XML 33 R23.htm IDEA: XBRL DOCUMENT v2.4.0.8

Note 6 - Acquisitions (Details Textual)	6 Months Ended
	Oct. 31, 2014
Disclosure Text Block [Abstract]
Goodwill Deductible for Income Tax Purposes Period	15 years
Stores [Member]
Disclosure Text Block [Abstract]
Number of Businesses Acquired	29

X

- Definition

Goodwill deductible for income tax purposes, period.

+ References

No definition available.

+ Details

Name:	casy_GoodwillDeductibleForIncomeTaxPurposesPeriod
Namespace Prefix:	casy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

The number of businesses acquired by the entity during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfBusinessesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration