| Cover | Sep. 01, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Sep. 01, 2023 |
| Entity Registrant Name | NexTier Oilfield Solutions Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-37988 |
| Entity Tax Identification Number | 38-4016639 |
| Entity Address, Address Line One | 3990 Rogerdale Rd |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77042 |
| Entity Address, City or Town | Houston, |
| City Area Code | 713 |
| Local Phone Number | 325-6000 |
| Title of 12(b) Security | Common Stock, $0.01, par value |
| Trading Symbol | NEX |
| Security Exchange Name | NYSE |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001688476 |
| Amendment Flag | false |
| Current Fiscal Year End Date | --12-31 |
