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The maximum aggregate amount at any time the credit facility may be increase to at the Company's option.

No definition available.

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The maximum aggregate amount the credit facility may be increased by at the Company's option.

No definition available.

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A restriction on the borrowing capacity of the line of credit facility. The restriction places a sublimit on the amount that can be borrowed for specific purposes.

No definition available.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

No definition available.

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Identification of whether the entity has been in compliance with any credit facility debt covenants during the period.

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Date the credit facility first became available, in YYYY-MM-DD format.

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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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Period between issuance and maturity of long-term debt, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Name:	us-gaap_UnsecuredDebt
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Balance Type:	credit
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Name:	us-gaap_DebtInstrumentAxis=us-gaap_LetterOfCreditMember
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Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
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Data Type:	na
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Name:	srt_RangeAxis=srt_MinimumMember
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Name:	srt_RangeAxis=srt_MaximumMember
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Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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Data Type:	na
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Name:	us-gaap_VariableRateAxis=orly_SpreadOverTermBenchmarkRevolvingLoansRateMember
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Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrMember
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