| Document And Entity Information Document | May 18, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | May 18, 2021 |
| Entity Registrant Name | Oil States International, Inc |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-16337 |
| Entity Tax Identification Number | 76-0476605 |
| Entity Address, Address Line One | Three Allen Center, 333 Clay Street |
| Entity Address, Address Line Two | Suite 4620 |
| Entity Address, City or Town | Houston |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77002 |
| City Area Code | 713 |
| Local Phone Number | 652-0582 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.01 per share |
| Trading Symbol | OIS |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001121484 |
| Amendment Flag | false |
