Annual report pursuant to Section 13 and 15(d)


$ in Millions
12 Months Ended
Dec. 31, 2020
Mar. 09, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-33999    
Entity Registrant Name NORTHERN OIL AND GAS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 95-3848122    
Entity Address, Address Line One 601 Carlson Pkwy – 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    
Title of 12(b) Security Common Stock, $0.001 par value    
Trading Symbol NOG    
Security Exchange Name NYSEAMER    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 266.2
Entity Common Stock, Shares Outstanding   60,421,200  
Documents Incorporated by Reference Portions of the definitive proxy statement related to the registrant’s 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this report for the year ended December 31, 2020.    
Document Fiscal Period Focus FY    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Entity Central Index Key 0001104485