SHARE-BASED COMPENSATION AND BENEFIT PLANS (Other Share-Based Compensation Activity) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Employee stock purchase plan [Member]
Share-Based Compensation and Benefit Plans
Compensation expense for share-based compensation	$ 828	$ 832	$ 2,429	$ 2,264
Income tax benefit from compensation expense for share-based compensation	205	205	603	559
Restricted stock [Member]
Share-Based Compensation and Benefit Plans
Compensation expense for share-based compensation	459	401	1,350	1,177
Income tax benefit from compensation expense for share-based compensation	$ 114	$ 99	$ 335	$ 291

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_
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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

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Balance Type:	debit
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- Definition

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

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- Details

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- Details

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