SHARE-BASED COMPENSATION AND BENEFIT PLANS (Restricted Stock) (Narrative) (Details) - Restricted stock [Member] $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Share-Based Compensation and Benefit Plans
Remaining unrecognized compensation expense	$ 0.5
Weighted-average period for cost recognition	3 months 18 days
Minimum [Member] \| Employee [Member].
Share-Based Compensation and Benefit Plans
Vesting period	1 year
Maximum [Member] \| Employee [Member].
Share-Based Compensation and Benefit Plans
Vesting period	3 years

Line items represent an arrangement under which an individual receives compensation benefits. Such an arrangement is usually provided to employees to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

No definition available.

+ Details

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Namespace Prefix:	orly_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

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Period Type:	duration

- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

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- Details

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Namespace Prefix:
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- Details

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- Details

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Namespace Prefix:
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- Details

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