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Note 1 - Significant Accounting Policies (Details) - Summary of Inventory (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
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

X

- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.6(a))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_InventoryGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_InventoryLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration