Debt Instrument, Convertible, Measurement Period

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument, Convertible, Threshold Consecutive Trading Days, Sale Price Per Share

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Amount Of Borrowing Base Outstanding

+ References

No definition available.

+ Details

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Namespace Prefix:	ois_
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Period Type:	duration

- Definition

Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Covenant, Percentage Of Borrowing Base Outstanding

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Event Of Default, Amount Of Indebtedness

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Principal Amount Repurchased

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Debt Instrument, Springing Maturity, Subject To Amount Of Indebtedness In Excess

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Debt Instrument, Springing Maturity, Term

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Threshold Percentage of Sales Price Per Share

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

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- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

+ Details

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- Definition

Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

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- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- 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

No definition available.

+ Details

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

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.

+ References

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

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No definition available.

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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- Definition

The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Long-term Debt - Narrative (Details)					3 Months Ended		6 Months Ended	8 Months Ended	9 Months Ended		33 Months Ended
Long-term Debt - Narrative (Details)	Mar. 19, 2021 USD ($) day $ / shares	Feb. 10, 2021 USD ($)	Jan. 30, 2018 USD ($) $ / shares	Jan. 12, 2018 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 16, 2020 USD ($)	Feb. 10, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding					$ 16,500,000				$ 16,500,000		$ 16,500,000
Repayments of convertible debt									125,952,000	$ 20,078,000
Conversion price (in dollars per share) \| $ / shares	$ 10.49
Debt instrument carried value					160,434,000				160,434,000		160,434,000	$ 165,759,000
Promissory Note
Debt Instrument [Line Items]
Debt instrument, face amount				$ 25,000,000
Stated interest rate				2.50%
Settlement costs and expenses				$ 7,500,000
Debt instrument carried value					17,500,000				17,500,000		17,500,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 200,000,000					$ 350,000,000	$ 200,000,000
Long-term line of credit					0				0		0
Remaining borrowing capacity					61,400,000				61,400,000		61,400,000
Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Commitment fee percentage							0.25%	0.375%
Revolving Credit Facility \| Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate							1.75%	2.50%
Revolving Credit Facility \| Minimum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate							0.75%	1.50%
Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Commitment fee percentage							0.50%	0.50%
Revolving Credit Facility \| Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate							3.00%	3.75%
Revolving Credit Facility \| Maximum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate							2.00%	2.75%
Asset-based Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 125,000,000						$ 125,000,000
Debt instrument, springing maturity, term		91 days
Debt instrument, amount of indebtedness subject to springing maturity		$ 17,500,000
Debt instrument, covenant, minimum fixed charge coverage ratio		1.0
Debt instrument, percentage of borrowing base outstanding subject to covenant		15.00%
Debt instrument, amount of borrowing base outstanding subject to covenant		$ 14,100,000
Asset-based Revolving Credit Facility \| Revolving Credit Facility \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Asset-based Revolving Credit Facility \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Commitment fee percentage		0.375%
Asset-based Revolving Credit Facility \| Revolving Credit Facility \| Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		2.75%
Asset-based Revolving Credit Facility \| Revolving Credit Facility \| Minimum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Asset-based Revolving Credit Facility \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Commitment fee percentage		0.50%
Asset-based Revolving Credit Facility \| Revolving Credit Facility \| Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		3.25%
Asset-based Revolving Credit Facility \| Revolving Credit Facility \| Maximum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		2.25%
Asset-based Revolving Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 50,000,000						$ 50,000,000
1.5% Convertible Unsecured Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount			$ 200,000,000
Repayments of convertible debt	$ 120,000,000				$ 0	$ 9,483,000			$ 125,952,000	20,078,000	$ 152,800,000
Debt instrument, repurchased face amount	125,000,000
Stated interest rate					1.50%				1.50%		1.50%
Conversion ratio			0.0222748
Conversion price (in dollars per share) \| $ / shares			$ 44.89
Effective interest rate percentage			6.00%
Debt Instrument, principal amount repurchased					$ 0	$ 17,200,000			$ 131,400,000	$ 34,881,000	$ 174,000,000
Debt instrument carried value					$ 25,765,000				$ 25,765,000		$ 25,765,000	$ 143,242,000
4.75% Convertible Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount	135,000,000
Proceeds from debt, net	$ 130,600,000
Stated interest rate	4.75%				4.75%				4.75%		4.75%
Conversion ratio	0.0953516
Percentage of conversion price	130.00%
Threshold trading days \| day	20
Threshold consecutive trading days \| day	30
Threshold consecutive trading days, sale price per share \| day	5
Measurement period \| day	5
Percentage of sales price per share	98.00%
Amount of indebtedness in event of default	$ 40,000,000