Annual Stop Loss Limit

No definition available.

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Namespace Prefix:	casy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_LossContingencyAbstract
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

+ Details

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

- Definition

Amount of expenses incurred but not yet paid classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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- Details

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- Details

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- Details

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Period Type:

- Details

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Period Type:

Contingencies (Details) $ in Thousands			12 Months Ended
Contingencies (Details) $ in Thousands	Oct. 13, 2023 employee	Mar. 31, 2021 employee	Apr. 30, 2025 USD ($)	Apr. 30, 2024 USD ($)
Loss Contingency [Abstract]
Accrued environmental liability			$ 385	$ 299
Loss Contingencies [Line Items]
Self insurance reserve			74,471	$ 57,369
Pending Litigation \| McColley V Casey's General Stores Inc
Loss Contingencies [Line Items]
Number of plaintiffs \| employee	550	1,400
General Liability and Auto Liability Insurance
Loss Contingencies [Line Items]
Annual stop loss limit			2,000
Workers' Compensation Insurance
Loss Contingencies [Line Items]
Annual stop loss limit			$ 1,000