| Document and Entity Information | Apr. 01, 2021 |
| Cover [Abstract] | |
| Entity Registrant Name | NORTHERN OIL & GAS, INC. |
| Amendment Flag | false |
| Entity Central Index Key | 0001104485 |
| Document Type | 8-K |
| Document Period End Date | Apr. 1, 2021 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-33999 |
| Entity Tax Identification Number | 95-3848122 |
| Entity Address, Address Line One | 601 Carlson Parkway |
| Entity Address, Address Line Two | Suite 990 |
| Entity Address, City or Town | Minnetonka |
| Entity Address, State or Province | MN |
| Entity Address, Postal Zip Code | 55305 |
| City Area Code | (952) |
| Local Phone Number | 476-9800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 par value |
| Trading Symbol | NOG |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | false |
