- Definition

The increase (decrease) in the percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	orn_DebtInstrumentIncreaseDecreaseInBasisSpreadOnVariableRate
Namespace Prefix:	orn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The interest rate percentage floor when determining variable rate options under the terms of a debt agreement.

+ References

No definition available.

+ Details

Name:	orn_DebtInstrumentInterestRateFloor
Namespace Prefix:	orn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated sales price of property per the terms of the sale agreement.

+ References

No definition available.

+ Details

Name:	orn_EstimatedPropertySalePrice
Namespace Prefix:	orn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of parcels of land to be sold pursuant to land sale contract.

+ References

No definition available.

+ Details

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

- Definition

Property Sale [Abstract]

+ References

No definition available.

+ Details

Name:	orn_PropertySaleAbstract
Namespace Prefix:	orn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=orn_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=orn_CreditAgreementAmendmentTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=orn_EastAndWestJonesPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=orn_BrixxTechnologiesLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details) $ in Millions	Feb. 27, 2024	Feb. 20, 2024 USD ($) a item	May 15, 2023
Term Loan \| 30-day SOFR
Debt instruments
Basis spread on variable rate			8.00%
Interest rate floor			4.00%
Subsequent event \| Revolving Credit Facility \| Credit Agreement Amendment Two
Debt instruments
Decrease in basis points on interest rate	0.50%
Subsequent event \| Revolving Credit Facility \| Credit Agreement Amendment Two \| 30-day SOFR
Debt instruments
Basis spread on variable rate	5.00%
Subsequent event \| Term Loan \| Credit Agreement Amendment Two
Debt instruments
Decrease in basis points on interest rate	1.00%
Subsequent event \| Term Loan \| Credit Agreement Amendment Two \| 30-day SOFR
Debt instruments
Basis spread on variable rate	7.00%
Interest rate floor	4.00%
Subsequent event \| East and West Jones Property \| Brixx Technologies LLC
Property sale
Number of parcels of land sold \| item		2
Area of land \| a		341.3
Estimated property sale price \| $		$ 34