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Operating Leases - Operating Lease Expense Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating lease expense components:
Leases with initial term of greater than 12 months	$ 9,412	$ 12,564	$ 11,972
Leases with initial term of 12 months or less	4,232	4,024	5,906
Total operating lease expense	$ 13,644	$ 16,588	$ 17,878

X

- Definition

Operating Lease, Expense, Current

+ References

No definition available.

+ Details

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Namespace Prefix:	ois_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Operating Lease, Expense, Noncurrent

+ References

No definition available.

+ Details

Name:	ois_OperatingLeaseExpenseNoncurrent
Namespace Prefix:	ois_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

+ Details

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