XML 35 R53.htm IDEA: XBRL DOCUMENT
v3.2.0.727

Contingencies (Details) | 12 Months Ended |
--- | --- | ---
Apr. 30, 2015 USD ($) report lawsuit state | Apr. 30, 2014 USD ($)
Loss Contingency [Abstract] |  |
Other accrued liabilities | $ 388,000 | $ 300,000
Period covered by lawsuit | 2 years |
Number of consumer reports obtained | report | 3,900 |
Loss Contingencies |  |
Number of states in which entity operates | state | 14 |
Annual stop loss limit | $ 1,000,000 |
Letters of credit outstanding | 19,155,000 | 15,000,000
Investments In escrow for insurance | $ 223,000 |
Number of states that require partial self-insurance | state | 1 |
Self-insurance reserves | $ 31,389,000 | $ 28,429,000
Minimum |  |
Loss Contingencies |  |
Statutory damages per violation | 100 |
Maximum |  |
Loss Contingencies |  |
Statutory damages per violation | $ 1,000 |
Motor Fuel Temperature Sales Practices (Hot Fuel) |  |
Loss Contingencies |  |
Number of lawsuits | lawsuit | 4 |

X
- Definition Accrued Expenses For Estimated Claims Relating To Self Insurance + References No definition available. + Details
Name: | casy_AccruedExpensesForEstimatedClaimsRelatingToSelfInsuranc
Namespace Prefix: | casy_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Annual Stop Loss Limit + References No definition available. + Details
Name: | casy_AnnualStopLossLimit
Namespace Prefix: | casy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Investments In Escrow For Insurance + References No definition available. + Details
Name: | casy_InvestmentsInEscrowForInsurance
Namespace Prefix: | casy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loss Contingency, Consumer Report Litigation, Duration Included In Lawsuit + References No definition available. + Details
Name: | casy_LossContingencyConsumerReportLitigationDurationIncludedInLawsuit
Namespace Prefix: | casy_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Consumer Report Litigation, Number Of Reports Obtained + References No definition available. + Details
Name: | casy_LossContingencyConsumerReportLitigationNumberOfReportsObtained
Namespace Prefix: | casy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Damages Sought, Value Per Violation + References No definition available. + Details
Name: | casy_LossContingencyDamagesSoughtValuePerViolation
Namespace Prefix: | casy_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number Of States The Entity Operates In That Require Partial Self-Insurance + References No definition available. + Details
Name: | casy_NumberOfStatesTheEntityOperatesInThatRequirePartialSelfInsurance
Namespace Prefix: | casy_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LossContingencyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LitigationCaseAxis=casy_MotorFuelTemperatureSalesPracticesHotFuelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |