The annual percentage rent increase per terms of the failed sale leaseback arrangement.

No definition available.

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Namespace Prefix:	orn_
Data Type:	dtr-types:percentItemType
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- Definition

The yearly payments due under a failed sale leaseback arrangement entered into in connection with the transaction involving the sale of property to another party and the lease of the property back to the seller.

+ References

No definition available.

+ Details

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Namespace Prefix:	orn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Term of failed sale leaseback arrangement.

+ References

No definition available.

+ Details

Name:	orn_FailedSaleLeasebackArrangementLeaseTermOfContract
Namespace Prefix:	orn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of available options under failed sale leaseback arrangement.

+ References

No definition available.

+ Details

Name:	orn_FailedSaleLeasebackArrangementLeaseTermOfOptions
Namespace Prefix:	orn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of consecutive options to extend the term available under a failed sale leaseback arrangement.

+ References

No definition available.

+ Details

Name:	orn_FailedSaleLeasebackArrangementNumberOfExtensionOptions
Namespace Prefix:	orn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash inflow before closing and debt issuance costs received by a seller-lessee in a failed sale-leaseback recognized in financing activities.

+ References

No definition available.

+ Details

Name:	orn_FailedSaleLeasebackTransactionGrossProceedsFinancingActivities
Namespace Prefix:	orn_
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://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 840
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481295/840-40-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479741/842-40-50-2

+ Details

Name:	us-gaap_SaleLeasebackTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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- Details

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- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=orn_PortLavacaSouthYardPropertySaleLeasebackMember
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Balance Type:
Period Type:

- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=orn_ChannelviewTexas17300And17140MarketStreetPropertySaleLeasebackMember
Namespace Prefix:
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Other Long-Term Liabilities - Sale-Leaseback (Details) $ in Millions	Jun. 23, 2023 USD ($) Options	May 15, 2023 USD ($)	Sep. 27, 2019 USD ($) Options
Equipment Sale Leaseback
Failed Sale Leaseback
Sale price		$ 13.0
Equipment Sale Leaseback \| Minimum
Failed Sale Leaseback
Lease term		1 year
Equipment Sale Leaseback \| Maximum
Failed Sale Leaseback
Lease term		3 years
Port Lavaca South Yard Property Sale Leaseback
Failed Sale Leaseback
Lease term	20 years
Annual rent	$ 1.1
Annual percentage rent increase	2.50%
Number of consecutive options to extend term \| Options	4
Term of available options	5 years
17300 and 17140 Market Street Locations, Channelview, Texas Sale Leaseback
Failed Sale Leaseback
Sale price			$ 19.1
Lease term			15 years
Annual rent			$ 1.5
Annual percentage rent increase			2.00%
Number of consecutive options to extend term \| Options			2
Term of available options			10 years