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Operating Leases - Operating Lease Expense Components (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Operating lease expense components: |  |  |
Leases with initial term of greater than 12 months | $ 8,588 | $ 8,481 | $ 8,325
Leases with initial term of 12 months or less | 4,159 | 4,852 | 4,718
Total operating lease expense | $ 12,747 | $ 13,333 | $ 13,043

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- Definition Operating Lease, Expense, Current + References No definition available. + Details
Name: | ois_OperatingLeaseExpenseCurrent
Namespace Prefix: | ois_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- 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

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- References No definition available. + Details
Name: | us-gaap_LeaseCostAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-4 + Details
Name: | us-gaap_OperatingLeaseExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration