Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2017
Mar. 09, 2018
Jun. 30, 2017
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Trading Symbol TELL    
Entity Registrant Name TELLURIAN INC. /DE/    
Entity Central Index Key 0000061398    
Current Fiscal Year End Date --12-31    
Entity Filer Category Smaller Reporting Company    
Entity Voluntary Filers No    
Entity Common Stock, Shares Outstanding   228,392,249  
Entity Public Float     $ 646,384,724
Entity Well Known Seasoned Issuer Yes    
Entity Current Reporting Status Yes