy [Policy Text Block]	'
	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. The calculation of diluted earnings per share treats stock options and restricted stock units outstanding as potential common shares to the extent they are dilutive.
Asset Retirement Obligations, Policy [Policy Text Block]	'
	Asset retirement obligations The Company recognizes the estimated future cost to remove underground storage tanks over the estimated useful life of the storage tank. The Company records a discounted liability for the fair value of an asset retirement obligation with a corresponding increase to the carrying value of the related long-lived asset at the time an underground storage tank is installed. The Company amortizes the amount added to other assets and recognizes accretion expense in connection with the discounted liability over the remaining life of the tank. The estimates of the anticipated future costs for removal of an underground storage tank are based on our prior experience with removal. Because these estimates are subjective and are currently based on historical costs with adjustments for estimated future changes in the associated costs, we expect the dollar amount of these obligations to change as more information is obtained.
	There were no material changes in our asset retirement obligation estimates during fiscal 2014. The recorded asset for asset retirement obligations was $8,391 and $8,011 at April 30, 2014 and 2013, respectively, and is recorded in other assets, net of amortization. The discounted liability was $12,854 and $12,176 at April 30, 2014 and 2013, respectively, and is recorded in other long-term liabilities.
Self Insurance Reserve [Policy Text Block]	'
	Self-insurance      The Company is primarily self-insured for workers' compensation, general liability, and automobile claims. The self-insurance claim liability 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 high degree of variability in the liability estimates. Some factors affecting the uncertainty of claims include the development time frame, settlement patterns, litigation and adjudication direction, and medical treatment and cost trends. The liability is not discounted. The balance of our self-insurance reserves were $28,429 and $24,039 for the years ended April 30, 2014 and 2013, respectively.
Environmental Costs, Policy [Policy Text Block]	'
	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, Policy [Policy Text Block]	'
	Derivative instruments      There were no options or futures contracts as of or during the years ended April 30, 2014, 2013, or 2012. However, we do from time to time, participate in a forward buy of certain commodities, primarily cheese and coffee. These are not accounted for as derivatives under the normal purchase and normal sale exclusions under the applicable guidance.
Compensation Related Costs, Policy [Policy Text Block]	'
	Stock-based compensation Stock-based compensation is recorded based upon the fair value of the award on the grant date. The cost of the award is recognized ratably in the statement of income over the vesting period of the award.
Segment Reporting, Policy [Policy Text Block]	'
	Segment reporting As of April 30, 2014, we operated 1,808 stores in 14 states. Our stores offer a broad selection of merchandise, fuel and other products and services designed to appeal to the convenience needs of our customers. We manage the business on the basis of one operating segment and therefore, have only one reportable segment. Our stores sell similar products and services, use similar processes to sell those products and services, and sell their products and services to similar classes of customers. We make specific disclosures concerning the three broad merchandise categories of fuel, grocery & other merchandise, and prepared food and fountain because it makes it easier for us to discuss trends and operational initiatives within our business and industry. Although we can separate gross margins 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.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	Recent accounting pronouncements In April 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-08, “Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity”, to clarify the definition of discontinued operations, limiting it to disposals of components that represent a strategic shift that has or will have a major effect on operations and financial results. Examples of a strategic shift include disposals of a major geographic area, a major line of business, or a major equity method investment. The standard is effective prospectively for disposals that occur within annual periods beginning on or after December 15, 2014, and interim periods within those annual periods. It will be adopted by the Company May 1, 2015. Early application is permitted in specific instances. We are currently evaluating the impact of adoption on our financial statements, however, we do not expect it to have a material impact on our consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The new standard is effective for the Company on May 1, 2017. Early application is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method nor has it determined the effect of the standard on its ongoing financial reporting.

Note_1_Significant_Accounting_1

Note 1 - Significant Accounting Policies (Tables)	12 Months Ended
	Apr. 30, 2014
Accounting Policies [Abstract]	'
Schedule of Inventory, Current [Table Text Block]	'
		Fiscal 2014		Fiscal 2013
	Fuel	$	95,004	$	87,262
	Merchandise		109,829		102,252
	Total inventory	$	204,833	$	189,514
Property, Plant and Equipment [Table Text Block]	'
	Buildings	25-40 years
	Machinery and equipment	5-30 years
	Leasehold interest in property and equipment	Lesser of term of lease or life of asset
	Leasehold improvements	Lesser of term of lease or life of asset

Note_2_Correction_of_Immateria1

Note 2 - Correction of Immaterial Errors (Tables)	12 Months Ended
	Apr. 30, 2014
Annual Error Correction for Income Statement [Member]	'
Note 2 - Correction of Immaterial Errors (Tables) [Line Items]	'
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]	'
		Year ended April 30,
		2014				2013				2012
		As		As		As		As		As		As
		Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
		Reported				Reported				Reported
	Cost of goods sold	$	6,605,996	$	6,618,239	$	6,168,475	$	6,179,771	$	5,984,114	$	5,987,659
	Interest, net		39,270		39,915		35,048		35,265		35,192		35,192
	Federal and state income taxes		72,018		66,824		64,504		59,802		66,724		65,276
	Net income		134,514		126,820		110,625		103,814		116,791		114,694
	Net income per common share
	Basic	$	3.5	$	3.3	$	2.89	$	2.71	$	3.07	$	3.01
	Diluted	$	3.46	$	3.26	$	2.86	$	2.69	$	3.04	$	2.99
Annual Error Correction for Balance Sheet [Member]	'
Note 2 - Correction of Immaterial Errors (Tables) [Line Items]	'
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]	'
		As of April 30,
		2014				2013
		As		As		As		As
		Previously		Adjusted		Previously		Adjusted
		Reported				Reported
	Deferred income taxes (asset)	$	11,878	$	23,292	$	9,916	$	16,066
	Accrued expenses other		33,171		61,117		29,436		44,494
	Deferred income taxes (liability)		317,953		318,023		293,708		293,708
	Retained earnings		685,988		669,386		579,176		570,268
	Total shareholders’ equity		719,866		703,264		602,295		593,387
Annual Error Correction for Cash Flow Statement [Member]	'
Note 2 - Correction of Immaterial Errors (Tables) [Line Items]	'
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]	'
		Years ended April 30,
		2014				2013				2012
		As		As		As		As		As		As
		Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
		Reported				Reported				Reported
	Net income	$	134,514	$	126,820	$	110,625	$	103,814	$	116,791	$	114,694
	Deferred income taxes		22,283		17,089		36,530		31,828		54,589		53,141
	Accrued expenses		20,930		33,818		4,270		15,783		7,399		10,944
Quarterly Error Correction for Income Statement [Member]	'
Note 2 - Correction of Immaterial Errors (Tables) [Line Items]	'
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]	'
		Three months				Three months				Six months
		ended 7/31/13				ended 10/31/13				ended 10/31/13
		As		As		As		As		As		As
		Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
		reported				reported				reported
	Cost of goods sold	$	1,769,239		1,772,328	$	1,693,584		1,696,600	$	3,462,823		3,468,928
	Interest, net		9,456		9,576		9,748		9,896		19,204		19,472
	Federal and state income taxes		33,869		32,575		22,289		21,014		56,158		53,589
	Net income		55,710		53,795		41,319		39,430		97,029		93,225
	Net income per
	Basic	$	1.45		1.4	$	1.07		1.03	$	2.53		2.43
	Diluted	$	1.43		1.39	$	1.06		1.01	$	2.5		2.4
		Three months				Nine months
		ended 1/31/14				ended 1/31/14
		As		As		As		As
		Previously		Adjusted		Previously		Adjusted
		reported				reported
	Cost of goods sold	$	1,510,182		1,513,365	$	4,973,005		4,982,293
	Interest, net		9,947		10,123		29,151		29,595
	Federal and state income taxes		7,899		6,556		64,057		60,145
	Net income		14,669		12,653		111,698		105,878
	Net income per
	Basic	$	0.38		0.33	$	2.91		2.76
	Diluted	$	0.38		0.33	$	2.87		2.73
Quarterly Error Correction for Cash Flow Statement [Member]	'
Note 2 - Correction of Immaterial Errors (Tables) [Line Items]	'
Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]	'
		Three months				Six months				Nine months
		ended 7/31/13				ended 10/31/13				ended 1/31/14
		As		As		As		As		As		As
		Previously		Adjusted		Previously		Adjusted		Previously		Adjusted
		reported				reported				reported
	Net income	$	55,710		53,795	$	97,029		93,225	$	111,698		105,878
	Deferred income taxes		3,122		1,828		11,202		8,633		14,030		10,118
	Accrued expenses		20,005		23,214		12,904		19,277		18,933		28,665

Note_3_Acquisitions_Tables

Note 3 - Acquisitions (Tables)	12 Months Ended
	Apr. 30, 2014
Business Combinations [Abstract]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	Assets acquired:
	Inventories	$	1,622
	Property and equipment		24,469
	Total assets		26,091
	Liabilities assumed:
	Accrued expenses		122
	Total liabilities		122
	Net tangible assets acquired		25,969
	Goodwill		5,615
	Total consideration paid	$	31,584
Business Acquisition, Pro Forma Information [Table Text Block]	'
		Years Ended April 30,
		2014		2013
	Total revenue	$	7,885,634	$	7,362,816
	Net income	$	127,615	$	105,699
	Net income per common share
	Basic	$	3.32	$	2.76
	Diluted	$	3.28	$	2.73

Note_4_Fair_Value_of_Financial1

Note 4 - Fair Value of Financial Instruments and Long Term Debt (Tables)	12 Months Ended
	Apr. 30, 2014
Fair Value Disclosures [Abstract]	'
Schedule of Debt [Table Text Block]	'
		As of April 30,
		2014		2013
	Capitalized lease obligations discounted at 5.22% to 7.09% due in various monthly installments through 2048 (Note 8)	$	10,195		9,891
	5.72% Senior notes due in 14 installments beginning September 30, 2012 and ending March 30, 2020		75,000		90,000
	5.22% Senior notes due August 9, 2020		569,000		569,000
	3.67% Senior notes (Series A) due in 7 installments beginning June 17, 2022, and ending June 15, 2028		150,000		—
	3.75% Senior notes (Series B) due in 7 installments beginning December 17, 2022 and ending December 18, 2028		50,000		—
			854,195		668,891
	Less current maturities		553		15,810
		$	853,642		653,081
Schedule of Maturities of Long-term Debt [Table Text Block]	'
	Years ended April 30,	Capital Leases		Senior Notes		Total
	2015	$	553		—		553
	2016		398		15,000		15,398
	2017		375		15,000		15,375
	2018		396		15,000		15,396
	2019		417		15,000		15,417
	Thereafter		8,056		784,000		792,056
		$	10,195		844,000	$	854,195

Note_5_Preferred_and_Common_St1

Note 5 - Preferred and Common Stock (Tables)	12 Months Ended
	Apr. 30, 2014
Preferred And Common Stock [Abstract]	'
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
			Number of				Weighted
			option shares				average option
							exercise price
	Outstanding at April 30, 2011			775,109			$	23.38
	Granted			441,000				44.39
	Exercised			(159,600	)			20.36
	Forfeited			(3,000	)			36.19
	Outstanding at April 30, 2012			1,053,509			$	32.59
	Granted			-				-
	Exercised			(198,200	)			23.82
	Forfeited			(500	)			14.08
	Outstanding at April 30, 2013			854,809			$	34.64
	Granted			-				-
	Exercised			(140,785	)			23.93
	Forfeited			(2,000	)			44.39
	Outstanding at April 30, 2014			712,024			$	36.73
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]	'
	Unvested at April 30, 2011			14,000
	Granted			38,198
	Vested			(14,000	)
	Forfeited			-
	Unvested at April 30, 2012			38,198
	Granted			46,998
	Vested			(14,000	)
	Forfeited			-
	Unvested at April 30, 2013			71,196
	Granted			91,650
	Vested			(14,150	)
	Forfeited			(150	)
	Unvested at April 30, 2014			148,546
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]	'
	Risk-free interest rate			2.14%
	Expected option life (years)			6.11
	Expected volatility			37%
	Expected dividend yield			1.58%
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	'
		Range of				Number			Weighted average		Weighted average remaining
		exercise prices				of shares			exercise price		contractual life (years)
		$	17.64				6,000			17.64		1
			20.68 – 26.92				278,024			25.34		4.4
			44.39				428,000			44.39		7.2
							712,024

Note_6_Net_Income_Per_Common_S1

Note 6 - Net Income Per Common Share (Tables)	12 Months Ended
	Apr. 30, 2014
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	'
		Years ended April 30,
		2014		2013		2012
	Basic
	Net income	$	126,820	$	103,814	$	114,694
	Weighted average shares outstanding-basic		38,457,680		38,297,083		38,068,001
	Basic earnings per common share	$	3.3	$	2.71	$	3.01
	Diluted
	Net income	$	126,820	$	103,814	$	114,694
	Weighted-average shares outstanding-basic		38,457,680		38,297,083		38,068,001
	Plus effect of stock options and restricted stock units		410,726		322,993		323,703
	Weighted-average shares outstanding-diluted		38,868,406		38,620,076		38,391,704
	Diluted earnings per common share	$	3.26	$	2.69	$	2.99

Note_7_Income_Taxes_Tables

Note 7 - Income Taxes (Tables)	12 Months Ended
	Apr. 30, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	'
		Years ended April 30,
		2014			2013			2012
	Current tax expense
	Federal	$	44,078		$	23,519		$	9,937
	State		5,657			4,455			2,345
			49,735			27,974			12,282
	Deferred tax expense		17,089			31,828			52,994
	Total income tax provision	$	66,824		$	59,802		$	65,276
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	'
		As of April 30,
		2014			2013
	Deferred tax assets
	Accrued liabilities	$	23,292		$	16,066
	Deferred compensation		6,272			6,050
	Equity compensation		3,598			916
	Unrecognized tax benefits		3,113			3,128
	State net operating losses and tax credits		2,757			3,902
	Other		98			100
	Total gross deferred tax assets		39,130			30,162
	Less valuation allowance		—			—
	Total net deferred tax assets		39,130			30,162
	Deferred tax liabilities
	Property and equipment depreciation		(318,565	)		(295,951	)
	Goodwill		(14,989	)		(11,919	)
	Other		(307	)		66
	Total gross deferred tax liabilities		(333,861	)		(307,804	)
	Net deferred tax liability	$	(294,731	)	$	(277,642	)
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	'
		Years ended April 30,
		2014			2013			2012
	Income taxes at the statutory rates		35.00%			35.00%			35.00%
	Federal tax credits		-2.1			-1.8			-2.2
	State income taxes, net of federal tax benefit		3.2			2.4			2.8
	Out of period adjustments		-1.4			—			—
	Other		-0.2			1			0.7
			34.50%			36.60%			36.30%
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	'
		2014			2013
	Beginning balance	$	8,938		$	7,538
	Additions based on tax positions related to current year		1,229			2,807
	Additions for tax positions of prior years		415			—
	Reductions for tax positions of prior years		—			(37	)
	Reductions due to lapse of applicable statute of limitations		(1,338	)		(1,370	)
	Settlements		—			—
	Ending balance	$	9,244		$	8,938

Note_8_Leases_Tables

Note 8 - Leases (Tables)	12 Months Ended
	Apr. 30, 2014
Leases [Abstract]	'
Schedule of Capital Leased Assets [Table Text Block]	'
		Asset balances at April 30,
		2014		2013
	Real estate	$	13,668	$	12,874
	Equipment		2,610		2,612
			16,278		15,486
	Less accumulated amortization		5,202		4,900
		$	11,076	$	10,586
Schedule Of Future Minimum Payments For Capital Leases And Noncancelable Operating Leases [Table Text Block]	'
	Years ended April 30,	Capital		Operating
		leases		leases
	2015	$	1,078	$	872
	2016		904		630
	2017		868		547
	2018		870		539
	2019		876		378
	Thereafter		12,875		261
	Total minimum lease payments		17,471	$	3,227
	Less amount representing interest		7,276
	Present value of net minimum lease payments	$	10,195

Note_13_Quaterly_Financial_Dat1

Note 13 - Quaterly Financial Data (Tables)	12 Months Ended
	Apr. 30, 2014
Quarterly Financial Information Disclosure [Abstract]	'
Schedule of Quarterly Financial Information [Table Text Block]	'
		Year ended April 30, 2014
		Q1		Q2		Q3		Q4		Year Total
	Total revenue
	Fuel	$	1,514,874		1,416,980		1,255,774		1,366,952		5,554,580
	Grocery & other merchandise		423,585		416,552		364,846		378,251		1,583,234
	Prepared food & fountain		166,248		171,751		158,200		162,977		659,176
	Other		10,042		10,602		11,235		11,386		43,265
		$	2,114,749		2,015,885		1,790,055		1,919,566		7,840,255
	Gross profit*
	Fuel	$	91,227		67,816		55,892		52,937		267,872
	Grocery & other merchandise		138,412		134,708		113,429		121,387		507,936
	Prepared food & fountain		102,754		106,171		96,147		97,924		402,996
	Other		10,028		10,590		11,222		11,372		43,212
		$	342,421		319,285		276,690		283,620		1,222,016
	Net income	$	53,795		39,430		12,663		20,932		126,820
	Income per common share
	Basic	$	1.4		1.03		0.33		0.54		3.3
	Diluted	$	1.39		1.01		0.33		0.54		3.26
		Year ended April 30, 2013
		Q1		Q2		Q3		Q4		Year Total
	Total revenue
	Fuel	$	1,330,670		1,393,476		1,185,640		1,319,371		5,229,157
	Grocery & other merchandise		386,129		362,662		329,657		340,263		1,418,711
	Prepared food & fountain		142,709		146,540		137,033		138,642		564,924
	Other		8,794		8,966		10,035		10,253		38,048
		$	1,868,302		1,911,644		1,662,365		1,808,529		7,250,840
	Gross profit*
	Fuel	$	55,896		54,779		49,186		61,561		221,422
	Grocery & other merchandise		128,834		121,206		104,660		107,963		462,663
	Prepared food & fountain		90,565		91,515		83,011		83,902		348,993
	Other		8,780		8,958		10,013		10,240		37,991
		$	284,075		276,458		246,870		263,666		1,071,069
	Net income	$	37,307		31,146		13,757		21,604		103,814
	Income per common share
	Basic	$	0.98		0.81		0.36		0.56		2.71
	Diluted	$	0.97		0.81		0.36		0.56		2.69
		Year ended April 30, 2012
		Q1		Q2		Q3		Q4		Year Total
	Total revenue
	Fuel	$	1,377,914		1,288,498		1,141,230		1,284,669		5,092,311
	Grocery & other merchandise		365,171		357,816		311,199		330,809		1,364,995
	Prepared food & fountain		123,483		128,838		118,750		128,281		499,712
	Other		6,904		7,366		7,771		8,745		30,786
		$	1,873,832		1,782,518		1,578,950		1,752,504		6,987,804
	Gross profit*
	Fuel	$	65,320		62,688		48,270		46,736		223,014
	Grocery & other merchandise		118,729		116,221		99,099		109,196		443,245
	Prepared food & fountain		75,843		76,658		72,714		77,944		303,159
	Other		6,890		7,351		7,757		8,729		30,727
		$	266,782		262,918		227,840		242,605		1,000,145
	Net income	$	39,391		37,632		16,162		21,509		114,694
	Income per common share
	Basic	$	1.04		0.99		0.42		0.56		3.01
	Diluted	$	1.03		0.98		0.42		0.56		2.99

Note_1_Significant_Accounting_2

Note 1 - Significant Accounting Policies (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Note 1 - Significant Accounting Policies (Details) [Line Items]	'	'	'
Number of Stores	1,808	'	'
Number of States in which Entity Operates	14	'	'
Population Of Communities	5,000	'	'
Excess of Replacement or Current Costs over Stated LIFO Value	$48,777	$44,792	'
Goodwill	120,406	114,791	'
Asset Impairment Charges	2,542	3,680	226
Excise Taxes Collected	646,000	596,000	527,000
Asset Retirement Obligation in Other Assets Net of Amortization	8,391	8,011	'
Asset Retirement Obligation, Liabilities Incurred	12,854	12,176	'
Self Insurance Reserve	$28,429	$24,039	'
Number of Operating Segments	1	'	'
Number of Reportable Segments	1	'	'
Gasoline [Member] | Sales Revenue, Goods, Net [Member]	'	'	'
Note 1 - Significant Accounting Policies (Details) [Line Items]	'	'	'
Concentration Risk, Percentage	71.00%	'	'
Grocery and Other Merchandise [Member] | Sales Revenue, Goods, Net [Member]	'	'	'
Note 1 - Significant Accounting Policies (Details) [Line Items]	'	'	'
Concentration Risk, Percentage	20.00%	'	'
Prepared Food and Fountain [Member] | Sales Revenue, Goods, Net [Member]	'	'	'
Note 1 - Significant Accounting Policies (Details) [Line Items]	'	'	'
Concentration Risk, Percentage	9.00%	'	'

Note_1_Significant_Accounting_3

Note 1 - Significant Accounting Policies (Details) - Summary of Inventory (USD $)	Apr. 30, 2014	Apr. 30, 2013
In Thousands, unless otherwise specified
Inventory [Line Items]	'	'
Inventory	$204,833	$189,514
Gasoline [Member]	'	'
Inventory [Line Items]	'	'
Inventory	95,004	87,262
Merchandise [Member]	'	'
Inventory [Line Items]	'	'
Inventory	$109,829	$102,252

Note_1_Significant_Accounting_4

Note 1 - Significant Accounting Policies (Details) - Depreciation of Property, Plant and Equipment	12 Months Ended
	Apr. 30, 2014
Building [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment useful life	'25 years
Building [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment useful life	'40 years
Machinery and Equipment [Member] | Minimum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment useful life	'5 years
Machinery and Equipment [Member] | Maximum [Member]	'
Property, Plant and Equipment [Line Items]	'
Property, plant and equipment useful life	'30 years
Leasehold Interest In Property And Equipment [Member]	'
Property, Plant and Equipment [Line Items]	'
Leasehold and leasehold improvements useful life	'Lesser of term of lease or life of asset
Leasehold Improvements [Member]	'
Property, Plant and Equipment [Line Items]	'
Leasehold and leasehold improvements useful life	'Lesser of term of lease or life of asset

Note_2_Correction_of_Immateria2

Note 2 - Correction of Immaterial Errors (Details) - Financial Revisions - Annual Statement of Income (USD $)	3 Months Ended												6 Months Ended	9 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Oct. 31, 2013	Jan. 31, 2014	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Cost of goods sold	'	$1,513,365	$1,696,600	$1,772,328	'	'	'	'	'	'	'	'	$3,468,928	$4,982,293	$6,618,239	$6,179,771	$5,987,659
Interest, net	'	10,123	9,896	9,576	'	'	'	'	'	'	'	'	19,472	29,595	39,915	35,265	35,192
Federal and state income taxes	'	6,556	21,014	32,575	'	'	'	'	'	'	'	'	53,589	60,145	66,824	59,802	65,276
Net income	20,932	12,653	39,430	53,795	21,604	13,757	31,146	37,307	21,509	16,162	37,632	39,391	93,225	105,878	126,820	103,814	114,694
Net income per common share	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Basic (in Dollars per share)	$0.54	$0.33	$1.03	$1.40	$0.56	$0.36	$0.81	$0.98	$0.56	$0.42	$0.99	$1.04	$2.43	$2.76	$3.30	$2.71	$3.01
Diluted (in Dollars per share)	$0.54	$0.33	$1.01	$1.39	$0.56	$0.36	$0.81	$0.97	$0.56	$0.42	$0.98	$1.03	$2.40	$2.73	$3.26	$2.69	$2.99
Scenario, Previously Reported [Member]	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Cost of goods sold	'	1,510,182	1,693,584	1,769,239	'	'	'	'	'	'	'	'	3,462,823	4,973,005	6,605,996	6,168,475	5,984,114
Interest, net	'	9,947	9,748	9,456	'	'	'	'	'	'	'	'	19,204	29,151	39,270	35,048	35,192
Federal and state income taxes	'	7,899	22,289	33,869	'	'	'	'	'	'	'	'	56,158	64,057	72,018	64,504	66,724
Net income	'	$14,669	$41,319	$55,710	'	'	'	'	'	'	'	'	$97,029	$111,698	$134,514	$110,625	$116,791
Net income per common share	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Basic (in Dollars per share)	'	$0.38	$1.07	$1.45	'	'	'	'	'	'	'	'	$2.53	$2.91	$3.50	$2.89	$3.07
Diluted (in Dollars per share)	'	$0.38	$1.06	$1.43	'	'	'	'	'	'	'	'	$2.50	$2.87	$3.46	$2.86	$3.04

Note_2_Correction_of_Immateria3

Note 2 - Correction of Immaterial Errors (Details) - Financial Revisions - Balance Sheet Data (USD $)	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
In Thousands, unless otherwise specified
Deferred income taxes (asset)	$23,292	$16,066	'	'
Accrued expenses other	61,117	44,494	'	'
Deferred income taxes (liability)	318,023	293,708	'	'
Retained earnings	669,386	570,268	'	'
Total shareholdersb equity	703,264	593,387	503,944	403,896
Scenario, Previously Reported [Member]	'	'	'	'
Deferred income taxes (asset)	11,878	9,916	'	'
Accrued expenses other	33,171	29,436	'	'
Deferred income taxes (liability)	317,953	293,708	'	'
Retained earnings	685,988	579,176	'	'
Total shareholdersb equity	$719,866	$602,295	'	'

Note_2_Correction_of_Immateria4

Note 2 - Correction of Immaterial Errors (Details) - Financial Revisions - Annual Statement of Cash Flow Data (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Apr. 30, 2014

Jan. 31, 2014

Oct. 31, 2013

Jul. 31, 2013

Apr. 30, 2013

Jan. 31, 2013

Oct. 31, 2012

Jul. 31, 2012

Apr. 30, 2012

Jan. 31, 2012

Oct. 31, 2011

Jul. 31, 2011

Oct. 31, 2013

Jan. 31, 2014

Apr. 30, 2014

Apr. 30, 2013

Apr. 30, 2012

Net income

$20,932

$12,653

$39,430

$53,795

$21,604

$13,757

$31,146

$37,307

$21,509

$16,162

$37,632

$39,391

$93,225

$105,878

$126,820

$103,814

$114,694

Deferred income taxes

'

'

'

-1,828

'

'

'

'

'

'

'

'

-8,633

-10,118

17,089

31,828

53,141

Accrued expenses

'

'

'

23,214

'

'

'

'

'

'

'

'

19,277

28,665

33,818

15,783

10,944

Scenario, Previously Reported [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

'

14,669

41,319

55,710

'

'

'

'

'

'

'

'

97,029

111,698

134,514

110,625

116,791

Deferred income taxes

'

'

'

-3,122

'

'

'

'

'

'

'

'

-11,202

-14,030

22,283

36,530

54,589

Accrued expenses

'

'

'

$20,005

'

'

'

'

'

'

'

'

$12,904

$18,933

$20,930

$4,270

$7,399

Note_2_Correction_of_Immateria5

Note 2 - Correction of Immaterial Errors (Details) - Financial Revisions - Quarterly Statement of Income Data (unaudited) (Incomplete) (USD $)	3 Months Ended												6 Months Ended	9 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Oct. 31, 2013	Jan. 31, 2014	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Cost of goods sold	'	$1,513,365	$1,696,600	$1,772,328	'	'	'	'	'	'	'	'	$3,468,928	$4,982,293	$6,618,239	$6,179,771	$5,987,659
Interest, net	'	10,123	9,896	9,576	'	'	'	'	'	'	'	'	19,472	29,595	39,915	35,265	35,192
Federal and state income taxes	'	6,556	21,014	32,575	'	'	'	'	'	'	'	'	53,589	60,145	66,824	59,802	65,276
Net income	20,932	12,653	39,430	53,795	21,604	13,757	31,146	37,307	21,509	16,162	37,632	39,391	93,225	105,878	126,820	103,814	114,694
Basic (in Dollars per share)	$0.54	$0.33	$1.03	$1.40	$0.56	$0.36	$0.81	$0.98	$0.56	$0.42	$0.99	$1.04	$2.43	$2.76	$3.30	$2.71	$3.01
Diluted (in Dollars per share)	$0.54	$0.33	$1.01	$1.39	$0.56	$0.36	$0.81	$0.97	$0.56	$0.42	$0.98	$1.03	$2.40	$2.73	$3.26	$2.69	$2.99
Scenario, Previously Reported [Member]	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Cost of goods sold	'	1,510,182	1,693,584	1,769,239	'	'	'	'	'	'	'	'	3,462,823	4,973,005	6,605,996	6,168,475	5,984,114
Interest, net	'	9,947	9,748	9,456	'	'	'	'	'	'	'	'	19,204	29,151	39,270	35,048	35,192
Federal and state income taxes	'	7,899	22,289	33,869	'	'	'	'	'	'	'	'	56,158	64,057	72,018	64,504	66,724
Net income	'	$14,669	$41,319	$55,710	'	'	'	'	'	'	'	'	$97,029	$111,698	$134,514	$110,625	$116,791
Basic (in Dollars per share)	'	$0.38	$1.07	$1.45	'	'	'	'	'	'	'	'	$2.53	$2.91	$3.50	$2.89	$3.07
Diluted (in Dollars per share)	'	$0.38	$1.06	$1.43	'	'	'	'	'	'	'	'	$2.50	$2.87	$3.46	$2.86	$3.04

Note_2_Correction_of_Immateria6

Note 2 - Correction of Immaterial Errors (Details) - Financial Revisions - Quarterly Statement of Cash Flow Data (unaudited) (Incomplete) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Apr. 30, 2014

Jan. 31, 2014

Oct. 31, 2013

Jul. 31, 2013

Apr. 30, 2013

Jan. 31, 2013

Oct. 31, 2012

Jul. 31, 2012

Apr. 30, 2012

Jan. 31, 2012

Oct. 31, 2011

Jul. 31, 2011

Oct. 31, 2013

Jan. 31, 2014

Apr. 30, 2014

Apr. 30, 2013

Apr. 30, 2012

Net income

$20,932

$12,653

$39,430

$53,795

$21,604

$13,757

$31,146

$37,307

$21,509

$16,162

$37,632

$39,391

$93,225

$105,878

$126,820

$103,814

$114,694

Deferred income taxes

'

'

'

1,828

'

'

'

'

'

'

'

'

8,633

10,118

-17,089

-31,828

-53,141

Accrued expenses

'

'

'

23,214

'

'

'

'

'

'

'

'

19,277

28,665

33,818

15,783

10,944

Scenario, Previously Reported [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

'

14,669

41,319

55,710

'

'

'

'

'

'

'

'

97,029

111,698

134,514

110,625

116,791

Deferred income taxes

'

'

'

3,122

'

'

'

'

'

'

'

'

11,202

14,030

-22,283

-36,530

-54,589

Accrued expenses

'

'

'

$20,005

'

'

'

'

'

'

'

'

$12,904

$18,933

$20,930

$4,270

$7,399

Note_3_Acquisitions_Details

Note 3 - Acquisitions (Details)	12 Months Ended
	Apr. 30, 2014
Note 3 - Acquisitions (Details) [Line Items]	'
Number Of Stores Opened	25
Number Of Stores Closed	1
Number Of Stores Expected To Open In Next Fiscal Year	2
Goodwill Deductible for Income Tax Purposes Period	'15 years
Stores [Member]	'
Note 3 - Acquisitions (Details) [Line Items]	'
Number of Businesses Acquired	28

Note_3_Acquisitions_Details_Al

Note 3 - Acquisitions (Details) - Allocation of the Purchase Price for Acquisitions (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Note 3 - Acquisitions (Details) - Allocation of the Purchase Price for Acquisitions [Line Items]	'	'	'
Goodwill	$120,406	$114,791	'
Total consideration paid	31,584	29,527	39,444
In Fiscal Year 2014 [Member]	'	'	'
Note 3 - Acquisitions (Details) - Allocation of the Purchase Price for Acquisitions [Line Items]	'	'	'
Inventories	1,622	'	'
Property and equipment	24,469	'	'
Total assets	26,091	'	'
Accrued expenses	122	'	'
Total liabilities	122	'	'
Net tangible assets acquired	25,969	'	'
Goodwill	5,615	'	'
Total consideration paid	$31,584	'	'

Note_3_Acquisitions_Details_Un

Note 3 - Acquisitions (Details) - Unaudited Pro Forma Information (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Unaudited Pro Forma Information [Abstract]	'	'
Total revenue	$7,885,634	$7,362,816
Net income	$127,615	$105,699
Net income per common share	'	'
Basic	$3.32	$2.76
Diluted	$3.28	$2.73

Note_4_Fair_Value_of_Financial2

Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) (USD $)	0 Months Ended	12 Months Ended
	Dec. 17, 2013	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) [Line Items]	'	'	'	'
Long-term Debt, Fair Value	'	$841,000,000	$721,000,000	'
Number Of Notes	'	2	'	'
Line of Credit Facility, Maximum Borrowing Capacity	'	'	100,000,000	'
Line of Credit Facility, Decrease, Forgiveness	25,000,000	'	'	'
Interest Income (Expense), Net	'	214,000	211,000	208,000
Interest Costs Capitalized	'	1,177,000	894,000	674,000
Note1 And Note 2 [Member]	'	'	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) [Line Items]	'	'	'	'
Debt Instrument Carrying Amount Of Each Note	'	50,000,000	'	'
Note 1 [Member]	'	'	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) [Line Items]	'	'	'	'
Interest Over Index	'	0.75%	'	'
Note 2 [Member]	'	'	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) [Line Items]	'	'	'	'
Interest Over Index	'	1.00%	'	'
Note 3 [Member]	'	'	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) [Line Items]	'	'	'	'
Line of Credit Facility, Amount Outstanding	'	$0	$59,100,000	'

Note_4_Fair_Value_of_Financial3

Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (USD $)	Apr. 30, 2014	Apr. 30, 2013
In Thousands, unless otherwise specified
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount [Line Items]	'	'
Senior Notes	$854,195	$668,891
Less current maturities	553	15,810
	853,642	653,081
Capital Lease Obligations [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount [Line Items]	'	'
Capitalized lease obligations discounted at 5.22% to 7.09% due in various monthly installments through 2048 (Note 8)	10,195	9,891
Senior Notes 5.72% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount [Line Items]	'	'
Senior Notes	75,000	90,000
Senior Notes 5.22% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount [Line Items]	'	'
Senior Notes	569,000	569,000
Senior Notes Series A, 3.67% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount [Line Items]	'	'
Senior Notes	150,000	'
Senior Notes Series B, 3.75% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount [Line Items]	'	'
Senior Notes	$50,000	'

Note_4_Fair_Value_of_Financial4

Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (Parentheticals)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Minimum [Member] | Capital Lease Obligations [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (Parentheticals) [Line Items]	'	'
Discount Rate Of Capitalized Lease Obligations	5.22%	5.22%
Maximum [Member] | Capital Lease Obligations [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (Parentheticals) [Line Items]	'	'
Discount Rate Of Capitalized Lease Obligations	7.09%	7.09%
Senior Notes 5.72% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (Parentheticals) [Line Items]	'	'
Stated Interest Rate	5.72%	5.72%
Senior Notes 5.22% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (Parentheticals) [Line Items]	'	'
Stated Interest Rate	5.22%	5.22%
Senior Notes Series A, 3.67% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (Parentheticals) [Line Items]	'	'
Stated Interest Rate	3.67%	'
Senior Notes Series B, 3.75% [Member]	'	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Long-term Debt at Carrying Amount (Parentheticals) [Line Items]	'	'
Stated Interest Rate	3.75%	'

Note_4_Fair_Value_of_Financial5

Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Aggregate Maturities of Long-term Debt (USD $)	Apr. 30, 2014
In Thousands, unless otherwise specified
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Aggregate Maturities of Long-term Debt [Line Items]	'
2015	$553
2016	15,398
2017	15,375
2018	15,396
2019	15,417
Thereafter	792,056
	854,195
Capital Lease Obligations [Member]	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Aggregate Maturities of Long-term Debt [Line Items]	'
2015	553
2016	398
2017	375
2018	396
2019	417
Thereafter	8,056
	10,195
Senior Notes [Member]	'
Note 4 - Fair Value of Financial Instruments and Long Term Debt (Details) - Aggregate Maturities of Long-term Debt [Line Items]	'
2016	15,000
2017	15,000
2018	15,000
2019	15,000
Thereafter	784,000
	$844,000

Note_5_Preferred_and_Common_St2

Note 5 - Preferred and Common Stock (Details) (USD $)

12 Months Ended

0 Months Ended

1 Months Ended

0 Months Ended

1 Months Ended

24 Months Ended

12 Months Ended

1 Months Ended

In Thousands, except Share data, unless otherwise specified

Apr. 30, 2014

Apr. 30, 2013

Apr. 30, 2012

Jun. 08, 2012

Jun. 10, 2011

Jun. 19, 2013

Jun. 07, 2013

Jun. 19, 2013

Jun. 23, 2011

Sep. 16, 2011

Sep. 13, 2013

Sep. 14, 2012

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Jun. 23, 2011

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Jun. 23, 2011

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Restricted Stock Units (RSUs) [Member]

Stock Options [Member]

Restricted Stock Units (RSUs) [Member]

Series A Preferred Stock [Member]

Stock Options [Member]

Stock Options [Member]

2009 Stock Incentive Plan [Member]

Director Stock Plan [Member]

Minimum [Member]

Maximum [Member]

Certain Officer And Key Employee [Member]

Certain Employee [Member]

Certain Employee [Member]

Certain Officer And Key Employee [Member]

Certain Officer And Key Employee [Member]

Certain Officer And Key Employee [Member]

Chief Executive Officer [Member]

Non-Employee [Member]

Non Employee Members Of The Board [Member]

Non Employee Members Of The Board [Member]

Note 5 - Preferred and Common Stock (Details) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Shares Authorized

1,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

250,000

'

'

'

'

'

'

'

Preferred Stock, Shares Issued

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common Stock, Shares Authorized

120,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,153,608

200,000

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

712,024

712,024

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures

'

'

'

32,998

9,198

77,650

76,150

1,500

15,000

14,000

14,000

14,000

'

'

'

'

'

'

'

'

'

441,000

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)

'

'

'

$59.48

$40.49

'

$62.26

$60.47

$44.39

$47.59

$71.02

$58.93

'

'

'

$14.65

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3 years

'5 years

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in Dollars)

$22,737

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term

'6 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number

284,024

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price (in Dollars per share)

$25.18

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term

'4 years 146 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value (in Dollars)

12,349

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars)

2,952

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation (in Dollars)

5,600

4,270

3,792

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)

'

'

'

'

'

'

'

'

'

'

'

'

$325

$4,036

'

'

'

'

'

'

'

'

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$17.64

'

'

'

'

'

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$44.39

'

'

'

'

'

Note_5_Preferred_and_Common_St3

Note 5 - Preferred and Common Stock (Details) - Stock Option Activity (USD $)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Note 5 - Preferred and Common Stock (Details) - Stock Option Activity [Line Items]	'	'	'	'
Outstanding- Number of option shares	712,024	712,024	'	'
Exercised- Number of option shares	-140,785,000	-198,200,000	-159,600,000	'
Employee Stock Option [Member]	'	'	'	'
Note 5 - Preferred and Common Stock (Details) - Stock Option Activity [Line Items]	'	'	'	'
Outstanding- Number of option shares	712,024	854,809	1,053,509	775,109
Outstanding- Weighted average option exercise price	$36.73	$34.64	$32.59	$23.38
Granted- Number of option shares	'	'	441,000	'
Granted- Weighted average option exercise price	'	'	$44.39	'
Exercised- Number of option shares	-140,785	-198,200	-159,600	'
Exercised- Weighted average option exercise price	$23.93	$23.82	$20.36	'
Forfeited- Number of option shares	-2,000	-500	-3,000	'
Forfeited- Weighted average option exercise price	$44.39	$14.08	$36.19	'

Note_5_Preferred_and_Common_St4

Note 5 - Preferred and Common Stock (Details) - Restricted Stock Units Activity (Restricted Stock Units (RSUs) [Member])	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Restricted Stock Units (RSUs) [Member]	'	'	'
Note 5 - Preferred and Common Stock (Details) - Restricted Stock Units Activity [Line Items]	'	'	'
Unvested at April 30	71,196	38,198	14,000
Granted	91,650	46,998	38,198
Vested	-14,150	-14,000	-14,000
Forfeited	-150	'	'
Unvested at April 30	148,546	71,196	38,198

Note_5_Preferred_and_Common_St5

Note 5 - Preferred and Common Stock (Details) - Grant Date Fair of Option, Significant Assumptions	12 Months Ended
	Apr. 30, 2014
Grant Date Fair of Option, Significant Assumptions [Abstract]	'
Risk-free interest rate	2.14%
Expected option life (years)	'6 years 40 days
Expected volatility	37.00%
Expected dividend yield	1.58%

Note_5_Preferred_and_Common_St6

Note 5 - Preferred and Common Stock (Details) - Range of Exercise Prices and Weighted Average Remaining Contractual Life of Outstanding Options (USD $)	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Number of shares (in Shares)	712,024	712,024
Weighted average remaining contractual life (years)	'6 years	'
Range 17.64 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Range of exercise prices	17.64	'
Number of shares (in Shares)	6,000	'
Weighted average exercise price	17.64	'
Weighted average remaining contractual life (years)	'1 year	'
Range 20.68 - 26.92 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Range of exercise prices -Minimum	20.68	'
Range of exercise prices -Maximum	26.92	'
Number of shares (in Shares)	278,024	'
Weighted average exercise price	25.34	'
Weighted average remaining contractual life (years)	'4 years 146 days	'
Range 44.39 [Member]	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Range of exercise prices	44.39	'
Number of shares (in Shares)	428,000	'
Weighted average exercise price	44.39	'
Weighted average remaining contractual life (years)	'7 years 73 days	'

Note_6_Net_Income_Per_Common_S2

Note 6 - Net Income Per Common Share (Details)	12 Months Ended
	Apr. 30, 2012
Earnings Per Share [Abstract]	'
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	439,000

Note_6_Net_Income_Per_Common_S3

Note 6 - Net Income Per Common Share (Details) - Earnings Per Share, Basic and Diluted (USD $)	3 Months Ended												6 Months Ended	9 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Oct. 31, 2013	Jan. 31, 2014	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Basic	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'	'
Net income (in Dollars)	$20,932	$12,653	$39,430	$53,795	$21,604	$13,757	$31,146	$37,307	$21,509	$16,162	$37,632	$39,391	$93,225	$105,878	$126,820	$103,814	$114,694
Weighted average shares outstanding-basic	'	'	'	'	'	'	'	'	'	'	'	'	'	'	38,457,680	38,297,083	38,068,001
Plus effect of stock options and restricted stock units	'	'	'	'	'	'	'	'	'	'	'	'	'	'	410,726	322,993	323,703
Weighted-average shares outstanding-diluted	'	'	'	'	'	'	'	'	'	'	'	'	'	'	38,868,406	38,620,076	38,391,704
Diluted earnings per common share (in Dollars per share)	$0.54	$0.33	$1.01	$1.39	$0.56	$0.36	$0.81	$0.97	$0.56	$0.42	$0.98	$1.03	$2.40	$2.73	$3.26	$2.69	$2.99
Basic earnings per common share (in Dollars per share)	$0.54	$0.33	$1.03	$1.40	$0.56	$0.36	$0.81	$0.98	$0.56	$0.42	$0.99	$1.04	$2.43	$2.76	$3.30	$2.71	$3.01

Note_7_Income_Taxes_Details

Note 7 - Income Taxes (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Note 7 - Income Taxes (Details) [Line Items]	'	'	'
Operating Loss Carryforwards	$71,471	'	'
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	2,760	'	'
Unrecognized Tax Benefits	9,244	8,938	7,538
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	6,131	'	'
Unrecognized Tax Benefits, Period Increase (Decrease)	306	'	'
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	402	286	'
Income Tax Examination, Penalties and Interest Expense	116	37	'
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Lower Bound	2,661	'	'
2010 and Forward (Member)	'	'	'
Note 7 - Income Taxes (Details) [Line Items]	'	'	'
Statute of Limitations for Federal Tax Years Open	'2010	'	'
2009 and Forward [Member]	'	'	'
Note 7 - Income Taxes (Details) [Line Items]	'	'	'
Statute of Limitations for State and Local Tax Years Open	'2009	'	'
State Alternative Minimum Tax Credit Carryforwards [Member]	'	'	'
Note 7 - Income Taxes (Details) [Line Items]	'	'	'
Tax Credit Carryforward, Amount	$129	'	'

Note_7_Income_Taxes_Details_Co

Note 7 - Income Taxes (Details) - Components of Income Tax Expense Attributable to Earnings (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Components of Income Tax Expense Attributable to Earnings [Abstract]	'	'	'
Federal	$44,078	$23,519	$9,937
State	5,657	4,455	2,345
	49,735	27,974	12,282
Deferred tax expense	17,089	31,828	52,994
Total income tax provision	$66,824	$59,802	$65,276

Note_7_Income_Taxes_Details_De

Note 7 - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $)	Apr. 30, 2014	Apr. 30, 2013
In Thousands, unless otherwise specified
Deferred tax assets	'	'
Accrued liabilities	$23,292	$16,066
Deferred compensation	6,272	6,050
Equity compensation	3,598	916
Unrecognized tax benefits	3,113	3,128
State net operating losses and tax credits	2,757	3,902
Other	98	100
Total gross deferred tax assets	39,130	30,162
Total net deferred tax assets	39,130	30,162
Deferred tax liabilities	'	'
Property and equipment depreciation	-318,565	-295,951
Goodwill	-14,989	-11,919
Other	-307	66
Total gross deferred tax liabilities	-333,861	-307,804
Net deferred tax liability	($294,731)	($277,642)

Note_7_Income_Taxes_Details_Ef

Note 7 - Income Taxes (Details) - Effective Income Tax Rate Reconciliation	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Effective Income Tax Rate Reconciliation [Abstract]	'	'	'
Income taxes at the statutory rates	35.00%	35.00%	35.00%
Federal tax credits	-2.10%	-1.80%	-2.20%
State income taxes, net of federal tax benefit	3.20%	2.40%	2.80%
Out of period adjustments	-1.40%	'	'
Other	-0.20%	1.00%	0.70%
	34.50%	36.60%	36.30%

Note_7_Income_Taxes_Details_Re

Note 7 - Income Taxes (Details) - Reconciliation of Unrecognized Tax Benefits (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Reconciliation of Unrecognized Tax Benefits [Abstract]	'	'
Beginning balance	$8,938	$7,538
Additions based on tax positions related to current year	1,229	2,807
Additions for tax positions of prior years	415	'
Reductions for tax positions of prior years	'	-37
Reductions due to lapse of applicable statute of limitations	-1,338	-1,370
Ending balance	$9,244	$8,938

Note_8_Leases_Details

Note 8 - Leases (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Leases [Abstract]	'	'	'
Operating Leases, Rent Expense, Net	$1,424	$1,773	$1,269

Note_8_Leases_Details_Leased_P

Note 8 - Leases (Details) - Leased Property Under Capital Leases By Major Classes (USD $)	Apr. 30, 2014	Apr. 30, 2013
In Thousands, unless otherwise specified
Capital Leased Assets [Line Items]	'	'
Capital Leased assets,gross	$16,278	$15,486
Less accumulated amortization	5,202	4,900
	11,076	10,586
Real Estate1 [Member]	'	'
Capital Leased Assets [Line Items]	'	'
Capital Leased assets,gross	13,668	12,874
Equipment [Member]	'	'
Capital Leased Assets [Line Items]	'	'
Capital Leased assets,gross	$2,610	$2,612

Note_8_Leases_Details_Future_M

Note 8 - Leases (Details) - Future Minimum Payments for Capital Leases And Noncancelable Operating Leases (USD $)	Apr. 30, 2014
In Thousands, unless otherwise specified
Future Minimum Payments for Capital Leases And Noncancelable Operating Leases [Abstract]	'
2015	$1,078
2015	872
2016	904
2016	630
2017	868
2017	547
2018	870
2018	539
2019	876
2019	378
Thereafter	12,875
Thereafter	261
Total minimum lease payments	17,471
Total minimum lease payments	3,227
Less amount representing interest	7,276
Present value of net minimum lease payments	$10,195

Note_9_Benefit_Plans_Details

Note 9 - Benefit Plans (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Note 9 - Benefit Plans (Details) [Line Items]	'	'	'
Defined Contribution Plan, Employer Discretionary Contribution Amount	$5,348	$4,949	$3,681
Common Stock, Capital Shares Reserved for Future Issuance (in Shares)	1,488,510	1,496,465	'
Deferred Compensation Liability, Current	5,925	6,457	'
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.40%	4.00%	'
Pension and Other Postretirement Benefit Expense	93	471	662
Expected Retirement Benefit Expense For Next Five Years	625	'	'
Other Postretirement Benefit Plan, Defined Benefit [Member]	'	'	'
Note 9 - Benefit Plans (Details) [Line Items]	'	'	'
Deferred Compensation Liability, Current and Noncurrent	3,950	4,016	'
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	167	'	'
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	497	'	'
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	497	'	'
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	497	'	'
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	441	'	'
Deferred Compensation Arrangement with Individual, Compensation Expense	$156	$438	$563

Note_10_Commitments_Details

Note 10 - Commitments (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014
Disclosure Text Block Supplement [Abstract]	'
CompensationCommitment	$660

Note_11_Contingencies_Details

Note 11 - Contingencies (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Loss Contingency [Abstract]	'	'
Other Accrued Liabilities	$300	$418
Annual Stop Loss Limit	1,000	'
Letters of Credit Outstanding, Amount	15,000	15,500
Investments In Escrow For Insurance	223	'
Accrued Expenses For Estimated Claims Relating To Self Insurance	$28,429	$24,039

Note_13_Quaterly_Financial_Dat2

Note 13 - Quaterly Financial Data (Details) - Quaterly Financial Data (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

12 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Apr. 30, 2014

Jan. 31, 2014

Oct. 31, 2013

Jul. 31, 2013

Apr. 30, 2013

Jan. 31, 2013

Oct. 31, 2012

Jul. 31, 2012

Apr. 30, 2012

Jan. 31, 2012

Oct. 31, 2011

Jul. 31, 2011

Oct. 31, 2013

Jan. 31, 2014

Apr. 30, 2014

Apr. 30, 2013

Apr. 30, 2012

Total revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

$1,919,566

$1,790,055

$2,015,885

$2,114,749

$1,808,529

$1,662,365

$1,911,644

$1,868,302

$1,752,504

$1,578,950

$1,782,518

$1,873,832

'

'

$7,840,255

$7,250,840

$6,987,804

Gross profit*

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross profit

283,620

[1]

276,690

[1]

319,285

[1]

342,421

[1]

263,666

[1]

246,870

[1]

276,458

[1]

284,075

[1]

242,605

[1]

227,840

[1]

262,918

[1]

266,782

[1]

'

'

1,222,016

[1]

1,071,069

[1]

1,000,145

[1]

Net income

20,932

12,653

39,430

53,795

21,604

13,757

31,146

37,307

21,509

16,162

37,632

39,391

93,225

105,878

126,820

103,814

114,694

Income per common share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basic (in Dollars per share)

$0.54

$0.33

$1.03

$1.40

$0.56

$0.36

$0.81

$0.98

$0.56

$0.42

$0.99

$1.04

$2.43

$2.76

$3.30

$2.71

$3.01

Diluted (in Dollars per share)

$0.54

$0.33

$1.01

$1.39

$0.56

$0.36

$0.81

$0.97

$0.56

$0.42

$0.98

$1.03

$2.40

$2.73

$3.26

$2.69

$2.99

Gasoline [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

1,366,952

1,255,774

1,416,980

1,514,874

1,319,371

1,185,640

1,393,476

1,330,670

1,284,669

1,141,230

1,288,498

1,377,914

'

'

5,554,580

5,229,157

5,092,311

Gross profit*

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross profit

52,937

[1]

55,892

[1]

67,816

[1]

91,227

[1]

61,561

[1]

49,186

[1]

54,779

[1]

55,896

[1]

46,736

[1]

48,270

[1]

62,688

[1]

65,320

[1]

'

'

267,872

[1]

221,422

[1]

223,014

[1]

Grocery and Other Merchandise [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

378,251

364,846

416,552

423,585

340,263

329,657

362,662

386,129

330,809

311,199

357,816

365,171

'

'

1,583,234

1,418,711

1,364,995

Gross profit*

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross profit

121,387

[1]

113,429

[1]

134,708

[1]

138,412

[1]

107,963

[1]

104,660

[1]

121,206

[1]

128,834

[1]

109,196

[1]

99,099

[1]

116,221

[1]

118,729

[1]

'

'

507,936

[1]

462,663

[1]

443,245

[1]

Prepared Food and Fountain [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

162,977

158,200

171,751

166,248

138,642

137,033

146,540

142,709

128,281

118,750

128,838

123,483

'

'

659,176

564,924

499,712

Gross profit*

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross profit

97,924

[1]

96,147

[1]

106,171

[1]

102,754

[1]

83,902

[1]

83,011

[1]

91,515

[1]

90,565

[1]

77,944

[1]

72,714

[1]

76,658

[1]

75,843

[1]

'

'

402,996

[1]

348,993

[1]

303,159

[1]

Other Segments [Member]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total revenue

11,386

11,235

10,602

10,042

10,253

10,035

8,966

8,794

8,745

7,771

7,366

6,904

'

'

43,265

38,048

30,786

Gross profit*

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gross profit

$11,372

[1]

$11,222

[1]

$10,590

[1]

$10,028

[1]

$10,240

[1]

$10,013

[1]

$8,958

[1]

$8,780

[1]

$8,729

[1]

$7,757

[1]

$7,351

[1]

$6,890

[1]

'

'

$43,212

[1]

$37,991

[1]

$30,727

[1]

[1]

Gross profit is given before charge for depreciation and amortization and credit card fees. Fiscal 2012 quarterly data was included for comparative purposes and to describe the impact of the immaterial error on Q3 and Q4 of 2012 as discussed in footnote 2, Correction of Immaterial Errors.