XML 71 R21.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Apr. 30, 2013
Significant Accounting Policies [Abstract] |
Summary Of Inventory Values |
|  | Fiscal 2013 |  | Fiscal 2012
Gasoline |  | 87,262 |  | 83,063
Merchandise |  | 102,252 |  | 87,731
Total inventory |  | 189,514 |  | 170,794
Schedule Of Depreciation Of Property, Plant And Equipment |
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 |

X
- Definition Schedule Of Depreciation Of Property Plant And Equipment [Table Text Block] + References No definition available. + Details
Name: | casy_ScheduleOfDepreciationOfPropertyPlantAndEquipmentTableTextBlock
Namespace Prefix: | casy_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Inventory [Table Text Block] + References No definition available. + Details
Name: | casy_ScheduleOfInventoryTableTextBlock
Namespace Prefix: | casy_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration